gridbaglayoutdemo.java

《Java语言程序设计》源代码 很好的JAVA入门的好的代码

import java.awt.*;
import javax.swing.*;
public class GridBagLayoutDemo extends JFrame
{
	public GridBagLayoutDemo()
	{   //创建网袋布局类对象、空间限制类对象，设置布局
		super("GridBagLayout布局");
		Container c=getContentPane();
		GridBagLayout gbl=new GridBagLayout();
		GridBagConstraints gbc=new GridBagConstraints();
		c.setLayout(gbl);
		//创建按钮b1,为其添加空间限制
		JButton b1=new JButton("button1");
		gbc.fill=GridBagConstraints.BOTH;
		gbc.weightx=1.0;
		gbc.weighty=1.0;
		gbl.setConstraints(b1,gbc);
		c.add(b1);
		//创建按钮b2,为其添加空间限制
		JButton b2=new JButton("button2");
		gbc.gridwidth=GridBagConstraints.REMAINDER;
		gbl.setConstraints(b2,gbc);
		c.add(b2);
		//创建按钮b3,为其添加空间限制
		JButton b3=new JButton("button3");
		gbc.weightx=0.0;
		gbl.setConstraints(b3,gbc);
		c.add(b3);
		//创建按钮b4,为其添加空间限制
		JButton b4=new JButton("button4");
		gbc.gridwidth=1;
		gbc.gridheight=2;
		gbl.setConstraints(b4,gbc);
		c.add(b4);
		//创建按钮b5,为其添加空间限制
		JButton b5=new JButton("button5");
		gbc.gridwidth=GridBagConstraints.REMAINDER;
		gbc.gridheight=1;
		gbl.setConstraints(b5,gbc);
		c.add(b5);
		//创建按钮b6,为其添加空间限制
		JButton b6=new JButton("button6");
		gbc.gridwidth=GridBagConstraints.REMAINDER;
		gbc.gridheight=1;
		gbl.setConstraints(b6,gbc);
		c.add(b6);
} 
    public static void main(String args[])
    {
    	JFrame frame=new GridBagLayoutDemo();
    	frame.setSize(200,150);
    	frame.setVisible(true);
    }
}