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太强了!所有GUI编程笔记里面我愿称你为最强,建议先收藏再看!

承蒙不弃 2021-09-30 阅读 39

简介

Gui的核心技术:Swing AWT

因为界面不美观。

需要jre环境!

为什么我们要学习?

   1. 可以写出自己心中想要的一些小工具
2. 工作时候,也可能需要维护到swing界面,概率极小!
3. 了解MVC架构,了解监听!

AWT

组件和容器

Frame

public class newawttest {
public static void main(String[] args) {
//创建一个Frame类
Frame frame = new Frame("这是个测试");

//设置窗口可见化
frame.setVisible(true);

//设置窗口尺寸
frame.setSize(400,300);

//设置背景颜色
frame.setBackground(new Color(203, 33, 33));

//设置初始位置
frame.setLocation(200,200);

//设置大小固定
frame.setResizable(false);

}


}

import java.awt.*;

public class MyawtText_2 {
public static void main(String[] args) {
Newawt newawt1 = new Newawt(100,100,200,200,Color.BLUE);
Newawt newawt2 = new Newawt(300,100,200,200,Color.YELLOW);
Newawt newawt3 = new Newawt(100,300,200,200,Color.RED);
Newawt newawt4 = new Newawt(300,300,200,200,Color.PINK);
}
}

class Newawt extends Frame {
static int id = 0;
public Newawt(int x,int y,int w,int h,Color color) {
super("窗口"+(++id));
setVisible(true);
setBounds(x,y,w,h);
setBackground(color);

}
}


面板Panel

import java.awt.*;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;

public class newawttest {
public static void main(String[] args){
Frame frame=new Frame();
Panel panel=new Panel();
Panel panel2 = new Panel();
//设置布局
frame.setLayout(null);
//坐标
frame.setBounds(300,300,500,500);
// frame.setBounds(0,0,0,0);
frame.setBackground(new Color(40,161,35));

panel2.setBounds(0,0,200,200);
panel2.setBackground(new Color(255, 241, 190));
frame.add(panel2);
//paneL 设置坐标,相对于frame
panel.setBounds(0,0,300,300);
panel.setBackground(new Color(193,15,60));
//frame.add(panel) ;
frame.add(panel);


//窗口可视化
frame.setVisible(true);

//适配器模式,把原有的接口换成继承类
frame.addWindowListener(new WindowAdapter() {
@Override
public void windowClosing(WindowEvent e) {
System.exit(0);
}
});

}

}

布局管理器

流式布局

import java.awt.*;


public class newawttest {
public static void main(String[] args) {
Frame frame = new Frame();
//按钮
Button button1 = new Button("button1");
Button button2 = new Button("button2");
Button button3 = new Button("button3");
//设置流式布局
frame.setLayout(new FlowLayout()); //默认居中
// frame.setLayout(new FlowLayout(FlowLayout.LEFT));
// frame.setLayout(new FlowLayout(FlowLayout.RIGHT));
// frame.setLayout(new FlowLayout(FlowLayout.LEADING));
// frame.setLayout(new FlowLayout(FlowLayout.TRAILING));


frame.add(button1);
frame.add(button2);
frame.add(button3);
frame.setSize(400,400);
frame.setVisible(true);


}
}

东西南北中

import java.awt.*;


public class newawttest {
public static void main(String[] args) {
Frame frame = new Frame();
//按钮
Button west = new Button("West");
Button East = new Button("East");
Button North = new Button("North");
Button South = new Button("South");
Button Center = new Button("Center");

frame.add(west,BorderLayout.WEST);
frame.add(East,BorderLayout.EAST);
frame.add(North,BorderLayout.NORTH);
frame.add(South,BorderLayout.SOUTH);
frame.add(Center,BorderLayout.CENTER);

frame.setVisible(true);
frame.setSize(400,400);

}
}


表格布局

import java.awt.*;


public class newawttest {
public static void main(String[] args) {
Frame frame = new Frame();
//按钮
Button but1 = new Button("but1");
Button but2 = new Button("but2");
Button but3 = new Button("but3");
Button but4 = new Button("but4");
Button but5 = new Button("but5");
Button but6 = new Button("but6");


frame.setLayout(new GridLayout(2,3));

frame.add(but1);
frame.add(but2);
frame.add(but3);
frame.add(but4);
frame.add(but5);
frame.add(but6);

frame.pack(); //Java语法,自动分布大小
frame.setVisible(true);


}
}


练习题

import java.awt.*;


public class newawttest {
public static void main(String[] args) {
Frame frame = new Frame();

frame.setVisible(true);
frame.setBounds(400,300,300,300);
// frame.pack();
frame.setBackground(Color.BLUE);
frame.setLayout(new GridLayout(2, 1));

//面板
Panel panel1 = new Panel(new GridLayout(2,1));
Panel panel2 = new Panel(new GridLayout(2,2));
Panel panel3 = new Panel(new BorderLayout());
Panel panel4 = new Panel(new BorderLayout());

//上
panel3.add(new Button("East-1"),BorderLayout.EAST);
panel3.add(new Button("West-1"),BorderLayout.WEST);
panel1.add(new Button("top"));
panel1.add(new Button("down"));
panel3.add(panel1,BorderLayout.CENTER);

//下
panel4.add(new Button("East-2"),BorderLayout.EAST);
panel4.add(new Button("West-2"),BorderLayout.WEST);
panel2.add(new Button("top-1"));
panel2.add(new Button("top-1"));
panel2.add(new Button("down-1"));
panel2.add(new Button("down-2"));
panel4.add(panel2,BorderLayout.CENTER);

frame.add(panel3);
frame.add(panel4);


}
}

事件监听

import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import java.util.EventListener;


public class newawttest {
public static void main(String[] args) {
//按下按钮,触发一些事件
Frame frame = new Frame();
Button button = new Button("button");

//因为addActionListener()需要一个ActionListener,所以需要构造一个ActionListener。
MyActionListener myActionListener = new MyActionListener();
button.addActionListener(myActionListener);

frame.add(button,BorderLayout.CENTER);
frame.pack();

frame.setVisible(true);

ExitWindows(frame);



}



private static void ExitWindows(Frame frame){
frame.addWindowListener(new WindowAdapter() {
@Override
public void windowClosing(WindowEvent e) {
System.exit(0);
}
});
}
}

class MyActionListener implements ActionListener{

@Override
public void actionPerformed(ActionEvent e) {
System.out.println("Hello,World!");
}
}


多个按钮共享一个事件

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 newawttest {
public static void main(String[] args) {
//按下按钮,触发一些事件
Frame frame = new Frame("开始-停止");
Button button1 = new Button("start");
Button button2 = new Button("stop");
// 可以显示的定义触发会返回的命令,如果不显示定义,则会走默认的值!
// 可以多个按钮只写一个临听类
button1.addActionListener(new MyAction());
button2.addActionListener(new MyAction());

button2.setActionCommand("This is stop!");

frame.add(button1,BorderLayout.NORTH);
frame.add(button2,BorderLayout.SOUTH);

frame.setVisible(true);
frame.pack();

ExitWindows(frame);

}



private static void ExitWindows(Frame frame){
frame.addWindowListener(new WindowAdapter() {
@Override
public void windowClosing(WindowEvent e) {
System.exit(0);
}
});
}
}

//关闭窗体事件
class MyAction implements ActionListener{

@Override
public void actionPerformed(ActionEvent e) {
System.out.println("输出:msg=>"+e.getActionCommand());//获得按钮信息
}
}


输入框 TextField 监听

import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

public class TextFieldaaa {
public static void main(String[] args) {
//启动
new MyFrame();
new newawttest().ExitWindows(new MyFrame());

}
}

class MyFrame extends Frame{
public MyFrame(){
TextField textField = new TextField();
add(textField);

//监听这个文本框输入的文字
MyAction2 myAction2 = new MyAction2();
//按下Enter就会触发输入框的事件
textField.addActionListener(myAction2);

textField.setEchoChar('*'); //设置替换编码
pack();
setVisible(true);
}
}

class MyAction2 implements ActionListener{
@Override
public void actionPerformed(ActionEvent e) {
TextField field = (TextField) e.getSource(); //获得一些资源,返回一个对象
System.out.println(field.getText()); //得到输入框文本
field.setText(""); //每次输入完清空
}
}

简易计算器,组合和内部类

//初代码
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 TextCalc {
public static void main(String[] args) {
new CalcLater();
}
}
class CalcLater extends Frame {
public CalcLater(){
//三个文本框
TextField field1 = new TextField(10);
TextField field2 = new TextField(10);
TextField field3 = new TextField(20);
//一个按钮
Button button = new Button("=");
button.addActionListener(new MyCalcLaterListener(field1,field2,field3));
//一个标签
Label label = new Label("+");
//布局
setLayout(new FlowLayout());

add(field1);
add(label);
add(field2);
add(button);
add(field3);

setVisible(true);
pack();

// ExitWindows(new CalcLater());

}

public static void ExitWindows(Frame frame){
frame.addWindowListener(new WindowAdapter() {
@Override
public void windowClosing(WindowEvent e) {
System.exit(0);
}
});
}
}

class MyCalcLaterListener implements ActionListener {
private TextField num1,num2,num3;

public MyCalcLaterListener(TextField num1, TextField num2, TextField num3) {
this.num1 = num1;
this.num2 = num2;
this.num3 = num3;
}

@Override
public void actionPerformed(ActionEvent e) {
//传三个数进来
int n1 = Integer.parseInt(num1.getText());
int n2 = Integer.parseInt(num2.getText());
//将运算结果放到第三个框
num3.setText(""+(n1+n2));
//将前两个数清空
num1.setText("");
num2.setText("");
}
}


//改造完全面向对象
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 TextCalc {
public static void main(String[] args) {
new CalcLater().LoadFrame();
}
}
class CalcLater extends Frame {

TextField num1,num2,num3;
Button button;
Label label;

//加载计算器
public void LoadFrame(){
//三个文本框
num1 = new TextField(10);
num2 = new TextField(10);
num3 = new TextField(20);
//一个按钮
button = new Button("=");
button.addActionListener(new MyCalcLaterListener(this));
//一个标签
label = new Label("+");

//布局
setLayout(new FlowLayout());
add(num1);
add(label);
add(num2);
add(button);
add(num3);

setVisible(true);
pack();

this.ExitWindows(this);
}

public void ExitWindows(Frame frame){
frame.addWindowListener(new WindowAdapter() {
@Override
public void windowClosing(WindowEvent e) {
System.exit(0);
}
});
}
}

//监听类
class MyCalcLaterListener implements ActionListener {
CalcLater calcLater = null;
public MyCalcLaterListener(CalcLater calcLater) {
this.calcLater = calcLater;
}

@Override
public void actionPerformed(ActionEvent e) {
//传三个数进来
int n1 = Integer.parseInt(calcLater.num1.getText());
int n2 = Integer.parseInt(calcLater.num2.getText());
//将运算结果放到第三个框
calcLater.num3.setText(""+(n1+n2));
//将前两个数清空
calcLater.num1.setText("");
calcLater.num2.setText("");
}
}


内部类最大的好处,就是可以畅通无阻地访问外部类的属性和方法

内部类写法↓

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 CalcLater extends Frame {

public static void main(String[] args) {
new CalcLater().LoadFrame();
}

TextField num1,num2,num3;
Button button;
Label label;

//加载计算器
public void LoadFrame(){
//三个文本框
num1 = new TextField(10);
num2 = new TextField(10);
num3 = new TextField(20);
//一个按钮
button = new Button("=");
button.addActionListener(new MyCalcLaterListener());
//一个标签
label = new Label("+");

//布局
setLayout(new FlowLayout());
add(num1);
add(label);
add(num2);
add(button);
add(num3);

setVisible(true);
pack();

this.ExitWindows(this);

}

private class MyCalcLaterListener implements ActionListener {
@Override
public void actionPerformed(ActionEvent e) {
//传三个数进来
int n1 = Integer.parseInt(num1.getText());
int n2 = Integer.parseInt(num2.getText());
//将运算结果放到第三个框
num3.setText(""+(n1+n2));
//将前两个数清空
num1.setText("");
num2.setText("");
}
}
public void ExitWindows(Frame frame){
frame.addWindowListener(new WindowAdapter() {
@Override
public void windowClosing(WindowEvent e) {
System.exit(0);
}
});
}
}

画笔

import java.awt.*;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;

public class TestMyPrints {
public static void main(String[] args) {
new MyPrints().LoadFrame();
}
}

class MyPrints extends Frame{

public void LoadFrame(){
setVisible(true);
setBounds(200,200,600,500);

}

@Override
public void paint(Graphics g) {
//super.paint(g);

//设置画笔颜色
g.setColor(Color.CYAN);
//填充一个实心圆
g.fillOval(100,100,100,100);

//画笔用完还原为最初的颜色
g.setColor(Color.BLACK);

}

}

鼠标监听

//画板实例
import java.awt.*;
import java.awt.event.*;
import java.util.ArrayList;
import java.util.Iterator;

public class MorseListenerTest {


public static void main(String[] args) {
new MyFrame("画图");
}
}

class MyFrame extends Frame{
//需要画笔,需要监听鼠标,需要集合存点
ArrayList points ;

public MyFrame(String title){
super(title);
setBounds(200,200,600,400);
setVisible(true);

//存鼠标的点
points = new ArrayList();
//鼠标监听器
this.addMouseListener(new MyListener());
this.addWindowListener(new WindowAdapter() {
@Override
public void windowClosing(WindowEvent e) {
System.exit(0);
}
});
}

//把点添加进去
public void addPoint(Point point){
points.add(point);
}


@Override
public void paint(Graphics g) {
//需要监听鼠标事件
Iterator iterator = points.iterator();
while (iterator.hasNext()){
Point point = (Point) iterator.next();
g.setColor(Color.BLUE);
g.fillOval(point.x,point.y,10,10);
}
}

//鼠标监听
private class MyListener extends MouseAdapter{
//鼠标点击

@Override
public void mousePressed(MouseEvent e) {
MyFrame myFrame = (MyFrame)e.getSource();
//这里我们点击的时候就会产生一个点
myFrame.addPoint(new Point(e.getX(),e.getY()));

//每次点击鼠标需要重画一遍
myFrame.repaint();
}
}
}

窗口监听

import java.awt.*;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;

public class TestWindows {
public static void main(String[] args) {
new MyFrame();
}
}

class MyFrame extends Frame{
public MyFrame(){

setVisible(true);
setBackground(Color.CYAN);
setBounds(200,200,400,400);


}

private class MyWindowsListenter extends WindowAdapter{
//关闭窗口
@Override
public void windowClosing(WindowEvent e) {
super.windowClosing(e);
}
//窗口被激活
@Override
public void windowActivated(WindowEvent e) {
super.windowActivated(e);
}
}


}



键盘监听


import java.awt.*;
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(){
setBackground(Color.blue);
setBounds(100,100,200,400);
setVisible(true);

this.addKeyListener(new KeyAdapter() {
@Override
public void keyPressed(KeyEvent e) {
//获取输入键的编码
System.out.println(e.getKeyCode());
}
});
}
}

Swing

窗口,面板

import javax.swing.*;
import java.awt.*;

public class JFrameDemo {

//init(); 初始化
public void init(){
JFrame jFrame = new JFrame("这是一个JFrame窗口");
jFrame.setVisible(true);
jFrame.setBounds(100,100,200,200);

//获得一个容器
Container contentPane = jFrame.getContentPane();
contentPane.setBackground(Color.YELLOW);

JLabel jLabel = new JLabel("欢迎来到笨蛋的窗口界面");
//设置文本居中
jLabel.setHorizontalAlignment(SwingConstants.CENTER);
jFrame.add(jLabel);
//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();
}
}


弹窗

import javax.swing.*;
import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

public class DialogDemo extends JFrame {
public DialogDemo(){
this.setVisible(true);
this.setBounds(100,100,700,500);
this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);

//Jframe 放东西,容器
Container contentPane = this.getContentPane();
//绝对布局
contentPane.setLayout(null);

contentPane.setBackground(Color.lightGray);

//按钮
JButton button = new JButton("这是个按钮");
button.setBounds(30,30,100,100);
button.setBackground(Color.BLUE);
//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 MyDiolog();
}
});
contentPane.add(button);
}

public static void main(String[] args) {
new DialogDemo();
}

}


class MyDiolog extends JDialog{
public MyDiolog() {
this.setVisible(true);
this.setBounds(100,100,300,300);
// this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
// 默认有关闭事件

Container container = this.getContentPane();
container.setLayout(null);

JLabel label = new JLabel("这是个弹窗");
label.setBounds(10,10,400,400);
container.add(label);
}

}

标签

package com.Miotsuki.SwingTest;

import javax.swing.*;
import java.awt.*;
import java.net.URL;

public class ImageIconDemo extends JFrame{
public ImageIconDemo(){


//获取图片地址
JLabel label = new JLabel("");
URL url = ImageIconDemo.class.getResource("蛋糕.PNG");
ImageIcon imageIcon = new ImageIcon(url);

label.setIcon(imageIcon);
label.setHorizontalAlignment(SwingConstants.CENTER);

Container container = this.getContentPane();
container.setBackground(new Color(196, 183, 255));
container.add(label);

this.setVisible(true);
this.setBounds(100,100,500,500);
this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);

}

public static void main(String[] args) {
new ImageIconDemo();
}
}


面板

import javax.swing.*;
import java.awt.*;


public class JPanelDemo2 extends JFrame {
public JPanelDemo2() {
Container container = this.getContentPane();
container.setLayout(new GridLayout(2, 1, 10, 10));
//后面的参数的意想,间原
JPanel panel1 = new JPanel(new GridLayout(1, 3));
JPanel panel2 = new JPanel(new GridLayout(1, 2));
JPanel panel3 = new JPanel(new GridLayout(2, 1));
JPanel panel4 = new JPanel(new GridLayout(3, 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"));
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"));
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[] args) {
new JPanelDemo2();
}
}

JScrollPanel

import javax.swing.*;
import java.awt.*;

public class JScrollDemo extends JFrame {
public JScrollDemo(){
Container contentPane = this.getContentPane();

//文本域
JTextArea textArea = new JTextArea(20, 20);
textArea.setText("欢迎使用:");

//Scroll面板
JScrollPane scrollPane = new JScrollPane(textArea);
contentPane.add(scrollPane);

this.setVisible(true);
this.setBounds(100,100,300,400);
this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
}

public static void main(String[] args) {
new JScrollDemo();
}

}

按钮

普通按钮

import javax.swing.*;
import java.awt.*;
import java.net.URL;

public class JButtonDemo1 extends JFrame {
public JButtonDemo1(){
//容器
Container container = this.getContentPane();

//获取图片位置
URL resource = JButtonDemo1.class.getResource("蛋糕.png");
Icon icon = new ImageIcon(resource);

//设置一个按钮
JButton button = new JButton();
button.setIcon(icon);
button.setToolTipText("这是个按钮,快按吧");

container.add(button);
setBounds(100,100,500,500);
setVisible(true);
setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
}

public static void main(String[] args) {
new JButtonDemo1();
}
}

单选按钮

import javax.swing.*;
import java.awt.*;
import java.net.URL;

public class JButtonDemo2 extends JFrame {
public JButtonDemo2(){
//容器
Container container = this.getContentPane();
//获取图片位置
URL resource = JButtonDemo1.class.getResource("蛋糕.png");
Icon icon = new ImageIcon(resource);

JRadioButton button1 = new JRadioButton("JRadioButton1");
JRadioButton button2 = new JRadioButton("JRadioButton2");
JRadioButton button3 = new JRadioButton("JRadioButton3");

ButtonGroup group = new ButtonGroup();
group.add(button1);
group.add(button2);
group.add(button3);

container.add(button1,BorderLayout.NORTH);
container.add(button2,BorderLayout.CENTER);
container.add(button3,BorderLayout.SOUTH);


setBounds(100,100,500,500);
setVisible(true);
setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
}

public static void main(String[] args) {
new JButtonDemo2();
}
}


复选按钮

import javax.swing.*;
import java.awt.*;
import java.net.URL;

public class JButtonDemo3 extends JFrame {
public JButtonDemo3(){
//容器
Container container = this.getContentPane();
//获取图片位置
URL resource = JButtonDemo1.class.getResource("蛋糕.png");
Icon icon = new ImageIcon(resource);

//多选按钮
JCheckBox checkBox1 = new JCheckBox("JCheckBox1");
JCheckBox checkBox2 = new JCheckBox("JCheckBox2");

container.add(checkBox1,BorderLayout.NORTH);
container.add(checkBox2,BorderLayout.SOUTH);


setBounds(100,100,500,500);
setVisible(true);
setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
}

public static void main(String[] args) {
new JButtonDemo3();
}
}


列表

下拉菜单

import javax.swing.*;
import java.awt.*;

public class ComboBosDemo01 extends JFrame{
public ComboBosDemo01(){
//容器
Container container = this.getContentPane();

JComboBox comboBox = new JComboBox();
comboBox.addItem(null);
comboBox.addItem("联系人");
comboBox.addItem("好友");
comboBox.addItem("黑名单");

container.add(comboBox);

//可视化,窗口大小,关闭事件
setVisible(true);
setBounds(100,100,500,500);
setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
}

public static void main(String[] args) {
new ComboBosDemo01();
}
}




列表框

import javax.swing.*;
import java.awt.*;
import java.util.Vector;

public class ComboBosDemo02 extends JFrame {
public ComboBosDemo02(){
//容器
Container container = this.getContentPane();

// String[] contents = {"1","2","3"};

Vector contents = new Vector();
JList jlist = new JList(contents);

contents.add("zhangsan");
contents.add("lisi");
contents.add("wangwu");


container.add(jlist);
//可视化,窗口大小,关闭事件
setVisible(true);
setBounds(100,100,500,500);
setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
}

public static void main(String[] args) {
new ComboBosDemo02();
}
}


文本框

import javax.swing.*;
import java.awt.*;

public class TextTestDemo01 extends JFrame {
public TextTestDemo01(){
//容器
Container container = this.getContentPane();
//文本框
JTextField textField = new JTextField("Hello",20);
JTextField textField2 = new JTextField("World");
//密码框
JPasswordField passwordField = new JPasswordField();

container.add(textField,BorderLayout.NORTH);
container.add(textField2,BorderLayout.SOUTH);
container.add(passwordField,BorderLayout.CENTER);

//可视化,窗口大小,关闭事件
setVisible(true);
setBounds(100,100,500,500);
setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
}

public static void main(String[] args) {
new TextTestDemo01();
}
}

文本域

import javax.swing.*;
import java.awt.*;

public class JScrollDemo extends JFrame {
public JScrollDemo(){
Container contentPane = this.getContentPane();

//文本域
JTextArea textArea = new JTextArea(20, 20);
textArea.setText("欢迎使用:");

//Scroll面板
JScrollPane scrollPane = new JScrollPane(textArea);
contentPane.add(scrollPane);

this.setVisible(true);
this.setBounds(100,100,300,400);
this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
}

public static void main(String[] args) {
new JScrollDemo();
}

}
1(){
//容器
Container container = this.getContentPane();
//文本框
JTextField textField = new JTextField(“Hello”,20);
JTextField textField2 = new JTextField(“World”);
//密码框
JPasswordField passwordField = new JPasswordField();

container.add(textField,BorderLayout.NORTH);
container.add(textField2,BorderLayout.SOUTH);
container.add(passwordField,BorderLayout.CENTER);

//可视化,窗口大小,关闭事件
setVisible(true);
setBounds(100,100,500,500);
setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
}

public static void main(String[] args) {
new TextTestDemo01();
}
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}


- 文本域

```java
import javax.swing.*;
import java.awt.*;

public class JScrollDemo extends JFrame {
public JScrollDemo(){
Container contentPane = this.getContentPane();

//文本域
JTextArea textArea = new JTextArea(20, 20);
textArea.setText("欢迎使用:");

//Scroll面板
JScrollPane scrollPane = new JScrollPane(textArea);
contentPane.add(scrollPane);

this.setVisible(true);
this.setBounds(100,100,300,400);
this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
}

public static void main(String[] args) {
new JScrollDemo();
}

}

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