import javax.swing.JButton;
import javax.swing.JFrame;public class GUIDemo01 {public static void main(String[] args) {// 1.创建FrameJFrame frame = new JFrame();// 2.创建widgetJButton button = new JButton("有种就点击我！");// 3.把widget添加到frame上/*组件不会直接加到frame上，你可以把frame想象成window的框，* 组件是加到window的pane上面*/frame.getContentPane().add(button); // 4.显示出来frame.setSize(300, 300);frame.setVisible(true);}}

以上程序的效果：

frame.setDefaultCloseOperation(JFrame.DO_NOTHING_ON_CLOSE);

则无论用户怎么点击（除非用taskmgr强制关闭，否则怎么关闭都关不掉，我想有些流氓软件大致就是采用的这种思路吧）。

import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;import javax.swing.JButton;
import javax.swing.JFrame;public class GUIDemo implements ActionListener {  //实现ActionListener接口JButton button;public static void main(String[] args) {GUIDemo gui = new GUIDemo();gui.go();}public void go() {JFrame frame = new JFrame();button = new JButton("你有种你就点击我！");button.addActionListener(this); // 向按钮注册frame.getContentPane().add(button);frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);frame.setSize(640, 320);frame.setVisible(true);}@Overridepublic void actionPerformed(ActionEvent e) {button.setText("我被点击了！");}}

效果图：

import java.awt.BorderLayout;
import java.awt.Label;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;import javax.swing.JButton;
import javax.swing.JFrame;public class SimpleGUI implements ActionListener {JFrame frame;JButton button,button2; Label label;public static void main(String[] args) {SimpleGUI gui = new SimpleGUI();gui.go();}private void go() {frame = new JFrame();frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);button = new JButton("按钮一");button2 = new JButton("按钮二");label = new Label("显示相关信息");button.addActionListener(this);//给按钮添加监听器，该类要实现ActionListener接口button2.addActionListener(this);frame.getContentPane().add(BorderLayout.NORTH,button);frame.getContentPane().add(BorderLayout.SOUTH,button2);frame.getContentPane().add(BorderLayout.CENTER,label);frame.setSize(300, 300);frame.setVisible(true);}   Overridepublic void actionPerformed(ActionEvent arg0) {if (arg0.getSource()==button) {label.setText("按钮一被点击了！");else {label.setText("按钮二被点击了！");}}}

<span style="font-family: Arial, Helvetica, sans-serif; background-color: rgb(255, 255, 255);"> </span><span style="font-family: Arial, Helvetica, sans-serif; background-color: rgb(255, 255, 255);">用单一的事件处理程序来对付不同的东西就意味着要执行太多种不同工作的方法。如果想要改变某个工作，很可能会把全部工作都弄乱，这样的解决会对程序的可读性和维护性产生危害。有一点偏离了面向对象。</span>

方式二：使用匿名内部类：

import java.awt.BorderLayout;
import java.awt.Label;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;import javax.swing.JButton;
import javax.swing.JFrame;public class SimpleGUI {JFrame frame;Label label;public static void main(String[] args) {SimpleGUI gui = new SimpleGUI();gui.go();}private void go() {frame = new JFrame();frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);JButton button = new JButton("按钮一");JButton button2 = new JButton("按钮二");label = new Label("显示相关信息");button.addActionListener(new ActionListener() {@Overridepublic void actionPerformed(ActionEvent e) {label.setText("按钮一被点击了！");}});button2.addActionListener(new ActionListener() {@Overridepublic void actionPerformed(ActionEvent e) {label.setText("按钮二被点击了！");}});frame.getContentPane().add(BorderLayout.NORTH, button);frame.getContentPane().add(BorderLayout.SOUTH, button2);frame.getContentPane().add(BorderLayout.CENTER, label);frame.setSize(300, 300);frame.setVisible(true);}}

布局管理器（LayoutManager）

BorderLayout：

FlowLayout：

import java.awt.FlowLayout;import javax.swing.JButton;
import javax.swing.JFrame;public class SimpleGUI {JFrame frame;public static void main(String[] args) {SimpleGUI gui = new SimpleGUI();gui.go();}private void go() {frame = new JFrame("FlowLayout布局");frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);frame.setLayout(new FlowLayout(FlowLayout.LEFT));   //流式布局并左对齐JButton []b = new JButton[10];for (int i = 0; i < b.length; i++) {b[i] = new JButton(i+"");frame.getContentPane().add(b[i]);}frame.setVisible(true);}}

运行结果：

import java.awt.BorderLayout;
import java.awt.Color;import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;public class SimpleGUI {JFrame frame;public static void main(String[] args) {SimpleGUI gui = new SimpleGUI();gui.go();}private void go() {frame = new JFrame("BorderLayout布局");frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);JPanel panel = new JPanel();panel.setBackground(Color.BLUE);JButton button1 = new JButton("第一个按钮");JButton button2 = new JButton("第二个按钮");panel.add(button1);  //将按钮加入面板panel.add(button2);frame.getContentPane().add(BorderLayout.EAST, panel);   //将面板加入到窗体上frame.setSize(300, 300);frame.setVisible(true);}}

运行结果：

BoxLayout：

import javax.swing.Box;
import javax.swing.JButton;
import javax.swing.JFrame;public class SimpleGUI {JFrame frame;public static void main(String[] args) {SimpleGUI gui = new SimpleGUI();gui.go();}private void go() {frame = new JFrame("BoxLayout布局");frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);Box box = Box.createVerticalBox();JButton []b = new JButton[10];for (int i = 0; i < b.length; i++) {b[i] = new JButton(i+"");box.add(b[i]);}frame.getContentPane().add(box);frame.setVisible(true);}}

运行结果：

为按钮上的文字设置样式（字体、风格、大小）

import javax.swing.JButton;
import javax.swing.JFrame;public class SimpleGUI {JFrame frame;public static void main(String[] args) {SimpleGUI gui = new SimpleGUI();gui.go();}private void go() {frame = new JFrame("BorderLayout布局");frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);JButton button = new JButton("不悔梦归处，只恨太匆匆");button.setFont(new Font("楷体", Font.BOLD, 20));frame.getContentPane().add(BorderLayout.NORTH, button);frame.setSize(300, 300);frame.setVisible(true);}}

强制使面板使用BoxLayout（默认的面板使用FlowLayout）.

import java.awt.BorderLayout;
import java.awt.Color;import javax.swing.BoxLayout;
import javax.swing.JButton;
import javax.swing.JFrame;
import javax.swing.JPanel;public class SimpleGUI {JFrame frame;public static void main(String[] args) {SimpleGUI gui = new SimpleGUI();gui.go();}private void go() {frame = new JFrame("BorderLayout布局");frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);JPanel panel = new JPanel();panel.setBackground(Color.BLUE);panel.setLayout(new BoxLayout(panel, BoxLayout.Y_AXIS));//将Panel的布局改为垂直的 JButton button1 = new JButton("第一个按钮");JButton button2 = new JButton("第二个按钮");JButton button3 = new JButton("第三个按钮");JButton button4 = new JButton("第四个按钮");panel.add(button1); //将按钮加入面板panel.add(button2);panel.add(button3);panel.add(button4);frame.getContentPane().add(BorderLayout.EAST, panel); //将面板加入到窗体上frame.setSize(300, 300);frame.setVisible(true);}}