Java基礎入門(25天) 畢向東

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1. Java為GUI提供的物件都存在java.Awt和javax.Swing包裡.

java.Awt, abstract window tookit, 抽象視窗工具包. 呼叫本地系統方法實現功能, 屬重量級控制元件.

javax.Swing, 在AWT基礎上, 簡歷的一淘圖形介面系統, 有更多元件. 完全由Java實現, 增強了移植性, 輕量級控制元件.

2. **重量級呼叫系統方法, 與系統更相關. 輕量級與系統依賴性弱, 移植性強.

3.

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

public class MouseAndKeyEvent
{
private Frame f;
private Button but;

public MouseAndKeyEvent()
{
init();
}

public void init()
{
f = new Frame("my frame");
f.setBounds(300,100,600,500);
f.setLayout(new FlowLayout());

but = new Button("my button");

f.add(but);

myEvent();

f.setVisible(true);
}

private void myEvent()
{
f.addWindowListener(new WindowAdapter()
{
public void windowClosing(WindowEvent e)
{
System.exit(0);
}
});

/*but.addActionListener(new ActionListener()
{
public void actionPerformed(ActionEvent e)
{
System.out.println("button do it");
System.exit(0);
}
});*/

but.addMouseListener(new MouseAdapter()
{
private int count = 1;
private int clickCount = 1;
public void mouseEntered(MouseEvent e)
{
System.out.println("滑鼠進入該元件" + count++);
}
public void mouseClicked(MouseEvent e)
{
if(e.getClickCount() == 2)
System.out.println("雙擊動作 " + clickCount++);
}
});

but.addKeyListener(new KeyAdapter()
{
public void keyPressed(KeyEvent e)
{
System.out.println(e.getKeyChar());
}
});
}

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

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