kk Blog —— 通用基础


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Java Mune & Button

Java Mune & Button

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//package java_menu;
import java.awt.*;
import java.awt.event.*;

class BBB extends Button
{
	private int tt=0;
	public BBB() {
		super("0");
		addMouseListener( new MouseListener() {
			public void mousePressed(MouseEvent e) {
				setLabel(String.valueOf((++tt)));
			}
			public void mouseExited(MouseEvent e) {}
			public void mouseReleased(MouseEvent e) {}
			public void mouseEntered(MouseEvent e) {}
			public void mouseClicked(MouseEvent e) {}
		});
		int x=(int)(Math.random()*10000), y=(int)(Math.random()*10000);
		setBounds( x % 500+70, y % 300+70, 70, 70);
		show();
	}
}

class MenuExam extends Frame
{
	public MenuExam()
	{
		super("abcdxyzk");
		MenuBar bar = new MenuBar(); setMenuBar(bar);
		Menu bb = new Menu(" bbb ");
		MenuItem b1 = new MenuItem(" b1 ");
		MenuItem b2 = new MenuItem(" b2 ");
		bb.add(b1); bb.addSeparator(); bb.add(b2); bar.add(bb);

		b2.addActionListener( new ActionListener() {
			public void actionPerformed(ActionEvent e) {
				BBB bbb = new BBB();
				add(bbb);
			}
		});
		setLayout(null);   setSize(700, 500);
		TextField tf = new TextField();
		tf.setText("click b2");
		tf.setFont(new Font("TimesRoman", Font.BOLD, 30));
		tf.setEnabled(false);
		tf.setBounds(100, 350, 200, 100);
		add(tf);
		show();
	}
}

public class Main {
	public static void main(String[] args) {
		MenuExam mm = new MenuExam();
		mm.addWindowListener( new WindowAdapter() {
			public void windowClosing(WindowEvent e) {
				System.exit(0);
			}
		});
	}
}

Java WindowListener & ActionListener

Java WindowListener & ActionListener

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//package java_window;
import java.awt.*;
import java.awt.event.*;

class Window
{
	Frame fra = new Frame();
	public static int tt = 1;
	public static Label lb = new Label(" label ");
	public void go() {
		fra.addWindowListener(
			new WindowAdapter(){
			public void windowClosing(WindowEvent e) {
				System.exit(0);
			}
		});
		fra.setSize(700, 550);
		fra.setLayout(null);
		Button but = new Button(" OK ");
		but.setBounds(200, 200, 100, 70); fra.add(but);
		lb.setBounds(200, 300, 200, 100);  fra.add(lb);

		but.addActionListener(
			new ActionListener() {
			public void actionPerformed(ActionEvent event) {
				 lb.setText("ActionEvent "+event.getActionCommand()+"   "+(tt++));
			}
		});
		fra.show();
	}
}

public class Main {
	public static void main(String[] args) {
		Window win = new Window();
		win.go();
	}
}

Java KeyListener 的使用

Java KeyListener 的使用

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//package java_key;
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;

class KeyWork extends JFrame implements KeyListener
{
	private JLabel status;
	public KeyWork()
	{
		super("abcd");
		status = new JLabel();
		status.setFont(new Font("TimesRoman", Font.BOLD, 50));
		getContentPane().add(status, BorderLayout.CENTER);
		addKeyListener(this);
		setSize(700,500);
		show();
	}
	public void keyPressed(KeyEvent e) {
		char ch = e.getKeyChar();
		status.setText(String.valueOf(ch) + "   " +(int)ch);
	}
	public void keyTyped(KeyEvent e) {
	   
	}
	public void keyReleased(KeyEvent e) {
	   
	}
}

public class Main {
	public static void main(String[] args) {
		KeyWork app = new KeyWork();
		app.addWindowListener(new WindowAdapter(){
			public void windowClosing(WindowEvent e) {
				System.exit(0);
			}
		});
	}
}