GUI布局
边界布局
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package guiTest;//JFrame默认的是边界布局BorderLayoutimport java.awt.BorderLayout;import javax.swing.JButton;import javax.swing.JFrame;public class BorderLayoutDemo { public static void main(String[] args) { JFrame f = new JFrame("边界布局BorderLayout"); //JFrame的默认LayoutManager为BorderLayout // f.setLayout(new BorderLayout());//可以不写，默认的就是流式布局 JButton btn = new JButton("北"); f.add(btn,BorderLayout.NORTH); btn=new JButton("南"); f.add(btn,BorderLayout.SOUTH); btn=new JButton("东"); f.add(btn,BorderLayout.EAST); btn=new JButton("西"); f.add(btn,BorderLayout.WEST); btn=new JButton("中"); f.add(btn,BorderLayout.CENTER); f.pack();//也可以用f.setSize(222,222);来进行设置 f.setVisible(true); f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); }} |
流式布局
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package guiTest;import java.awt.BorderLayout;import java.awt.CardLayout;import java.awt.event.ActionEvent;import java.awt.event.ActionListener;import javax.swing.JButton;import javax.swing.JFrame;import javax.swing.JLabel;import javax.swing.JPanel;public class CardLayoutDemo { private static JPanel p; public static void main(String[] args) { JFrame f = new JFrame("卡片布局CardLayout"); p=new JPanel(); //设置p的布局管理器为卡片布局CardLayout p.setLayout(new CardLayout()); //新建两个JPanel JPanel p1 = new JPanel(); JPanel p2 = new JPanel(); JLabel lb = new JLabel("第一个面板"); p1.add(lb);//面板里面加标签 lb=new JLabel("第二个面板"); p2.add(lb);//面板里面加标签 //将新建的两个JPanel面板添加到p中 p.add(p1,"first"); p.add(p2,"second"); //设置默认显示first所对应的JPanel p1 ((CardLayout)p.getLayout()).show(p,"first"); JButton btn = new JButton("改变面板"); btn.addActionListener(new ActionListener() { @Override public void actionPerformed(ActionEvent e) { // TODO Auto-generated method stub //当点击'改变面板'时，显示second对应的JPanel p2 ((CardLayout)p.getLayout()).show(p,"second"); } }); f.add(btn,BorderLayout.NORTH); f.add(p,BorderLayout.CENTER); f.setSize(400,150);//f.pack(); f.setVisible(true); f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); }} |
网格布局
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package guiTest;import java.awt.FlowLayout;import javax.swing.JButton;import javax.swing.JFrame;public class FlowLayoutDemo { public static void main(String[] args) { // TODO Auto-generated method stub JFrame f = new JFrame("流式布局FlowLayout"); f.setLayout(new FlowLayout()); for(int i=0;i<7;i++) { JButton btn=new JButton("Button"+i); f.add(btn); } f.setSize(300,250); //f.pack();默认边框设置宽度和长度刚刚好的样子 f.setVisible(true); f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); }} |
卡片布局
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package guiTest;import java.awt.GridLayout;import javax.swing.JButton;import javax.swing.JFrame;public class GirdLayoutDemo { public static void main(String[] args) { JFrame f = new JFrame("网格布局GirdLayout"); //设置f的布局管理器为3行3列的GirdLayout组件间水平与垂直间距为5 f.setLayout(new GridLayout(3,3,5,5)); for(int i=1;i<10;++i) { JButton btn = new JButton(String.valueOf(i)); f.add(btn); } f.pack(); f.setVisible(true); f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE); }} |
