swing常用的布局

常用的布局有

1.流布局

2.边界布局

3.网格布局

4.卡片布局

5.网格包布局

测试代码：

public class TestOne {
	private JButton[] button=new JButton[5];
	public static void main(String[] args) {
		TestOne t=new TestOne();
		JFrame frame=new JFrame();
		frame.setBounds(400, 10, 1000, 1000);
		t.testFlowLayOut(frame);
		t.testBorderLayOut(frame);
		t.testGridLayOut(frame);
		t.testCardLayOut(frame);
		t.testGridBagLayOut(frame);
		frame.setVisible(true);
		frame.setDefaultCloseOperation(frame.EXIT_ON_CLOSE);
	}
	/**
	 * 流布局
	 * @param frame
	 */
	public void testFlowLayOut(JFrame frame){
		frame.setLayout(new FlowLayout());
		for(int i=0;i<5;i++){
			button[i]=new JButton("按钮"+i);
			frame.add(button[i]);
		}
	}	
	/**
	 * 边框布局
	 * @param frame
	 */
	public void testBorderLayOut(JFrame frame){
		frame.setLayout(new BorderLayout());
		for(int i=0;i<5;i++){
			button[i]=new JButton("按钮"+i);
		}
		frame.add(button[0],"North");
		frame.add(button[1],"West");
		frame.add(button[2],"East");
		frame.add(button[3],"South");
		frame.add(button[4],"Center");
	}
	/**
	 * 网格布局
	 * @param frame
	 */
	public void testGridLayOut(JFrame frame){
		frame.setLayout(new GridLayout(3, 2));
		for(int i=0;i<5;i++){
			button[i]=new JButton("按钮"+i);
			frame.add(button[i]);
		}
	}
	/**
	 * 卡片布局
	 * @param frame
	 */
	public void testCardLayOut(JFrame frame){
		frame.setLayout(new BorderLayout());
		JPanel pan1=new JPanel();
		JPanel pan2=new JPanel();
		JPanel pan3=new JPanel();
		JPanel pan4=new JPanel();
		JPanel pan5=new JPanel();
		CardLayout card=new CardLayout();
		pan2.setLayout(card);
		frame.add(pan1,"North");
		frame.add(pan2,"Center");
		for(int i=0;i<3;i++){
			button[i]=new JButton("按钮"+i);
			pan1.add(button[i]);
		}
		pan2.add(pan3, "1");
		JLabel lb1=new JLabel("Panel   1");
		pan3.add(lb1);
		pan2.add(pan4, "2");
		JLabel lb2=new JLabel("Panel   2");
		pan4.add(lb2);
		pan2.add(pan5, "3");
		JLabel lb3=new JLabel("Panel   3");
		pan5.add(lb3);
		button[0].addActionListener(new ActionListener() {
			
			@Override
			public void actionPerformed(ActionEvent e) {
				card.show(pan2, "1");
				
			}
		});
		button[1].addActionListener(new ActionListener() {
			
			@Override
			public void actionPerformed(ActionEvent e) {
				card.show(pan2, "2");
				
			}
		});
		button[2].addActionListener(new ActionListener() {
	
			@Override
			public void actionPerformed(ActionEvent e) {
				card.show(pan2, "3");
		
			}
		});
	}
	/**
	 * 网格包布局
	 */
	public void testGridBagLayOut(JFrame frame){
		    frame.setLayout(new GridBagLayout());
		    GridBagConstraints c = new GridBagConstraints();
		    for(int i=0;i<5;i++){
				button[i]=new JButton("按钮"+i);
				frame.add(button[i]);
			}
		 
		    c.fill = GridBagConstraints.HORIZONTAL;
		    c.gridx = 0;
		    c.gridy = 0;
		   // c.weightx = 0.2;//水平布局占的权重
		    frame.add(button[0], c);
		 
		    
		    c.fill = GridBagConstraints.HORIZONTAL;
		    c.weightx = 0.8;
		    c.gridx = 1;
		    c.gridy = 0;
		    frame.add(button[1], c);
		 
		   
		    c.fill = GridBagConstraints.HORIZONTAL;
		    c.weightx = 0.2;
		    c.gridx = 2;
		    c.gridy = 0;
		    frame.add(button[2], c);
		 
		  
		    c.fill = GridBagConstraints.HORIZONTAL;
		    c.ipady = 80; // make this component tall
		    c.weightx = 1;
		    c.gridwidth = 3;
		    c.gridx = 0;
		    c.gridy = 1;
		    frame.add(button[3], c);
		 
		  
		    c.fill = GridBagConstraints.HORIZONTAL;
		    c.weighty = 1.0;
		    c.weightx=1;
		    c.anchor = GridBagConstraints.PAGE_END; 
		    c.gridx = 1; 
		    c.gridwidth = 1; 
		    c.gridy = 2; 
		    frame.add(button[4], c);
	}
}