Java从入门到精通阅读笔记（第4版）11

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JPanel面板

package com.lzw;import java.awt.*;import javax.swing.*;public class JPanelTest extends JFrame {/** *  */private static final long serialVersionUID = 1L;public JPanelTest() {Container c = getContentPane();// 将整个容器设置为2行1列的网格布局c.setLayout(new GridLayout(2, 1, 10, 10));// 初始化一个面板，设置1行3列的网格布局JPanel p1 = new JPanel(new GridLayout(1, 3, 10, 10));JPanel p2 = new JPanel(new GridLayout(1, 2, 10, 10));JPanel p3 = new JPanel(new GridLayout(1, 2, 10, 10));JPanel p4 = new JPanel(new GridLayout(2, 1, 10, 10));p1.add(new JButton("1")); // 在面板中添加按钮p1.add(new JButton("1"));p1.add(new JButton("2"));p1.add(new JButton("3"));p2.add(new JButton("4"));p2.add(new JButton("5"));p3.add(new JButton("6"));p3.add(new JButton("7"));p4.add(new JButton("8"));p4.add(new JButton("9"));c.add(p1); // 在容器中添加面板c.add(p2);c.add(p3);c.add(p4);setTitle("在这个窗体中使用了面板");setSize(420, 200);setVisible(true);setDefaultCloseOperation(WindowConstants.DISPOSE_ON_CLOSE);}public static void main(String[] args) {new JPanelTest();}}

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