마이실피르넷

# 다음은 포트 번호입니다.
#
port 7690
#
# 다음은 서버 이름입니다.
#
server it.mokpo.ac.kr
#
# 다음은 관리자 메일입니다.
#
admin admin@it.mokpo.ac.kr
#

import java.io.*;
import java.util.*;

public class ConfigurationReader
{
	String file;
	char comment;
	Hashtable ht;
	String delm;

	public ConfigurationReader(String file)
	{
		this(file, '#', " \t");
	}

	public ConfigurationReader(String file, char comment)
	{
		this(file, comment, " \t");
	}

	public ConfigurationReader(String file, char comment, String delm)
	{
		this.file = file;
		this.comment = comment;
		this.delm = delm;
		ht = new Hashtable();
	}

	public void parse() throws IOException
	{
		String rl;
		BufferedReader br =  new BufferedReader(new FileReader(file));
		while ((rl=br.readLine()) != null)
		{
			rl = rl.trim();
			if (rl.charAt(0) == comment)
			{
				continue;
			}else{
				StringTokenizer st = new StringTokenizer(rl,delm,false);
				String key = st.nextToken();
				String value = st.nextToken();
				ht.put(key, value);
			}
		}
		br.close();
	}

	public String getValue(String name)
	{
		return (String)ht.get(name);
	}

	public static void main(String args[])
	{
		ConfigurationReader cr = new ConfigurationReader("server.conf");
		try
		{
			cr.parse();
			System.out.println(cr.getValue("port"));
			System.out.println(cr.getValue("server"));
			System.out.println(cr.getValue("admin"));
		}
		catch (Exception e) { }
	}
}

/*
---------- JAVAC ----------
Note: ConfigurationReader.java uses unchecked or unsafe operations.
Note: Recompile with -Xlint:unchecked for details.

출력 완료 (1초 경과) - 정상 종료

권장되지 않은 명령어를 사용해서 나오는 오류
Sun 에서는 1.5이상에서 컬렉션프레임워크 사용시
제네릭 프로그래밍을 권장하기 때문

※ 프레임워크
생성된 객체들을 보관하고 있는 클래스

※ 제네릭 프로그래밍
효율적인 알고리즘의 추상적인
형태를 표현하기 위한 프로그래밍 방법
*/

import java.io.*;
import java.text.*;

public class ConsoleWriter extends PrintWriter
{
	public ConsoleWriter(OutputStream out)
	{
		super(out, true);
	}

	public ConsoleWriter(Writer out)
	{
		super(out, true);
	}

	public void printWon(long value)
	{
		String format = "W#,###";
		DecimalFormat df = new DecimalFormat(format);
		print(df.format(value));
	}

	public void printlnWon(long value)
	{
		printWon(value);
		println();
	}

	public void printDollar(float value)
	{
		String format = "$#,###.00";
		DecimalFormat df = new DecimalFormat(format);
		print(df.format(value));
	}

	public void printlnDollar(float value)
	{
		printDollar(value);
		println();
	}

	public void print(double value, int digit)
	{
		String format = "#.";
		for (int i=0; i < digit; i++)
		{
			format += "#";
		}
		DecimalFormat df = new DecimalFormat(format);
		print(df.format(value));
		flush();
	}

	public void println(double value, int digit)
	{
		print(value, digit);
		println();
	}
}

public class ConsoleWriterTest
{
	public static void main(String args[])
	{
		try
		{
			ConsoleWriter out = new ConsoleWriter(System.out);
			double d = 123.456789;
			int money = 1234567;

			out.println(d);
			out.println(d, 2);
			out.printlnWon(money);
			out.printlnDollar(money);
		}
		catch (Exception e)
		{
			System.out.println(e);
		}
	}
}

123
123.456
한
한글입니다.

import java.io.*;

public class ReadFileData
{
	public static void main(String args[])
	{
		int ivalue;
		double dvalue;
		char cvalue;
		String svalue;

		try
		{
			ConsoleReader in = new ConsoleReader(new FileReader("data.txt"));
			ivalue = in.readInt();
			System.out.println("value = " + ivalue);
			dvalue = in.readDouble();
			System.out.println("value = " + dvalue);
			cvalue = in.readChar();
			System.out.println("value = " + cvalue);
			svalue = in.readString();
			System.out.println("value = " + svalue);
		}
		catch (Exception e)
		{
			System.out.println("타입에 맞지 않은 입력입니다.");
		}
	}
}

import java.io.*;

public class FileCopy
{
	public static void main(String args[])
	{
		if (args.length != 2)
		{
			System.out.println("usage: java FileCopy");
			System.out.println("<filename> <filename>");
			System.exit(1);
		}
		try
		{
			Copier cp = new Copier(new FileInputStream(args[0]),new FileOutputStream(args[1]));
			cp.copy();
			System.out.println("파일 복사가 완료되었습니다.");
		}
		catch (Exception e)
		{
			System.out.println(e);
		}
	}
}

import java.io.*;

public class More
{
	public static void main(String args[])
	{
		if (args.length != 1)
		{
			System.out.println("usage: java More <filename>");
			System.exit(1);
		}
		try
		{
			Copier cp = new Copier(new FileInputStream(args[0]),System.out);
			cp.copy();
		}
		catch (Exception e)
		{
			System.out.println(e);
		}
	}
}

import java.io.*;

public class ConsoleCopy
{
	public static void main(String args[])
	{
		if (args.length != 1)
		{
			System.out.println("usage:java Consolecopy <filename>");
			System.exit(1);
		}
		try
		{
			Copier cp = new Copier(System.in, new FileOutputStream(args[0]));
			cp.copy();
		}
		catch (Exception e)
		{
			System.out.println(e);
		}
	}
}

import java.io.*;

public class Copier
{
	protected InputStream in;
	protected OutputStream out;
	protected byte data[];

	public Copier(InputStream in, OutputStream out, int sz)
	{
		this.in = in;
		this.out = out;
		data = new byte[sz];
	}

	public Copier(InputStream in, OutputStream out)
	{
		this(in, out, 1024);
	}

	public void copy() throws IOException
	{
		int n=0;
		while ((n = in.read(data)) != -1)
		{
			out.write(data, 0, n);
		}
		in.close();
		out.close();
	}
}

import java.io.*;

public class ConsoleReader extends BufferedReader
{
	public ConsoleReader(Reader in) throws IOException
	{
		super(in);
	}

	public ConsoleReader(InputStream in) throws IOException
	{
		super(new InputStreamReader(in));
	}

	public int readInt() throws IOException
	{
		return Integer.parseInt(readLine().trim());
	}

	public String readString() throws IOException
	{
		return readLine().trim();
	}

	public char readChar() throws IOException
	{
		String line = readLine().trim();
		return line.charAt(0);
	}

	public double readDouble() throws IOException
	{
		Double d = new Double(readLine().trim());
		return d.doubleValue();
	}
}

import java.io.*;

public class ConsoleReaderTest
{
	public static void main(String args[])
	{
		int ivalue;
		double dvalue;
		char cvalue;
		String svalue;
	
		try
		{
			ConsoleReader in = new ConsoleReader(System.in);
			System.out.print("정수를 입력해주세요:");
			ivalue = in.readInt();
			System.out.println("value = " + ivalue);
			System.out.print("\n실수를 입력해주세요:");
			dvalue = in.readDouble();
			System.out.println("value = " + dvalue);
			System.out.print("\n문자를 입력해주세요:");
			cvalue = in.readChar();
			System.out.println("value = " + cvalue);
			System.out.print("\n문자열을 입력해주세요:");
			svalue = in.readString();
			System.out.println("value = " + svalue);
		}
		catch (Exception e)
		{
			System.out.println("타입에 맞지 않은 입력입니다.");
		}
	}
}

import java.util.*;

public class ScannerTest
{
	public static void main(String args[])
	{
		System.out.print("->");

		Scanner sc = new Scanner(System.in);
		while (sc.hasNextInt())
		{
			int i = sc.nextInt();
			System.out.println(i);
		}

		System.out.println("-----------------------");
		while (sc.hasNext())
		{
			String s = sc.next();
			System.out.println(s);
		}
	}
}

import java.io.IOException;

public class SimpleRead
{
	public static void main(String args[])
	{
		int b=0, count =0;
		
		try
		{
			b = System.in.read();
			while (b != -1)
			{
				System.out.print((char)b);
				count++;
				b = System.in.read();
			}
		}
		catch (IOException e)
		{
			System.out.println(e);
		}

		System.out.println();
		System.out.println("total byte:" + count);
	}
}

import java.awt.*;
import java.applet.Applet;

public class ImgTest extends Applet
{
	Image duke;

	public void init()
	{
		duke = getImage(getDocumentBase(),"duke.gif");
	}

	public void paint(Graphics g)
	{
		g.drawImage(duke, 25, 25, this);
	}
}

<html>
<head>
<title>애플릿 테스트</title>
</head>
<body>
<applet code=ImgTest width=300 height=300></applet>
</body>
</html>

import java.awt.*;
import java.awt.event.*;

public class SimpleCard extends Frame implements ItemListener
{
	private Panel body, ps[];
	private Choice choice;
	private CardLayout card;
	private int selected; //현재 선택된 패널 번호

	public SimpleCard()
	{
		super("카드 레이아웃");
		body = new Panel();
		body.setLayout(card = new CardLayout());
		MouseHandler handler = new MouseHandler();
	
		String data[] = {"First", "Second", "Third", "Fourth", "Fifth"};
		Color colors[] = {Color.YELLOW, Color.GREEN,
			 Color.MAGENTA, Color.WHITE, Color.CYAN};
		ps = new Panel[data.length];

		for (int i=0; i < ps.length; i++)
		{
			ps[i] = new Panel();
			ps[i].setBackground(colors[i]);
			ps[i].add(new Label(data[i] + " Panel"));
			ps[i].addMouseListener(handler);
			body.add(String.valueOf(i), ps[i]);
		}
		card.show(body, "0");
		selected = 0;

		choice = new Choice();
		choice.addItemListener(this);
		for (int i=0; i < ps.length; i++)
		{
			choice.add(String.valueOf(i+1));
		}

		add(choice, "East");
		add(body, "Center");
		addWindowListener(new WindowHandler());
		setSize(300, 200);
		setVisible(true);
	}

	public void itemStateChanged(ItemEvent e)
	{
		Object o = e.getSource();
		if (o == choice)
		{
			int index = choice.getSelectedIndex();
			card.show(body, String.valueOf(index));
			selected = index;
		}
	}

	public class MouseHandler extends MouseAdapter
	{
		public void mouseClicked(MouseEvent e)
		{
			card.next(body);
			selected = (selected + 1) % ps.length;
			choice.select(selected);
		}
	}

	public class WindowHandler extends WindowAdapter
	{
		public void windowClosing(WindowEvent e)
		{
			setVisible(false);
			dispose();
			System.exit(0);
		}
	}

	public static void main(String args[])
	{
		new SimpleCard();
	}
}

import java.awt.*;
import java.awt.event.*;

public class AWT extends Frame implements ActionListener, ItemListener
{
	protected MenuItem exit;
	protected TextField field;
	protected TextArea text;
	protected Choice choice;

	public AWT()
	{
		super("AWT테스트");
		makeMenu();
		makeBody();
		setSize(400, 500);
		setVisible(true);
	}

	protected void makeMenu()
	{
		MenuBar bar = new MenuBar();
		Menu file = new Menu("File");
		exit = new MenuItem("Exit");
		exit.addActionListener(this);
		file.add(exit);
		bar.add(file);
		setMenuBar(bar);
	}

	protected void makeBody()
	{
		Panel top = new Panel(new BorderLayout());
		top.add(new Label("데이터"), BorderLayout.WEST);
		field = new TextField();
		field.addActionListener(this);
		top.add(field, BorderLayout.CENTER);
		add(top, BorderLayout.NORTH);

		text = new TextArea();
		add(text, BorderLayout.CENTER);

		choice = new Choice();
		choice.addItemListener(this);
		choice.add("사과");
		choice.add("배");
		choice.add("귤");
		add(choice, BorderLayout.SOUTH);
	}

	public void actionPerformed(ActionEvent e)
	{
		Object o = e.getSource();
		if (o == exit)
		{
			setVisible(false);
			System.exit(0);
		}else if(o == field){
			text.append(field.getText());
			text.append("\n");
			field.setText("");
		}
	}

	public void itemStateChanged(ItemEvent e)
	{
		Object o = e.getSource();
		if (o == choice)
		{
			if (e.getStateChange() == ItemEvent.SELECTED)
			{
				String item = choice.getSelectedItem();
				text.append(item);
				text.append("\n");
			}
		}
	}

	public static void main(String args[])
	{
		new AWT();
	}
}

import java.awt.*;
import javax.swing.*;

public class SpinnerTest extends JFrame
{
	protected JSpinner score, color, date;

	public SpinnerTest()
	{
		super("Spinner 테스트");
		JPanel panel = new JPanel(new GridLayout(3,2));
		SpinnerNumberModel scoreModel = new SpinnerNumberModel(0,0,100,5);
		score = new JSpinner(scoreModel);
		panel.add(new JLabel("점수"));
		panel.add(score);
		
		String colors[] = {"빨강", "노랑", "파랑"};
		SpinnerListModel colorModel = new SpinnerListModel(colors);
		color = new JSpinner(colorModel);
		panel.add(new JLabel("좋아하는 색"));
		panel.add(color);

		SpinnerDateModel dateModel = new SpinnerDateModel();
		date = new JSpinner(dateModel);
		panel.add(new JLabel("생일"));
		panel.add(date);

		getContentPane().add("North", panel);
		setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		setSize(400,300);
		setVisible(true);
	}

	public static void main(String args[])
	{
		new SpinnerTest();
	}
}

import java.util.*;
import java.awt.*;
import javax.swing.*;

public class IconCellRenderer extends DefaultListCellRenderer
{
	protected Hashtable icons;

	public IconCellRenderer()
	{
		icons = new Hashtable();
	}

	public Component getListCellRendererComponent(JList list, Object value, 
			int index, boolean isSelected, boolean cellHasFocus)
	{
		String text = value.toString();
		setText(text);

		if (!icons.containsKey(text))
		{
			ImageIcon img = new ImageIcon(text + ".gif");
			icons.put(text, img);
			setIcon(img);
		} else {
			setIcon((ImageIcon)icons.get(text));
		}

		if (isSelected = true)
		{
			setBackground(Color.white);
			setForeground(Color.blue);
		} else {
			setBackground(Color.lightGray);
			setForeground(Color.black);
		}
		return this;
	}
}

import java.awt.Color;
import javax.swing.*;

public class DeviceListCombo extends JFrame
{
	protected JList list;
	protected JComboBox combo;

	public DeviceListCombo()
	{
		super("아이콘을 갖는 리스트와 콤보");
		String[] data = {"Keyboard", "mouse", "joystick"};
		list = new JList(data);
		list.setBackground(Color.lightGray);
		list.setCellRenderer(new IconCellRenderer());
		getContentPane().add(new JScrollPane(list), "Center");

		combo = new JComboBox(data);
		combo.setRenderer(new IconCellRenderer());
		getContentPane().add(combo, "South");

		setDefaultCloseOperation(EXIT_ON_CLOSE);
		setSize(400,300);
		setVisible(true);
	}

	public static void main(String args[])
	{
		new DeviceListCombo();
	}
}

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;

public class JListComboBox extends JFrame implements ItemListener
{
	protected JList fruits;
	protected JComboBox colors;
	protected String items[] = {"apple", "orange", "banana", "pear"};
	public JListComboBox()
	{
		super("스윙 리스트와 콤보 박스");
		getContentPane().setLayout(new FlowLayout());

		fruits = new JList(items);
		fruits.addMouseListener(new MouseAdapter()
		{
			public void mouseClicked(MouseEvent e)
			{
				int index = fruits.locationToIndex(e.getPoint());
				if (e.getClickCount() == 1)
				{
					System.out.println(items[index]);
				} else if (e.getClickCount() == 2)
				{
					System.out.println("[" + items[index] + "]");
				}
			}
		});
		fruits.setVisibleRowCount(3);
		JScrollPane sp = new JScrollPane(fruits);

		colors = new JComboBox();
		colors.addItem("white");
		colors.addItem("blue");
		colors.addItem("green");
		colors.addItemListener(this);

		getContentPane().add(sp);
		getContentPane().add(colors);
		setDefaultCloseOperation(EXIT_ON_CLOSE);
		setSize(300,200);
		setVisible(true);
	}

	public void itemStateChanged(ItemEvent e)
	{
		Object o = e.getSource();
		if (o == colors)
		{
			if (e.getStateChange() == ItemEvent.SELECTED)
			{
				Object data = colors.getSelectedItem();
				System.out.println(data.toString());
			}
		}
	}

	public static void main(String args[])
	{
		JListComboBox jlc = new JListComboBox();
	}
}

import java.awt.*;
import javax.swing.*;

public class CountButtonModel extends DefaultButtonModel
{
	private int count;
	private JButton btn;

	public CountButtonModel(JButton btn)
	{
		this.btn = btn;
		btn.setModel(this);
	}

	public void setPressed(boolean b)
	{
		if(b) {
			count = ++count % 4;
			switch(count) {
				case 0:
					btn.setBackground(Color.lightGray);
					break;
				case 1:
					btn.setBackground(Color.green);
					break;
				case 2:
					btn.setBackground(Color.red);
					break;
				case 3:
					btn.setBackground(Color.yellow);
			}
		}
	}
}

import javax.swing.*;

public class ButtonModelTest extends JFrame
{
	JButton ok;

	public ButtonModelTest()
	{
		super("ButtonModel 테스트");
		ImageIcon rai = new ImageIcon("rai.gif");
		ok = new JButton("OK", rai);
		ok.setRolloverIcon(rai);
		ok.setPressedIcon(rai);
		CountButtonModel model = new CountButtonModel(ok);

		getContentPane().add("South",ok);
		setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		setSize(400,300);
		setVisible(true);
	}

	public static void main(String args[])
	{
		new ButtonModelTest();
	}
}

/*
1. 다음과 같은 형태의 GUI 화면을 작성하라.
메뉴 아이템과 버튼을 클릭하는 경우에 메시지가
출력된다. 예를들어, New 버튼을 클릭하는 경우에
"New"라는 메시지가 출력되어야 한다.
두 개의 버튼은 JToolBar에 붙인다.
*/

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;

public class MenuTest extends JFrame implements ActionListener {
	JMenuBar bar;
	JMenu file, style, edit, help;
	JMenuItem fileNew, fileOpen, fileExit;
	JToolBar toolBar;
	JButton btNew, btOpen;

	public MenuTest() {
		super("실습 테스트");
		makeMenu();
		makeBody();

		getContentPane().setLayout(null);
		toolBar.setSize(100,40);
		toolBar.setLocation(0,0);
		getContentPane().add(toolBar);

		setDefaultCloseOperation(EXIT_ON_CLOSE);
		setSize(400, 300);
		setVisible(true);
	}

	protected void makeMenu() {
		bar = new JMenuBar();
		file = new JMenu("File");
		file.setMnemonic('F');
		edit = new JMenu("Edit");
		edit.setMnemonic('E');
		help = new JMenu("Help");
		help.setMnemonic('H');

		fileNew = new JMenuItem("New");
		fileNew.addActionListener(this);
		file.add(fileNew);
		fileOpen = new JMenuItem("Open");
		fileOpen.addActionListener(this);
		file.add(fileOpen);
		file.addSeparator();
		fileExit = new JMenuItem("Exit");
		fileExit.addActionListener(this);
		file.add(fileExit);

		bar.add(file);
		bar.add(edit);
		bar.add(help);
		setJMenuBar(bar);
	}

	protected void makeBody() {
		setLayout(new FlowLayout());
		toolBar = new JToolBar();
		btNew = new JButton("New");
		btNew.addActionListener(this);
		btOpen = new JButton("Open");
		btOpen.addActionListener(this);
		toolBar.add(btNew);
		toolBar.add(btOpen);
	}

	public void actionPerformed(ActionEvent e) {
		Object o = e.getSource();
		if(o == fileNew) {
			System.out.println("New");
		} else if(o == fileOpen) {
			System.out.println("Open");
		} else if(o == fileExit) {
			System.out.println("Exit");
		} else if(o == btNew) {
			System.out.println("New");
		} else if(o == btOpen) {
			System.out.println("Open");
		}
	}

	public static void main(String args[]) {
		new MenuTest();
	}
}

/*
2. 계산기 모양의 GUI 프로그램을 작성하라.
*/

import java.awt.*;
import javax.swing.*;

public class cal extends JFrame {
	JButton bt_num0,bt_num1,bt_num2,bt_num3,bt_num4,bt_num5,bt_num6,bt_num7,bt_num8,bt_num9;
	JButton bt_op0,bt_op1,bt_op2,bt_op3,bt_op4,bt_op5,bt_op6;
	JButton bt_backspace,bt_ce,bt_c;
	TextField text;
	Panel p1,p2,p3,p4,p5;
	
    public cal()
	{
        super("계산기 모양의 GUI");
		getContentPane().setLayout(new GridLayout(6,1));

		text = new TextField();
		bt_num1 = new JButton("1");
		bt_num2 = new JButton("2");
		bt_num3 = new JButton("3");
		bt_num4 = new JButton("4");
		bt_num5 = new JButton("5");
		bt_num6 = new JButton("6");
		bt_num7 = new JButton("7");
		bt_num8 = new JButton("8");
		bt_num9 = new JButton("9");
		bt_num0 = new JButton("0");
		bt_op1 = new JButton("/");
		bt_op2 = new JButton("*");
		bt_op3 = new JButton("-");
		bt_op4 = new JButton("+");
		bt_op5 = new JButton(".");
		bt_op6 = new JButton("=");
		bt_backspace = new JButton("Backspace");
		bt_ce = new JButton("Ce");
		bt_c = new JButton("C");

		p1 = new Panel(new FlowLayout());
		p2 = new Panel(new FlowLayout());
		p3 = new Panel(new FlowLayout());
		p4 = new Panel(new FlowLayout());
		p5 = new Panel(new FlowLayout());

		p1.add(bt_num0);
		p1.add(bt_op4);
		p1.add(bt_op5);
		p1.add(bt_op6);

		p2.add(bt_num1);
		p2.add(bt_num2);
		p2.add(bt_num3);
		p2.add(bt_op3);

		p3.add(bt_num4);
		p3.add(bt_num5);
		p3.add(bt_num6);
		p3.add(bt_op2);

		p4.add(bt_num7);
		p4.add(bt_num8);
		p4.add(bt_num9);
		p4.add(bt_op1);

		p5.add(bt_backspace);
		p5.add(bt_ce);
		p5.add(bt_c);
		
		getContentPane().add(text);
		getContentPane().add(p5);
		getContentPane().add(p4);
		getContentPane().add(p3);
		getContentPane().add(p2);
		getContentPane().add(p1);
		
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        setSize(225, 250);
        setVisible(true);
    }

    public static void main(String args[]) {
        cal ct = new cal();
    }
}

/*
3. 2번에서 작성한 계산기에서 버튼을 클릭하면
클릭한 숫자가 화면에 출력되도록 기능을 추가하라.
*/

import java.awt.*;
import java.awt.event.*; // evnet 
import javax.swing.*;

public class calPlus extends JFrame implements ActionListener { // 아이템 리스너 인터페이스
	JButton bt_num0,bt_num1,bt_num2,bt_num3,bt_num4,bt_num5,bt_num6,bt_num7,bt_num8,bt_num9;
	JButton bt_op0,bt_op1,bt_op2,bt_op3,bt_op4,bt_op5,bt_op6;
	JButton bt_backspace,bt_ce,bt_c;
	TextField text;
	Panel p1,p2,p3,p4,p5;
	
    public calPlus()
	{
        super("계산기 모양의 GUI");
		getContentPane().setLayout(new GridLayout(6,1)); //그리드 레이아웃

		text = new TextField();
		bt_num1 = new JButton("1");
		bt_num1.addActionListener(this); // 이벤트 리스너 등록
		bt_num2 = new JButton("2");
		bt_num2.addActionListener(this);
		bt_num3 = new JButton("3");
		bt_num3.addActionListener(this);
		bt_num4 = new JButton("4");
		bt_num4.addActionListener(this);
		bt_num5 = new JButton("5");
		bt_num5.addActionListener(this);
		bt_num6 = new JButton("6");
		bt_num6.addActionListener(this);
		bt_num7 = new JButton("7");
		bt_num7.addActionListener(this);
		bt_num8 = new JButton("8");
		bt_num8.addActionListener(this);
		bt_num9 = new JButton("9");
		bt_num9.addActionListener(this);
		bt_num0 = new JButton("0");
		bt_num0.addActionListener(this);
		bt_op1 = new JButton("/");
		bt_op2 = new JButton("*");
		bt_op3 = new JButton("-");
		bt_op4 = new JButton("+");
		bt_op5 = new JButton(".");
		bt_op6 = new JButton("=");
		bt_backspace = new JButton("Backspace");
		bt_ce = new JButton("Ce");
		bt_c = new JButton("C");

		p1 = new Panel(new FlowLayout()); //플로우레이아웃 형태로 패널 묶음
		p2 = new Panel(new FlowLayout());
		p3 = new Panel(new FlowLayout());
		p4 = new Panel(new FlowLayout());
		p5 = new Panel(new FlowLayout());

		p1.add(bt_num0);
		p1.add(bt_op4);
		p1.add(bt_op5);
		p1.add(bt_op6);

		p2.add(bt_num1);
		p2.add(bt_num2);
		p2.add(bt_num3);
		p2.add(bt_op3);

		p3.add(bt_num4);
		p3.add(bt_num5);
		p3.add(bt_num6);
		p3.add(bt_op2);

		p4.add(bt_num7);
		p4.add(bt_num8);
		p4.add(bt_num9);
		p4.add(bt_op1);

		p5.add(bt_backspace);
		p5.add(bt_ce);
		p5.add(bt_c);
		
		getContentPane().add(text);
		getContentPane().add(p5);
		getContentPane().add(p4);
		getContentPane().add(p3);
		getContentPane().add(p2);
		getContentPane().add(p1);
		
        setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        setSize(225, 250);
        setVisible(true);
    }
	// ActionEvent 추가
	public void actionPerformed(ActionEvent e) {
		String st = e.getActionCommand();
		if (st == "1") text.setText("1");
		if (st == "2") text.setText("2");
		if (st == "3") text.setText("3");
		if (st == "4") text.setText("4");
		if (st == "5") text.setText("5");
		if (st == "6") text.setText("6");
		if (st == "7") text.setText("7");
		if (st == "8") text.setText("8");
		if (st == "9") text.setText("9");
		if (st == "0") text.setText("0");
	}

    public static void main(String args[]) {
        calPlus ct = new calPlus();
    }
}

import java.awt.*;
import javax.swing.*;

public class DefinedCursor extends JFrame
{
	Cursor cursor;
	Image img;

	public DefinedCursor()
	{
		super("사용자가 정의하는 커서");

		Toolkit tk = Toolkit.getDefaultToolkit();
		img = tk.getImage("horse.gif");
		Point point = new Point(0,0);
		cursor = tk.createCustomCursor(img, point, "horse");
		setCursor(cursor);

		setDefaultCloseOperation(EXIT_ON_CLOSE);
		setSize(400, 300);
		setVisible(true);
	}

	public static void main(String args[])
	{
		new DefinedCursor();
	}
}

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;

public class CheckTest extends JFrame implements ItemListener
{
	protected JCheckBox java,cpp;
	protected JRadioButton single, married;

	public CheckTest()
	{
		super("체크 테스트");
		getContentPane().setLayout(new GridLayout(4,1));
		getContentPane().add(new JLabel("좋아하는 언어는"));
		JPanel top = new JPanel();
		java = new JCheckBox("Java");
		java.addItemListener(this);
		cpp = new JCheckBox("C++");
		cpp.addItemListener(this);
		top.add(java);
		top.add(cpp);
		getContentPane().add(top);

		getContentPane().add(new JLabel("결혼 여부"));
		JPanel bottom = new JPanel();
		ButtonGroup bg = new ButtonGroup();
		single = new JRadioButton("미혼");
		single.addItemListener(this);
		bottom.add(single);
		bg.add(single);
		married = new JRadioButton("기혼");
		married.addItemListener(this);
		bottom.add(married);
		bg.add(married);
		getContentPane().add(bottom);

		setDefaultCloseOperation(EXIT_ON_CLOSE);
		setSize(400, 300);
		setVisible(true);
	}

	public void itemStateChanged(ItemEvent e)
	{
		Object o = e.getSource();
		int type = e.getStateChange();

		if (o == java)
		{
			if (type == ItemEvent.SELECTED)
			{
				System.out.println("JAVA 선택");
			}else {
				System.out.println("JAVA 선택 해제");
			}
		} else if (o == cpp) {
			if (type == ItemEvent.SELECTED)
			{
				System.out.println("C++ 선택");
			}else {
				System.out.println("C++ 선택 해제");
			}
		} else if (o == single) {
			if (type == ItemEvent.SELECTED)
			{
				System.out.println("미혼 선택");
			}
		} else if (o == married) {
			if (type == ItemEvent.SELECTED)
			{
				System.out.println("기혼 선택");
			}
		}
	}

	public static void main(String args[])
	{
		new CheckTest();
	}
}

import java.awt.*;
import javax.swing.*;

public class JLabelButton extends JFrame
{
	protected JButton textB, iconB;
	protected JLabel label;

	public JLabelButton() {
		super("스윙 버튼과 라벨");
		getContentPane().setLayout(new FlowLayout());

		ImageIcon logo = new ImageIcon("logo.gif");
		label = new JLabel("자바 듀크", logo, JLabel.RIGHT);
		label.setBorder(BorderFactory.createTitledBorder("label"));
		getContentPane().add(label);

		textB = new JButton("버튼");
		getContentPane().add(textB);

		ImageIcon surf = new ImageIcon("surf.gif");
		iconB = new JButton("", surf);
		iconB.setPressedIcon(new ImageIcon("surf2.gif"));
		iconB.setBorder(BorderFactory.createEtchedBorder());
		iconB.setToolTipText("서핑 듀크");
		getContentPane().add(iconB);

		setDefaultCloseOperation(EXIT_ON_CLOSE);
		setSize(270, 180);
		setVisible(true);
	}

	public static void main(String args[])
	{
		JLabelButton jlb = new JLabelButton();
	}
}

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;

public class ButtonEvent extends JFrame implements ActionListener
{
	protected JButton ok;

	public ButtonEvent()
	{
		super("버튼 이벤트");

		ok = new JButton("ok");
		ok.addActionListener(this);
		getContentPane().add(ok, BorderLayout.SOUTH);

		setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		setSize(300,200);
		setVisible(true);
	}

	public void actionPerformed(ActionEvent e)
	{
		Object o = e.getSource();
		if (o == ok)
		{
			System.out.println("OK");
		}
	}

	public static void main(String args[])
	{
		ButtonEvent be = new ButtonEvent();
	}
}

import java.awt.event.*;
import javax.swing.*;

public class MenuTest extends JFrame implements ActionListener {
	JMenuBar bar;
	JMenu file,style;
	JMenuItem fileNew;
	JCheckBoxMenuItem num;
	JRadioButtonMenuItem dos, unix;

	public MenuTest() {
		super("메뉴 테스트");
		makeMenu();
		makeBody();
		setDefaultCloseOperation(EXIT_ON_CLOSE);
		setSize(400,300);
		setVisible(true);
	}

	protected void makeMenu() {
		bar = new JMenuBar();
		file = new JMenu("File");
		file.setMnemonic('F');
		fileNew = new JMenuItem("New");
		fileNew.addActionListener(this);
		file.add(fileNew);
		file.addSeparator();

		num = new JCheckBoxMenuItem("Line Number");
		num.addActionListener(this);
		style = new JMenu("Style");
		file.add(num);
		file.add(style);

		dos = new JRadioButtonMenuItem("DOS Style", true);
		dos.addActionListener(this);
		unix = new JRadioButtonMenuItem("UNIX Style");
		unix.addActionListener(this);
		ButtonGroup bg = new ButtonGroup();
		bg.add(dos);
		bg.add(unix);
		style.add(dos);
		style.add(unix);

		bar.add(file);
		setJMenuBar(bar);
	}

	protected void makeBody() {
		//GUI 몸체 부분을 정의한다.
	}

	public void actionPerformed(ActionEvent e) {
		Object o = e.getSource();
		if (o == fileNew){
			System.out.println("New");
		}else if (o == num){
			if (num.isSelected())
				System.out.println("Line Number");
		}else if (o == dos){
			System.out.println("DOS");
		}else if (o == unix){
			System.out.println("UNIX");
		}
	}

	public static void main(String args[]){
		new MenuTest();
	}
}

import java.awt.*;
import javax.swing.*;

public class IconTest extends JFrame
{
	Image logo;

	public IconTest()
	{
		super("학교 로고");
		Toolkit tk = Toolkit.getDefaultToolkit();
		logo = tk.getImage("logo.gif");
		setIconImage(logo);

		setDefaultCloseOperation(EXIT_ON_CLOSE);
		setSize(200,150);
		setVisible(true);
	}

	public static void main(String args[])
	{
		IconTest it = new IconTest();
	}
}

import javax.swing.*;

public class JFrameTest extends JFrame
{
	public JFrameTest()
	{
		super("스윙 JFrame 테스트");
		setDefaultCloseOperation(EXIT_ON_CLOSE);
		setSize(300,200);
		setVisible(true);
	}

	public static void main(String args[])
	{
		JFrameTest jf = new JFrameTest();
	}
}

import java.awt.*;
import javax.swing.*;

public class SixButtons extends JFrame
{
	protected JButton one, two, three, four, five, six;

	public SixButtons()
	{
		super("플로우 레이아웃");
		getContentPane().setLayout(new FlowLayout());
		one = new JButton("One");
		two = new JButton("Two");
		three = new JButton("Three");
		four = new JButton("Four");
		five = new JButton("Five");
		six = new JButton("Six");

		getContentPane().add(one);
		getContentPane().add(two);
		getContentPane().add(three);
		getContentPane().add(four);
		getContentPane().add(five);
		getContentPane().add(six);

		setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		setSize(300, 200);
		setVisible(true);
	}

	public static void main(String args[])
	{
		SixButtons sb = new SixButtons();
	}
}

import java.awt.*;
import javax.swing.*;

public class FiveButtons extends JFrame
{
	protected JButton b1, b2, b3, b4, b5;

	public FiveButtons()
	{
		super("보더 레이아웃");
		b1 = new JButton("Center");
		b2 = new JButton("South");
		b3 = new JButton("North");
		b4 = new JButton("West");
		b5 = new JButton("East");

		getContentPane().add(b1, BorderLayout.CENTER);
		getContentPane().add(b2, BorderLayout.SOUTH);
		getContentPane().add(b3, BorderLayout.NORTH);
		getContentPane().add(b4, BorderLayout.WEST);
		getContentPane().add(b5, BorderLayout.EAST);

		setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		setSize(300,200);
		setVisible(true);
	}

	public static void main(String args[])
	{
		FiveButtons fb = new FiveButtons();
	}
}

import java.awt.*;
import javax.swing.*;

public class FourButtons extends JFrame
{
	protected JButton b1, b2, b3, b4;

	public FourButtons()
	{
		super("그리드 레이아웃");
		getContentPane().setLayout(new GridLayout(2,2));

		b1 = new JButton("One");
		b2 = new JButton("Two");
		b3 = new JButton("Three");
		b4 = new JButton("Four");

		getContentPane().add(b1);
		getContentPane().add(b2);
		getContentPane().add(b3);
		getContentPane().add(b4);

		setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
		setSize(300,200);
		setVisible(true);
	}

	public static void main(String args[])
	{
		FourButtons fb = new FourButtons();
	}
}

import java.awt.*;
import javax.swing.*;

public class SimpleGridBag extends JFrame {
	JButton b1,b2,b3,b4,b5,b6;

	public SimpleGridBag() {
		super("SimpleGridBag");
		GridBagLayout gridbag = new GridBagLayout();
		GridBagConstraints constraint = new GridBagConstraints();
		getContentPane().setLayout(gridbag);

		constraint.fill = GridBagConstraints.BOTH;
		constraint.weightx = 1.0;
		constraint.weighty = 1.0;
		b1 = new JButton("Button1");
		gridbag.setConstraints(b1, constraint);
		getContentPane().add(b1);

		b2 = new JButton("Button2");
		gridbag.setConstraints(b2, constraint);
		getContentPane().add(b2);

		constraint.gridwidth = GridBagConstraints.REMAINDER;
		b3 = new JButton("Button3");
		gridbag.setConstraints(b3, constraint);
		getContentPane().add(b3);

		constraint.gridwidth = 1;
		constraint.gridheight = 2;
		b4 = new JButton("Button4");
		gridbag.setConstraints(b3, constraint);
		getContentPane().add(b4);

		constraint.gridwidth = GridBagConstraints.REMAINDER;
		constraint.gridheight = 1;
		constraint.weighty = 1.0;
		b5 = new JButton("Button5");
		gridbag.setConstraints(b5, constraint);
		getContentPane().add(b5);

		b6 = new JButton("Button6");
		gridbag.setConstraints(b6, constraint);
		getContentPane().add(b6);

		setDefaultCloseOperation(EXIT_ON_CLOSE);
		setSize(400,200);
		setVisible(true);
	}

	public static void main(String args[])
	{
		new SimpleGridBag();
	}
}

/* 0으로 나누었을 때 발생할 수 있는 DivideByZeroException라는 예외 클래스를 작성하라.
이 예외는 Exception으로부터 상속받는 체크 예외 클래스이다. */

import java.util.Scanner;

public class ZeroExcute
{
	public static void main(String args[])
	{
		int inNum; // 숫자를 입력받을 변수
		Scanner scan = new Scanner (System.in);
		System.out.println("숫자를 입력하세요.");
		inNum = scan.nextInt();

		Zero z = new Zero(); // Zero 객체 생성

		try
		{
			z.check(inNum); // Zero.java check(int num)로 값 전달
		}
		catch (DivideByZeroException e)
		{
			e.printStackTrace();
			// DivideByZeroException 예외발생시
			// 현재 throwable과 트레이스 정보를 표준 에러로 출력
		}
	}
}

// throw를 이용한 예외 발생 클래스 작성

public class Zero
{
	private long result; //결과값이 저장될 변수

	public void check(int num) throws DivideByZeroException
	{
		if (num == 0)
		{
			throw new DivideByZeroException(); //입력받은 숫자가 0이면 예외 발생
		}else{
			result = 10000 / num;
			System.out.println("결과 : " + result);
		}
	}
}

// Exception으로부터 상속받는 체크 예외 클래스 DivideByZeroException 작성

public class DivideByZeroException extends Exception
{
	public DivideByZeroException()
	{
		super("0으로 나눌 수 없습니다.");
	}
}

DivideByZeroException.java

Zero.java

ZeroExcute.java

public class BalanceOutOfBoundsException extends Exception
{
	public BalanceOutOfBoundsException()
	{
		super("잔액을 초과하였습니다.");
	}
}

public class MalformedData extends RuntimeException
{
	public MalformedData()
	{
		super("데이터 포맷이 잘못되었습니다.");
	}
}

public class Account
{
	private long balance;
	private String name;

	public Account(String name)
	{
		this.name = name;
	}

	public void deposit(int amount) throws MalformedData
	{
		if (amount <= 0)
		{
			throw new MalformedData();
		}
		balance = balance + amount;
	}

	public void withdraw(int amount) throws BalanceOutOfBoundsException, MalformedData
	{
		if (amount <=0)
		{
			throw new MalformedData();
		}

		if (balance < amount)
		{
			throw new BalanceOutOfBoundsException();
		}

		balance = balance - amount;
	}

	public void check()
	{
		System.out.println(name + " : " + balance);
	}
}

public class Bank
{
	public static void main(String args[])
	{
		Account hong = new Account("홍길동");
		hong.deposit(10000);
		//hong.deposit(-100); //MalformedData 예외 발생
		try
		{
			hong.withdraw(5000);
			//hong.withdraw(-50); //MalformedData 예외 발생
		}
		catch (BalanceOutOfBoundsException be)
		{
			be.printStackTrace();
		}
		catch (MalformedData me)
		{
			me.printStackTrace();
		}
		hong.check();
		
		//try
		//{
		//	hong.withdraw(10000); // BalanceOutOfBoundsException 예외 발생
		//}
		//catch (BalanceOutOfBoundsException be)
		//{
		//	be.printStackTrace();
		//}
	}
}

#include <stdio.h>
#include <stdlib.h>

//동적 배열

typedef unsigned int UNINT;
void sum(UNINT n);

void main()
{
	UNINT max;

	puts("배열 사이즈 입력 :");
	scanf("%d",&max);

	sum(max);
}

void sum(UNINT n)
{
	UNINT i;
	UNINT *ptd;

	ptd = (UNINT *) malloc(n * sizeof (UNINT));

	if (ptd == NULL)
	{
		puts("메모리 확보 실패");
		exit(0);
	}

    	puts("\n출력 :");
	for (i=0; i < n; i++)
	{
		*ptd=i+1;
		printf("값=%d\n", *ptd++);
	}
	free(ptd);
}

#include <stdio.h>
#include <process.h>

FILE *ifp, *ofp;

void main()
{
	int i;
	float n[4];
	float sum,ave,max,min;

	ifp = fopen("ex_in.txt","r");
	ofp = fopen("ex_out.txt","w");

	if (ifp==NULL)
	{
		printf("파일 열기 실패 입니다.\n");
		exit(0);
	}

	fprintf(ofp,"합계\t평균\t최고값\t최소값\n");
	while (!feof(ifp))
	{
		fscanf(ifp,"%f %f %f %f",&n[0],&n[1],&n[2],&n[3]);
		sum = n[0] + n[1] + n[2] + n[3];
		ave = sum / 4.0;
		max = n[0];
		min = n[0];
		for (i=0;i<4;i++)
		{
			if (max < n[i])
			{
				max = n[i];
			}

			if (min > n[i])
			{
				min = n[i];
			}
		}
		fprintf(ofp,"%.1f\t%.1f\t%.1f\t%.1f\n",sum,ave,max,min);
	}

	fclose(ifp), fclose(ofp);
}

 ex01.cpp
 ex_in.txt
 ex_out.txt

/*
구조체 실습 예제 2번
*/

#include <stdio.h>
struct student{
	char name[10];
	int c,cpp,vc,rank;
	int tot;
};
void sum(struct student *pst, int n);
void sort(struct student *pst, int n);
void show(struct student *pst, int n);

void main()
{
	struct student st[4]={
	{"홍길동",90,90,90,1,0},
	{"지흔이",80,89,70,1,0},
	{"김진수",70,73,80,1,0},
    	{"박순이",60,87,80,1,0},
	};

	sum(st,4);
	sort(st,4);
	show(st,4);
}

void sum(struct student *pst, int n)
{
	for(int i=0;i<n;i++)
	{
		pst[i].tot = pst[i].c + pst[i].cpp + pst[i].vc;
	}

}

void sort(struct student *pst, int n)
{
	struct student temp;
	for(int i=0;i<n;i++)
	{
		for(int j=0;j<n;j++)
		{
			if(pst[i].tot < pst[j].tot)
			{
				pst[i].rank++;
			}
			if(pst[i].rank < pst[j].rank)
			{
				temp=pst[i];
				pst[i]=pst[j];
				pst[j]=temp;
			}
		}
	}
}

void show(struct student *pst, int n)
{
	printf("이  름 | C  | C++| VC | 총점| 석차\n");
	printf("---------------------------------\n");
	for(int i=0;i<n;i++)
	{
		printf("%s | %d | %d | %d | %d | %d\n",pst[i].name,pst[i].c,pst[i].cpp,pst[i].vc,pst[i].tot,pst[i].rank);
	}
}

 ex_struct.cpp