GUI编程学习代码

这是我的在B站上的听课时，码的老师讲课的代码，没有过多的解释，有什么可以不懂得可以去看课。 之后的贪吃蛇之后再发，以及一个简单的画图板。 B站链接

1、简介

2、AWT

2.1、AWT简介

2.2、组件和容器

·Frame

package lesson1; import java.awt.*; import java.awt.event.WindowAdapter; import java.awt.event.WindowEvent; public class TestFrame { public static void main(String args[]) { //Frame,JDK,看源码 Frame frame = new Frame("我的第一个Java窗口！"); //需要设置可见性 frame.setVisible(true); //设置窗口大小 frame.setSize(400, 400); //设置背景颜色 frame.setBackground(new Color(85,150,68)); //设置大小固定 frame.setResizable(false); frame.addWindowListener(new WindowAdapter() { //窗口关闭的时候需要做的事情 public void windowClosing(WindowEvent e) { //结束程序 System.exit(0); } }); } }

关闭事件，窗口关不了

package lesson1; import java.awt.*; import java.awt.event.WindowAdapter; import java.awt.event.WindowEvent; public class TestFrame2 { public static void main(String args[]) { MyFrame myframe1 = new MyFrame(100,100,200,200,Color.blue); MyFrame myframe2 = new MyFrame(300,100,200,200,Color.red); MyFrame myframe3 = new MyFrame(100,300,200,200,Color.yellow); MyFrame myframe4 = new MyFrame(300,300,200,200,Color.green); } } class MyFrame extends Frame{ static int id = 0; //可能存在多个窗口，我们需要一个计数器 public MyFrame(int x,int y,int w,int h,Color color) { super("MyFrame"+(++id)); setBackground(color); setBounds(x,y,w,h); setVisible(true); } }

·Panel

解决了关闭事件

package lesson1; import java.awt.*; import java.awt.event.WindowAdapter; import java.awt.event.WindowEvent; //panel可以看成是一个空间，但是不能单独存在 public class TestPanel { public static void main(String args[]) { Frame frame = new Frame(); Panel panel = new Panel(); //设置布局 frame.setLayout(null); //坐标 frame.setBounds(300,300,500,500); frame.setBackground(new Color(40,160,32)); //panel设置坐标，相对于frame panel.setBounds(50,50,400,400); panel.setBackground(new Color(193,15,60)); frame.add(panel); frame.setVisible(true); //监听事件，监听窗口关闭事件 //适配器模式 frame.addWindowListener(new WindowAdapter() { //窗口关闭的时候需要做的事情 public void windowClosing(WindowEvent e) { //结束程序 System.exit(0); } }); } }

2.3、布局管理器

·流式布局

package lesson1; import java.awt.*; public class TestFlowLayout { public static void main(String[] args) { Frame frame = new Frame(); //组件——按钮 Button button1 = new Button("button1"); Button button2 = new Button("button2"); Button button3 = new Button("button3"); //设置为流式布局 //frame.setLayout(new FlowLayout()); frame.setLayout(new FlowLayout(FlowLayout.LEFT)); frame.setSize(200, 200); //把按钮添加上去 frame.add(button1); frame.add(button2); frame.add(button3); frame.setVisible(true); } }

·东西南北中

package lesson1; import java.awt.*; public class TestBorderLayout { public static void main(String args[]) { Frame frame = new Frame("TestBorderLayout"); Button east = new Button("East"); Button west = new Button("West"); Button south = new Button("South"); Button north = new Button("North"); Button center = new Button("Center"); frame.add(east,BorderLayout.EAST); frame.add(west,BorderLayout.WEST); frame.add(south,BorderLayout.SOUTH); frame.add(north,BorderLayout.NORTH); frame.add(center,BorderLayout.CENTER); frame.setSize(200,200); frame.setVisible(true); } }

·表格布局

package lesson1; import java.awt.*; public class TestGridLayout { public static void main(String args[]) { Frame frame = new Frame("TestBorderLayout"); Button button1 = new Button("button1"); Button button2 = new Button("button2"); Button button3 = new Button("button3"); Button button4 = new Button("button4"); Button button5 = new Button("button5"); Button button6 = new Button("button6"); frame.setLayout(new GridLayout(3,2,1,1)); frame.add(button1); frame.add(button2); frame.add(button3); frame.add(button4); frame.add(button5); frame.add(button6); frame.pack(); frame.setVisible(true); } }

·练习

package lesson1; import java.awt.*; import java.awt.event.WindowAdapter; import java.awt.event.WindowEvent; public class ExerciseDemo { public static void main(String args[]) { Frame frame = new Frame(); frame.setSize(400,400); frame.setLocation(300, 300); frame.setBackground(Color.blue); frame.setVisible(true); frame.setLayout(new GridLayout(2,1)); Panel p1 = new Panel(new BorderLayout()); Panel p2 = new Panel(new GridLayout(2,1)); Panel p3 = new Panel(new BorderLayout()); Panel p4 = new Panel(new GridLayout(2,2)); //上面 p1.add(new Button("East-1"),BorderLayout.EAST); p1.add(new Button("West-1"),BorderLayout.WEST); p2.add(new Button("p2-button-1")); p2.add(new Button("p2-button-2")); p1.add(p2,BorderLayout.CENTER); //下面 p3.add(new Button("East-2"), BorderLayout.EAST); p3.add(new Button("West-2"), BorderLayout.WEST); for(int i= 1;i<=4;i++) { p4.add(new Button("for-"+i)); } p3.add(p4,BorderLayout.CENTER); frame.add(p1); frame.add(p3); frame.addWindowListener(new WindowAdapter() { public void windowClosing(WindowEvent e) { System.exit(0); } }); } }

2.4、事件监听

package lesson2; import java.awt.*; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import java.awt.event.WindowAdapter; import java.awt.event.WindowEvent; public class TestActionEvent { public static void main(String args[]) { //按下按钮，触发一些事件 Frame frame = new Frame(); Button button = new Button(); //因为，addActionListener()需要一个ActionListener，所以我们构造一个ActionListener MyActionListener myActionListener = new MyActionListener(); button.addActionListener(myActionListener); frame.add(button,BorderLayout.CENTER); frame.pack(); WindowClose(frame); frame.setVisible(true); } //关闭窗体事件 private static void WindowClose(Frame frame) { frame.addWindowListener(new WindowAdapter() { public void windowClosing(WindowEvent e) { System.exit(0); } }); } } class MyActionListener implements ActionListener{ public void actionPerformed(ActionEvent e) { System.out.println("aaa"); } } package lesson2; import java.awt.BorderLayout; import java.awt.Button; import java.awt.Frame; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; public class TestActionEvent2 { public static void main(String args[]) { //两个按钮，实现同一个监听 Frame frame = new Frame(); Button button1 = new Button("start"); Button button2 = new Button("stop"); button2.setActionCommand("button2_stop"); MyMonitor myMonitor = new MyMonitor(); button1.addActionListener(myMonitor); button2.addActionListener(myMonitor); frame.add(button1,BorderLayout.EAST); frame.add(button2,BorderLayout.WEST); frame.pack(); frame.setVisible(true); } } class MyMonitor implements ActionListener{ @Override public void actionPerformed(ActionEvent e) { // System.out.println("按钮被点击了"+e.getActionCommand()); } }

2.5、输入框TextField监听

package lesson2; import java.awt.Frame; import java.awt.TextField; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import javax.sound.midi.Soundbank; public class TestText01 { public static void main(String args[]) { //启动！ new MyFrame(); } } class MyFrame extends Frame{ public MyFrame() { TextField textField = new TextField();//写单行文本 add(textField); //监听这个文本框输入的文字 MyActionListen02 myActionListen02 = new MyActionListen02(); //监听这个文本框输入的文字 //按下enter就会触发这个输入框的时间 textField.addActionListener(myActionListen02); //设置替换编码 textField.setEchoChar('*'); setVisible(true); pack(); } } class MyActionListen02 implements ActionListener{ @Override public void actionPerformed(ActionEvent e) { TextField field = (TextField)e.getSource();//获得一些资源 System.out.println(field.getText());//获得输入框中的文本 field.setText("");//清空 } }

2.6、简易计算器，组合与内部类

package lesson2; import java.awt.*; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; public class TestCalc { public static void main(String args[]) { new Calculator().loadFrame(); } } //计算机类 class Calculator extends Frame{ //属性 TextField num1,num2,num3; //方法 public void loadFrame() { //三个文本框 num1 = new TextField(10); num2 = new TextField(10); num3 = new TextField(20); Button button = new Button("="); Label label = new Label("+"); button.addActionListener(new MyCalculatorListener(this)); //布局 setLayout(new FlowLayout()); add(num1); add(label); add(num2); add(button); add(num3); pack(); setVisible(true); } } class MyCalculatorListener implements ActionListener{ //获取计算机这个对象 Calculator calculator = null; public MyCalculatorListener(Calculator calculator) { this.calculator = calculator; } @Override public void actionPerformed(ActionEvent e) { //获得加数和被加数 //将这个值加法运算后，放到第三个框 //清除前两个框 int n1 = Integer.parseInt(calculator.num1.getText()); int n2 = Integer.parseInt(calculator.num2.getText()); calculator.num3.setText(""+(n1+n2)); calculator.num1.setText(""); calculator.num2.setText(""); } } //监听器类 /* * class MyCalculatorListener implements ActionListener{ //获取三个变量 private TextField num1,num2,num3; public MyCalculatorListener(TextField num1,TextField num2,TextField num3) { this.num1 = num1; this.num2 = num2; this.num3 = num3; } @Override public void actionPerformed(ActionEvent e) { //获得加数和被加数 int n1 = Integer.parseInt(num1.getText()); int n2 = Integer.parseInt(num2.getText()); //将这个值加法运算后，放到第三个框 num3.setText(""+(n1+n2)); //清除前两个框 num1.setText(""); num2.setText(""); } } */

2.7、画笔

package lesson3; import java.awt.*; import java.awt.Paint; import java.awt.PaintContext; public class TestPaint { public static void main(String args[]) { new MyPaint().loadFrame(); } } class MyPaint extends Frame{ public void loadFrame() { setBounds(200, 200, 600, 500); setVisible(true); } //画笔 public void paint(Graphics g) { //画笔，需要有颜色，画笔可以画画 g.setColor(Color.red); g.drawOval(100, 100, 100, 100); g.fillOval(300, 300, 100, 100); g.setColor(Color.GREEN); g.fillRect(150, 200, 200, 200); } }

2.8、鼠标监听

目的：想要实现鼠标画画！

import java.awt.*; import java.awt.event.MouseAdapter; import java.awt.event.MouseEvent; import java.awt.event.MouseListener; import java.util.ArrayList; import java.util.Iterator; public class TestMouseListen { public static void main(String args[]) { new MyFrame("画图"); } } class MyFrame extends Frame{ //画画需要画笔，需要监听鼠标当前的位置，需要集合存储这个点 ArrayList points; public MyFrame(String title) { super(title); setBounds(200, 200, 400, 300); //存储鼠标的点 points = new ArrayList<>(); setVisible(true); //鼠标监听器，正对这个窗口 this.addMouseListener(new MyMouseListener()); } public void paint( g) { //画画，监听鼠标的事件 Iterator iterator = points.iterator(); while (iterator.hasNext()) { Point point = (Point) iterator.next(); g.setColor(Color.CYAN); g.fillOval(point.x, point.y, 10, 10); } } //添加点到界面上 public void addPoint(Point point) { points.add(point); } //适配器模式 private class MyMouseListener extends MouseAdapter{ //按下，弹起，按住不放 public void mouseClicked(MouseEvent e) { MyFrame myFrame = (MyFrame) e.getSource(); //我们点击的时候，就会在界面上产生一个点 //这个点就是鼠标的点 myFrame.addPoint(new Point(e.getX(),e.getY())); //每次点击鼠标都需要重画一遍 myFrame.repaint();//每次刷新 } } }

2.9、窗口监听

import java.awt.Color; import java.awt.Frame; import java.awt.event.WindowAdapter; import java.awt.event.WindowEvent; public class TestWindow { public static void main(String aegs[]) { new WindowFrame(); } } class WindowFrame extends Frame{ public WindowFrame() { setBackground(Color.DARK_GRAY); setBounds(100, 100, 200, 200); setVisible(true); addWindowListener(new MyWindowListen()); } class MyWindowListen extends WindowAdapter{ @Override public void windowClosing(WindowEvent e) { setVisible(false);//隐藏窗口，通过按钮 System.exit(0);//正常退出 } } }

优化后：

package lesson3; import java.awt.Color; import java.awt.Frame; import java.awt.event.WindowAdapter; import java.awt.event.WindowEvent; public class TestWindow { public static void main(String aegs[]) { new WindowFrame(); } } class WindowFrame extends Frame{ public WindowFrame() { setBackground(Color.DARK_GRAY); setBounds(100, 100, 200, 200); setVisible(true); this.addWindowListener(new WindowAdapter() { @Override public void windowClosing(WindowEvent e) { System.out.println("windowClosing!"); setVisible(false);//隐藏窗口，通过按钮 System.exit(0);//正常退出 } @Override public void windowActivated(WindowEvent e) { WindowFrame source = (WindowFrame) e.getSource(); source.setTitle("你好棒!"); System.out.println("windowActivated!"); } }); } }

2.10、键盘监听

package lesson3; import java.awt.Frame; import java.awt.event.KeyAdapter; import java.awt.event.KeyEvent; public class TestKeyListener { public static void main(String args[]) { new KeyFrame(); } } class KeyFrame extends Frame{ public KeyFrame() { setBounds(1, 2, 300, 400); setVisible(true); this.addKeyListener(new KeyAdapter() { //键盘按下 @Override public void keyPressed(KeyEvent e) { //获取键盘下的键是什么 int keyCode = e.getKeyCode(); if(keyCode == KeyEvent.VK_UP) { System.out.println("你按下了上键！"); } //根据按下不同的操作，产生不同的结果 } }); } }

3、Swing

3.1、窗口，面板

package lesson4; import javax.swing.*; import java.awt.*; public class JFrameDemo { //init();初始化 public void init() { //顶级窗口 JFrame jFrame = new JFrame("这是一个JFrame窗口"); jFrame.setVisible(true); jFrame.setBounds(100,100,200,200); jFrame.setBackground(Color.darkGray); //设置文字Jlabel JLabel label = new JLabel("不欢迎请滚!"); jFrame.add(label); //让我们的文本标签居中 label.setHorizontalAlignment(SwingConstants.CENTER); //实例化对象 Container container = jFrame.getContentPane(); container.setBackground(Color.YELLOW); //关闭事件 jFrame.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE); } public static void main(String args[]) { //建立一个窗口 new JFrameDemo().init(); } }

3.2、弹窗

package lesson4; import javax.swing.*; import java.awt.*; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; //主窗口 public class DialogDemo extends JFrame { public DialogDemo() { this.setVisible(true); this.setSize(700, 500); this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE); //JFrame 放东西，容器 Container container = this.getContentPane(); //绝对布局 container.setLayout(null); //按钮 JButton button = new JButton("点击弹出一个弹窗"); button.setBounds(30,30,200,200); //点击这个按钮的时候，弹出一个弹窗 button.addActionListener(new ActionListener() { @Override public void actionPerformed(ActionEvent e) { //弹窗 new MydialogDemo(); } }); container.add(button); } public static void main(String args[]) { new DialogDemo(); } } //弹窗的窗口 class MydialogDemo extends JDialog{ public MydialogDemo() { this.setVisible(true); this.setBounds(100,100,500,500); //this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE); Container container = this.getContentPane(); container.setLayout(null); container.setBounds(30, 30, 60, 60); container.add(new Label("真丑")); } }

3.3、标签

·label

new Jlable("XXX");

·图标ICON

package lesson4; import java.awt.*; import javax.swing.*; //图标，需要实现类，Frame继承 public class IconDemo extends JFrame implements Icon{ private int width; private int height; public IconDemo() {} //无参构造 public IconDemo(int width,int height) { this.width = width; this.height = height; } public void init() { IconDemo iconDemo = new IconDemo(15,15); //图标放在标签，也可以放在按钮上！ JLabel label = new JLabel("icontest",iconDemo,SwingConstants.CENTER); Container container = getContentPane(); container.add(label); this.setVisible(true); this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE); } @Override public void paintIcon(Component c, Graphics g, int x, int y) { g.fillOval(x, y, width,height); } @Override public int getIconWidth() { return this.width; } @Override public int getIconHeight() { return this.height; } public static void main(String[] args) { new IconDemo().init(); } }

·图片ICON

package lesson4; import java.net.URL; import java.awt.*; import javax.swing.*; public class ImageIconDemo extends JFrame { public ImageIconDemo() { //获取图片地址 JLabel lable = new JLabel("ImageIcon"); URL url = ImageIconDemo.class.getResource("tp.jpg"); ImageIcon imageIcon = new ImageIcon(url); lable.setIcon(imageIcon); lable.setHorizontalAlignment(SwingConstants.CENTER); Container container = getContentPane(); container.add(lable); setVisible(true); setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE); setBounds(500, 500, 800, 800); } public static void main(String args[]) { new ImageIconDemo(); } }

3.4、面板

package lesson5; import java.awt.Container; import java.awt.GridBagLayout; import java.awt.GridLayout; import javax.swing.*;; public class JPanelDemo extends JFrame{ public JPanelDemo() { Container container = this.getContentPane(); //设置行数，列数，行、列之间的距离 container.setLayout(new GridLayout(2,1,10,10)); JPanel panel1 = new JPanel(new GridLayout(1,3)); JPanel panel2 = new JPanel(new GridLayout(2,3)); JPanel panel3 = new JPanel(new GridLayout(1,2)); JPanel panel4 = new JPanel(new GridLayout(2,2)); panel1.add(new JButton("1")); panel1.add(new JButton("1")); panel1.add(new JButton("1")); panel2.add(new JButton("2")); panel2.add(new JButton("2")); panel2.add(new JButton("2")); panel2.add(new JButton("2")); panel2.add(new JButton("2")); panel2.add(new JButton("2")); panel3.add(new JButton("3")); panel3.add(new JButton("3")); panel4.add(new JButton("4")); panel4.add(new JButton("4")); panel4.add(new JButton("4")); panel4.add(new JButton("4")); container.add(panel1); container.add(panel2); container.add(panel3); container.add(panel4); this.setVisible(true); this.setSize(500, 500); this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE); } public static void main(String aegs[]) { new JPanelDemo(); } }

·Jscroll

package lesson5; import javax.swing.*; import java.awt.*; public class JscrollDemo extends JFrame{ public JscrollDemo() { Container container = this.getContentPane(); //文本域 JTextArea textArea = new JTextArea(20,50); textArea.setText("欢迎来到王者荣耀"); //Scroll面板 JScrollPane scrollPane = new JScrollPane(textArea); container.add(scrollPane); this.setVisible(true); this.setBounds(100,100,300,500); this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE); } public static void main(String args[]) { new JscrollDemo(); } }

3.5、按钮

·图片 -> 图标

package lesson5; import javax.swing.*; import java.awt.*; import java.net.URL; public class JButtonDemo1 extends JFrame{ public JButtonDemo1() { Container container = this.getContentPane(); //将一个图片变为图标 URL resource = JButtonDemo1.class.getResource("tp.jpg"); Icon icon = new ImageIcon(resource); //将图标放在按钮上 JButton button = new JButton(); button.setIcon(icon); button.setToolTipText("图片按钮"); button.setSize(30,80); container.add(button); this.setVisible(true); this.setSize(500, 300); this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE); } public static void main(String args[]) { new JButtonDemo1(); } }

·单选按钮

package lesson5; import javax.swing.*; import java.awt.*; import java.net.URL; public class JButtonDemo2 extends JFrame{ public JButtonDemo2() { Container container = this.getContentPane(); //将一个图片变为图标 URL resource = JButtonDemo1.class.getResource("tp.jpg"); Icon icon = new ImageIcon(resource); //单选框 JRadioButton radioButton1 = new JRadioButton("RadioButton1"); JRadioButton radioButton2 = new JRadioButton("RadioButton2"); JRadioButton radioButton3 = new JRadioButton("RadioButton3"); //由于单选框只能选择一个，分组,一个组中只能选一个 ButtonGroup group = new ButtonGroup(); group.add(radioButton1); group.add(radioButton2); group.add(radioButton3); container.add(radioButton1,BorderLayout.NORTH); container.add(radioButton2,BorderLayout.CENTER); container.add(radioButton3,BorderLayout.SOUTH); this.setVisible(true); this.setSize(500, 300); this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE); } public static void main(String args[]) { new JButtonDemo2(); } }

·复选按钮

package lesson5; import javax.swing.*; import java.awt.*; import java.net.URL; public class JButtonDemo3 extends JFrame{ public JButtonDemo3() { Container container = this.getContentPane(); //将一个图片变为图标 URL resource = JButtonDemo1.class.getResource("tp.jpg"); Icon icon = new ImageIcon(resource); //多选框 JCheckBox checkBox1 = new JCheckBox("checkBox1"); JCheckBox checkBox2 = new JCheckBox("checkBox2"); container.add(checkBox1,BorderLayout.NORTH); container.add(checkBox2,BorderLayout.SOUTH); this.setVisible(true); this.setSize(500, 300); this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE); } public static void main(String args[]) { new JButtonDemo3(); } }

3.6、列表

·下拉框

package lesson6; import javax.swing.*; import java.awt.*; public class TestCoboboxDemo1 extends JFrame{ public TestCoboboxDemo1() { Container container = this.getContentPane(); JComboBox status = new JComboBox(); status.addItem(null); status.addItem("正在热映"); status.addItem("已下架"); status.addItem("即将上演"); container.add(status); this.setVisible(true); this.setSize(500, 350); this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE); } public static void main(String args[]) { new TestCoboboxDemo1(); } }

·列表框

package lesson6; import javax.swing.*; import java.awt.*; public class TestCoboboxDemo2 extends JFrame{ public TestCoboboxDemo2() { Container container = this.getContentPane(); //生成列表内容 String[] contents = {"1","2","3"}; //列表中需要放入内容 JList jList = new JList(contents); container.add(jList); this.setVisible(true); this.setSize(500, 350); this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE); } public static void main(String args[]) { new TestCoboboxDemo2(); } } package lesson6; import javax.swing.*; import java.awt.*; import java.util.Vector; public class TestCoboboxDemo2 extends JFrame{ public TestCoboboxDemo2() { Container container = this.getContentPane(); Vector contents = new Vector(); //列表中需要放入内容 JList jList = new JList(contents); contents.add("张三"); contents.add("李四"); contents.add("王二"); container.add(jList); this.setVisible(true); this.setSize(500, 350); this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE); } public static void main(String args[]) { new TestCoboboxDemo2(); } }

3.7、文本框

·文本框

package lesson6; import javax.swing.*; import java.awt.*; public class TestTextDemo1 extends JFrame{ public TestTextDemo1() { Container container = this.getContentPane(); JTextField textField1 = new JTextField("Hello"); JTextField textField2 = new JTextField("World"); container.add(textField1,BorderLayout.NORTH); container.add(textField2,BorderLayout.SOUTH); this.setVisible(true); this.setSize(500, 350); this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE); } public static void main(String args[]) { new TestTextDemo1(); } }

·密码框

package lesson6; import javax.swing.*; import java.awt.*; public class TestTextDemo2 extends JFrame{ public TestTextDemo2() { Container container = this.getContentPane(); JPasswordField passwordField = new JPasswordField(); passwordField.setEchoChar('*'); container.add(passwordField); this.setVisible(true); this.setSize(500, 350); this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE); } public static void main(String args[]) { new TestTextDemo2(); } }

·文本域

package lesson5; import javax.swing.*; import java.awt.*; public class JscrollDemo extends JFrame{ public JscrollDemo() { Container container = this.getContentPane(); //文本域 JTextArea textArea = new JTextArea(20,50); textArea.setText("欢迎来到王者荣耀"); //Scroll面板 JScrollPane scrollPane = new JScrollPane(textArea); container.add(scrollPane); this.setVisible(true); this.setBounds(100,100,300,350); this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE); } public static void main(String args[]) { new JscrollDemo(); } }