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Java内部窗体设计与窗体定位

import javax.swing.*;

import java.awt.*;

import java.awt.event.*;

import javax.swing.UIManager;

class Mywindow extends JFrame

{

JButton button1;

JButton button2;

JInternalFrame interframe1,interframe2;

JPanel jpanel;

Mywindow()

{

setVisible(true);

//setSize(400,400)见下面的阐明!

jpanel=(JPanel)this.getContentPane();

jpanel.setLayout(new GridLayout(1,2));

button1=new JButton("我");

button2=new JButton("你");

//------------------------------------------------------

interframe1=new JInternalFrame("内窗体A",true,true,true,true);

interframe1.setSize(150,250);

interframe1.setVisible(true); // 必须加上此句 !否则内部窗体无法 !

interframe1.getContentPane().add(button1);

JDesktopPane desk1=new JDesktopPane();

desk1.add(interframe1);

jpanel.add(desk1);

//----------------------------------------------------

interframe2=new JInternalFrame("内窗体B",true,true,true,true);

interframe2.setSize(150,250);

interframe2.setVisible(true);

interframe2.getContentPane().add(button2,BorderLayout.CENTER);

interframe2.getContentPane().add( new JLabel("你好啊"),BorderLayout.NORTH);

JDesktopPane desk2=new JDesktopPane();

desk2.add(interframe2);

jpanel.add(desk2);

}

//--------------------------------------------------------

public Dimension getPreferredSize()

{

return new Dimension(500,500);

/*留意:这种要领设置窗体大年夜小显示的效果更好!

*假如直接这样设置setSize(400,400)大年夜小 ,效果不好

* 建议初学者测试!

*/

}

}

public class interframe

{

public static void main(String args[])

{ Mywindow win=new Mywindow();

win.pack();

// win.setVisible(true); 假如有此句,内部窗体不显示!

// win.setSize(new Dimension(400,400));

Dimension screenSize = Toolkit.getDefaultToolkit().getScreenSize();

Dimension frameSize = win.getSize();

if (frameSize.height > screenSize.height)

{

frameSize.height = screenSize.height;

}

if (frameSize.width > screenSize.width)

{

frameSize.width = screenSize.width;

}

win.setLocation((screenSize.width - frameSize.width) / 2, (screenSize.height - frameSize.height) / 2);

win.addWindowListener(new WindowAdapter()

{

public void windowClosing(WindowEvent e)

{System.exit(0);}

});

}

}

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