街機空戰遊戲《飛天無限》7月29日推出登陸各大平臺

阿新 • • 發佈：2021-07-07

GUI程式設計

元件

視窗
彈窗
面板
文字框
列表框
按鈕
圖片
監聽事件
滑鼠事件
鍵盤事件

1.簡介

GUI的核心技術：Swing AWT

GUI不流行的原因

因為介面不美觀
需要jre環境

為什麼要學GUI？

可以寫出自己心中想要的一些小工具
工作時候，也可能需要維護到swing介面，概率極小
瞭解MVC架構，瞭解監聽

2.AWT

2.1AWT介紹

包含了很多的類和介面
有許多元素：視窗、按鈕、文字框
java.awt包

元件：Component

button
TextArea
Label
容器Container
- 視窗 Window
  - Frame
  - Dialog
- 面板 Panel
  - Applet

2.2元件和容器

Frame

package com.lvcong.lesson01;

import java.awt.*;

//GUI的第一個介面
public class TestFrame {
    public static void main(String[] args) {
        //Frame 看原始碼
        Frame frame = new Frame("我的第一個Java影象介面視窗");
        //要想視窗顯示出來，需要設定可見性w,h
        frame.setVisible(true);
        //設定視窗大小
        frame.setSize(400, 400);
        //設定背景顏色color
        frame.setBackground(new Color(1, 150, 255));
        //設定視窗彈出的初始位置
        frame.setLocation(822, 157);
        //設定視窗大小固定
        frame.setResizable(false);
    }

}

問題：發現視窗關閉不掉，停止Java程式！

嘗試回顧封裝：

package com.lvcong.lesson01;

import java.awt.*;

public class TestFrame2 {
    public static void main(String[] args) {
        //展示多個視窗
        MyFrame myFrame1 = new MyFrame(100, 100, 200, 200, Color.red);
        MyFrame myFrame2 = new MyFrame(300, 100, 200, 200, Color.blue);
        MyFrame myFrame3 = new MyFrame(500, 100, 200, 200, Color.black);
    }
}

class MyFrame extends Frame {
    static int id = 0;//可能存在多個視窗，我們需要一個計數器

    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面板

解決了關閉事件

package com.lvcong.lesson01;

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

//panel可以看成是一個空間，但是不能單獨存在
public class TestPanel {
    public static void main(String[] args) {
        Frame frame = new Frame();
        Panel panel = new Panel();
        //設定佈局
        frame.setLayout(null);
        //座標
        frame.setBounds(300, 300, 500, 500);
        frame.setBackground(new Color(5, 7, 12));
        //panel設定座標，相對於frame
        panel.setBounds(51, 51, 157, 157);
        panel.setBackground(new Color(157, 199, 197));
        //將面板新增到視窗
        frame.add(panel);
        frame.setVisible(true);
        //監聽事件，監聽視窗關閉事件 system.exit(0)
        //介面卡模式：
        frame.addWindowListener(new WindowAdapter() {
            //視窗點選關閉的時候需要做的事情
            @Override
            public void windowClosing(WindowEvent e) {
                //結束程式
                System.exit(0);
            }
        });
    }
}

3.佈局管理器

流式佈局

package com.lvcong.lesson01;

import java.awt.*;

public class TestFlowLayout {
    public static void main(String[] args) {
        Frame frame = new Frame();
        //元件-按鈕
        Button button1 = new Button("button1");
        Button button2 = new Button("button2");
        Button button3 = new Button("button3");
        //設定為流式佈局
//        frame.setLayout(new FlowLayout());
        frame.setLayout(new FlowLayout(FlowLayout.LEFT));
        frame.setSize(200, 200);
        //把按鈕新增到視窗
        frame.add(button1);
        frame.add(button2);
        frame.add(button3);
        frame.setVisible(true);

    }
}

東南西北中

package com.lvcong.lesson01;

import java.awt.*;

public class TestBorderLayout {
    public static void main(String[] args) {
        Frame frame = new Frame("BorderLayout");
        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(520, 520);
        frame.setVisible(true);

    }
}

表格佈局

package com.lvcong.lesson01;

import java.awt.*;

public class TestGridLayout {
    public static void main(String[] args) {
        Frame frame = new Frame("TestGridLayout");
        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));
        frame.add(button1);
        frame.add(button2);
        frame.add(button3);
        frame.add(button4);
        frame.add(button5);
        frame.add(button6);
        frame.pack();
        frame.setVisible(true);


    }
}

練習

package com.lvcong.lesson01;

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

public class Demo {
    public static void main(String[] args) {
        Frame frame = new Frame();
        frame.setSize(520, 520);
        frame.setLocation(300, 300);
        frame.setBackground(Color.red);
        frame.setLayout(new GridLayout(2, 1));
        //4個面板
        Panel panel1 = new Panel(new BorderLayout());
        Panel panel2 = new Panel(new GridLayout(2, 1));
        Panel panel3 = new Panel(new BorderLayout());
        Panel panel4 = new Panel(new GridLayout(2, 2));

        panel1.add(new Button("East-1"), BorderLayout.EAST);
        panel1.add(new Button("West-1"), BorderLayout.WEST);
        panel2.add(new Button("panel2-btn-1"));
        panel2.add(new Button("panel2-btn-2"));
        panel1.add(panel2, BorderLayout.CENTER);

        panel3.add(new Button("East-2"), BorderLayout.EAST);
        panel3.add(new Button("West-2"), BorderLayout.WEST);
//        panel4.add(new Button("panel4-btn-1"));
//        panel4.add(new Button("panel4-btn-2"));
//        panel4.add(new Button("panel4-btn-3"));
//        panel4.add(new Button("panel4-btn-4"));
        for (int i = 0; i < 4; i++) {
            panel4.add(new Button("four" + i));
        }
        panel3.add(panel4, BorderLayout.CENTER);
        frame.add(panel1);
        frame.add(panel3);

        frame.setVisible(true);
    }
}

總結

Frame是一個頂級視窗
Panel無法單獨顯示，必須新增到某個容器中
佈局管理器
1. 流式
2. 東西南北中
3. 表格
大小、定位、背景顏色、可見性、監聽

4.事件監聽

package com.lvcong.lesson01;

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) {
        //按下按鈕，觸發一些事件
        Frame frame = new Frame();
        Button button = new Button();
        //因為addActionListener()需要一個ActionListener，所以我們需要構造一個ActionListener
        MyActionListener myActionListener = new MyActionListener();
        button.addActionListener(myActionListener);
        frame.add(button, BorderLayout.CENTER);
        frame.pack();
        windowClose(frame);//關閉視窗
        frame.setVisible(true);
    }

    //關閉視窗的事件
    private static void windowClose(Frame frame) {
        frame.addWindowListener(new WindowAdapter() {
            @Override
            public void windowClosing(WindowEvent e) {
                System.exit(0);
            }
        });
    }
}

//事件監聽
class MyActionListener implements ActionListener {
    @Override
    public void actionPerformed(ActionEvent e) {
        System.out.println("我愛鄭爽");
    }
}

多個按鈕共享一個事件

package com.lvcong.lesson01;

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

public class TestActionTwo {
    public static void main(String[] args) {
        //兩個按鈕，實現同一個監聽
        //開始 停止
        Frame frame = new Frame("開始-停止");
        Button button1 = new Button("start");
        Button button2 = new Button("stop");
        //可以顯示的定義觸發會返回的命令，如果不顯示定義，則會走預設的值！
        //可以多個按鈕只寫一個監聽類
        button2.setActionCommand("button2-stop");
        MyMonitor myMonitor = new MyMonitor();
        button1.addActionListener(myMonitor);
        button2.addActionListener(myMonitor);

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

    }
}

class MyMonitor implements ActionListener {

    @Override
    public void actionPerformed(ActionEvent e) {
        System.out.println("按鈕被點選了：msg-->" + e.getActionCommand());

    }
}

輸入框監聽事件

package com.lvcong.lesson01;

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

public class TestText01 {
    public static void main(String[] args) {
        //啟動！
        new MyFrame02();
    }
}

class MyFrame02 extends Frame {
    public MyFrame02() {
        TextField textField = new TextField();
        //因為是繼承了Frame
        add(textField);
        //監聽這個文字框輸入的文字
        MyActionListener02 myActionListener02 = new MyActionListener02();
        //按下enter，觸發事件
        textField.addActionListener(myActionListener02);
        //設定替換編碼
        textField.setEchoChar('*');
        setVisible(true);
        pack();

    }
}

class MyActionListener02 implements ActionListener {

    @Override
    public void actionPerformed(ActionEvent e) {
        TextField textField = (TextField) e.getSource();//獲得一些資源,返回一個Object
        System.out.println(textField.getText());//獲得輸入框的文字
        textField.setText("");//null
    }
}

簡易計算器，組合+內部類回顧複習

oop原則：組合大於繼承

class A extends B{
    
}
class A{
    public B b;
}

普通寫法-面向過程

package com.lvcong.lesson01;

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

//簡易計算器
public class TestCalc {
    public static void main(String[] args) {
        new Calculator();
    }
}

//計算器類
class Calculator extends Frame {
    public Calculator() {
        //3個文字框
        TextField num1 = new TextField(10);//字元數
        TextField num2 = new TextField(10);
        TextField num3 = new TextField(20);
        //1個按鈕
        Button button = new Button("=");
        //button新增監聽事件
        button.addActionListener(new MyCalculatorListener(num1, num2, num3));
        //1個標籤
        Label label = new Label("+");
        //佈局
        setLayout(new FlowLayout());
        add(num1);
        add(label);
        add(num2);
        add(button);
        add(num3);
        pack();
        setVisible(true);

    }
}

//監聽器類
class MyCalculatorListener implements ActionListener {
    //獲取三個變數
    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) {
        //獲得加數和被加數
        int n1 = Integer.parseInt(num1.getText());
        int n2 = Integer.parseInt(num2.getText());
        //將這個值+法運算後，放到第三個框
        num3.setText("" + (n1 + n2));
        //清除前兩個框
        num1.setText("");
        num2.setText("");
    }
}

完全改造為面向物件寫法

package com.lvcong.lesson01;

import com.sun.prism.shader.FillCircle_RadialGradient_PAD_AlphaTest_Loader;

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

//簡易計算器
public class TestCalc1 {
    public static void main(String[] args) {
        new Calculator1().loadFrame();
    }
}

//計算器類
class Calculator1 extends Frame {
    //屬性
    TextField num1, num2, num3;

    //方法
    public void loadFrame() {
        num1 = new TextField(10);
        num2 = new TextField(10);
        num3 = new TextField(20);
        Button button = new Button("=");
        Label label = new Label("+");
        button.addActionListener(new MyCalculatorListener1(this));
        //佈局
        setLayout(new FlowLayout());
        add(num1);
        add(label);
        add(num2);
        add(button);
        add(num3);
        pack();
        setVisible(true);

    }
}

//監聽器類
class MyCalculatorListener1 implements ActionListener {
    //獲取計算器這個物件，在一個類中組合另外一個類
    Calculator1 calculator1 = null;

    public MyCalculatorListener1(Calculator1 calculator1) {
        this.calculator1 = calculator1;
    }

    @Override
    public void actionPerformed(ActionEvent e) {
//    1.獲得加數和被加數
//    2.將這個值加法運算後，放到第三個框
//    3.清除前兩個框
        int n1 = Integer.parseInt(calculator1.num1.getText());
        int n2 = Integer.parseInt(calculator1.num2.getText());
        calculator1.num3.setText("" + (n1 + n2));
        calculator1.num1.setText("");
        calculator1.num2.setText("");
    }
}

內部類

更好的包裝

package com.lvcong.lesson01;

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

public class TestCalc2 {
    public static void main(String[] args) {
        new Calculator2().loadFrame();
    }
}

//計算器類
class Calculator2 extends Frame {
    //屬性
    TextField num1, num2, num3;

    //方法
    public void loadFrame() {
        num1 = new TextField(10);
        num2 = new TextField(10);
        num3 = new TextField(20);
        Button button = new Button("=");
        Label label = new Label("+");
        button.addActionListener(new MyCalculatorListener2());
        //佈局
        setLayout(new FlowLayout());
        add(num1);
        add(label);
        add(num2);
        add(button);
        add(num3);
        pack();
        setVisible(true);

    }

    //監聽器類
    //內部類最大的好處，就是可以暢通無阻的訪問外部的屬性和方法
    private class MyCalculatorListener2 implements ActionListener {
        @Override
        public void actionPerformed(ActionEvent e) {
//    1.獲得加數和被加數
//    2.將這個值加法運算後，放到第三個框
//    3.清除前兩個框
            int n1 = Integer.parseInt(num1.getText());
            int n2 = Integer.parseInt(num2.getText());
            num3.setText("" + (n1 + n2));
            num1.setText("");
            num2.setText("");
        }
    }
}

畫筆paint

package com.lvcong.lesson02;

import java.awt.*;

public class TestPaint {
    public static void main(String[] args) {
        new MyPaint().loadFrame();
    }
}

class MyPaint extends Frame {
    public void loadFrame() {
        setBounds(200, 200, 800, 800);
        setVisible(true);
    }
    //畫筆

    @Override
    public void paint(Graphics g) {
        //畫筆需要顏色，可以用來畫畫
        g.setColor(Color.BLUE);
        g.drawOval(100,100,200,200);
        //養成習慣，畫筆用完，將它還原到最初的顏色
    }
}

滑鼠監聽

目的：想要實現滑鼠畫畫

package com.lvcong.lesson02;

import java.awt.*;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
import java.util.ArrayList;
import java.util.Iterator;

//滑鼠監聽事件
public class TestMouseListener {
    public static void main(String[] args) {
        new MyFrame("畫圖");
    }
}

//自己的類
class MyFrame extends Frame {
    //畫畫需要畫筆，需要監聽滑鼠當前的位置，需要集合來儲存這些點
    ArrayList points;

    public MyFrame(String title) {
        super(title);
        setBounds(200, 200, 500, 500);
        //存滑鼠點選的點
        points = new ArrayList<>();
        //滑鼠監聽器，針對這個視窗
        this.addMouseListener(new MyMouseListener());
        setVisible(true);
    }

    @Override
    public void paint(Graphics g) {
        //畫畫需要監聽滑鼠的事件
        Iterator iterator = points.iterator();
        while (iterator.hasNext()) {
            Point point = (Point) iterator.next();
            g.setColor(Color.BLUE);
            g.fillOval(point.x, point.y, 10, 10);
        }
    }

    //新增點到介面
    public void addPaint(Point point) {
        points.add(point);
    }

    //介面卡模式
    private class MyMouseListener extends MouseAdapter {
        //只需要滑鼠點選的事件
        @Override
        public void mousePressed(MouseEvent e) {
            MyFrame myFrame = (MyFrame) e.getSource();
            //這個我們點選的時候，就會在介面上產生一個點
            //這個點就是滑鼠的點
            myFrame.addPaint(new Point(e.getX(), e.getY()));
            //每次點選滑鼠都需要重新畫一遍
            myFrame.repaint();//重新整理

        }
    }
}

視窗監聽

package com.lvcong.lesson02;

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

public class TestWindow {
    public static void main(String[] args) {
        new WindowFrame();
    }
}

class WindowFrame extends Frame {
    public WindowFrame() {
        setBackground(Color.BLUE);
        setBounds(100,100,200,200);
        setVisible(true);
//        addWindowListener(new MyWindowListener());
        //匿名內部類
        this.addWindowListener(
                new WindowAdapter() {
                    @Override
                    public void windowClosing(WindowEvent e) {
                        System.exit(0);
                    }

                    @Override
                    public void windowActivated(WindowEvent e) {
                        WindowFrame source = (WindowFrame)e.getSource();
                        source.setTitle("被激活了");
                    }
                }
        );
    }

//    class MyWindowListener extends WindowAdapter {
//        @Override
//        public void windowClosing(WindowEvent e) {
////            setVisible(false);//隱藏視窗
//            System.exit(0);//正常退出
//        }
//    }
}

鍵盤監聽

package com.lvcong.lesson02;

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(300,300,500,500);
        setVisible(true);
        this.addKeyListener(
                new KeyAdapter() {
                    @Override
                    public void keyPressed(KeyEvent e) {
                        //獲得鍵盤下的鍵是哪一個
                        int keyCode = e.getKeyCode();//不需要去記錄這個數字，直接使用靜態屬性VK_XXX
                        if(keyCode == KeyEvent.VK_UP){
                            System.out.println("你按下了上鍵");

                        }
                    }
                }
        );
    }
}

Swing

package com.lvcong.lesson03;

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

public class JFrameDemo {
    //init();初始化
    public void init(){
        JFrame jFrame = new JFrame("這是一個JFrame視窗");
        jFrame.setVisible(true);
        jFrame.setBounds(300,300,500,500);
        jFrame.setBackground(Color.BLUE);
        //設定文字Jlabel
        JLabel jLabel = new JLabel("我愛鄭爽");
        jFrame.add(jLabel);
        //關閉事件
        jFrame.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
    }
    public static void main(String[] args) {
        //建立一個視窗
        new JFrameDemo().init();
    }
}

標籤居中

package com.lvcong.lesson03;

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

public class JFramDemo02 {
    public static void main(String[] args) {
        new MyJFrame2().init();
    }
}
class MyJFrame2 extends JFrame{
    public void init(){
        this.setBounds(100,100,500,500);
        this.setVisible(true);
        JLabel jLabel = new JLabel("645213");
        this.add(jLabel);
        jLabel.setHorizontalAlignment(SwingConstants.CENTER);
        //獲得一個容器
        Container container = this.getContentPane();
        container.setBackground(Color.BLUE);
        //關閉事件
        this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);


    }
}

彈窗

package com.lvcong.lesson03;

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

//主視窗
public class DialogDemo extends JFrame {
    public DialogDemo()  {
        this.setVisible(true);
        this.setSize(700,500);
        this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
        //JFrame放東西需要容器
        Container container = this.getContentPane();
        //絕對佈局
        container.setLayout(null);
        //按鈕
        JButton jButton = new JButton("點選彈出一個對話方塊");
        jButton.setBounds(30,30,200,50);
        container.add(jButton);
        //點選這個按鈕的時候，彈出一個彈窗
        jButton.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e) {//監聽器
                //彈窗
                new MyDialogDemo();
            }
        });
    }

    public static void main(String[] args) {
        new DialogDemo();
    }
}
//彈窗的視窗
class MyDialogDemo extends JDialog{
    public MyDialogDemo(){
        this.setVisible(true);
        this.setBounds(100,200,330,440);
        Container container = this.getContentPane();
        container.setLayout(null);
        container.add(new Label("4444444465464656646"));
    }
}

package com.lvcong.lesson03;

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

//圖示，需要實現類，Frame繼承
public class IconDemo extends JFrame implements Icon {
    public static void main(String[] args) {
        new IconDemo().init();
    }

    private int width;
    private int height;

    public IconDemo() {
    }//無參構造

    public IconDemo(int width, int height) {
        this.width = width;
        this.height = height;
    }

    public void init() {
        IconDemo iconDemo = new IconDemo(100, 100);
        //圖示放在標籤，也可以放在按鈕上
        JLabel jLabel = new JLabel("SHENYANG", iconDemo, SwingConstants.CENTER);
        Container container = getContentPane();
        container.add(jLabel);
        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;
    }
}

圖片

package com.lvcong.lesson03;

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

public class IconImageDemo extends JFrame {
    public IconImageDemo() {
        //獲取圖片的地址
        JLabel jLabel = new JLabel("zs");
        URL url = IconImageDemo.class.getResource("zs.jpeg");
        ImageIcon imageIcon = new ImageIcon(url);//建立一個圖示
        jLabel.setIcon(imageIcon);//將圖示加到標籤上
        jLabel.setHorizontalAlignment(SwingConstants.CENTER);
        Container container = getContentPane();
        container.add(jLabel);
        setVisible(true);
        setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
        setBounds(200, 200, 520, 520);

    }

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

面板

JPanel

package com.lvcong.lesson03;

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

public class JPanelDemo extends JFrame {
    public JPanelDemo() {
        Container container = this.getContentPane();
        container.setLayout(new GridLayout(2, 1, 10, 10));//後面引數的意思是間距
        JPanel jPanel1 = new JPanel(new GridLayout(1, 3));
        JPanel jPanel2 = new JPanel(new GridLayout(2, 2));
        jPanel1.add(new JButton("1"));
        jPanel1.add(new JButton("2"));
        jPanel1.add(new JButton("3"));
        jPanel2.add(new JButton("3"));
        jPanel2.add(new JButton("3"));
        jPanel2.add(new JButton("3"));
        jPanel2.add(new JButton("3"));
        container.add(jPanel1);
        container.add(jPanel2);
        this.setVisible(true);
        this.setBounds(200, 200, 500, 500);
        this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
    }

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

JScrollPanel

package com.lvcong.lesson03;

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

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

    public JScrollDemo() {
        Container container = this.getContentPane();
        //文字域
        JTextArea jTextArea = new JTextArea(20, 50);
        jTextArea.setText("鄭爽");
        //Scroll面板
        JScrollPane jScrollPane = new JScrollPane(jTextArea);
        container.add(jScrollPane);

        this.setVisible(true);
        this.setBounds(200, 200, 520, 520);
        this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);

    }
}

按鈕

圖片按鈕

package com.lvcong.Lesson04;

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

public class JButtonDemo extends JFrame {
    public static void main(String[] args) {
        new JButtonDemo();
    }

    public JButtonDemo() {
        Container container = this.getContentPane();
        //將一個圖片變為圖示
        URL url = JButtonDemo.class.getResource("zs.jpeg");
        Icon icon = new ImageIcon(url);
        //把這個圖示放到按鈕上
        JButton button = new JButton();
        button.setIcon(icon);
        button.setToolTipText("圖片按鈕");
        //add
        container.add(button);
        this.setVisible(true);
        this.setSize(500, 500);
        this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);


    }
}

單選按鈕

package com.lvcong.Lesson04;

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

public class JButtonDemo02 extends JFrame {
    public static void main(String[] args) {
        new JButtonDemo02();
    }

    public JButtonDemo02() {
        Container container = this.getContentPane();
        //將一個圖片變為圖示
        URL url = JButtonDemo.class.getResource("zs.jpeg");
        Icon icon = new ImageIcon(url);
        //單選框
        JRadioButton radioButton1 = new JRadioButton("radioButton1");
        JRadioButton radioButton2 = new JRadioButton("radioButton2");
        JRadioButton radioButton3 = new JRadioButton("radioButton3");

        //由於單選框只能選一個，所以需要分組,一個組裡只能選一個
        ButtonGroup group = new ButtonGroup();
        group.add(radioButton1);
        group.add(radioButton2);
        group.add(radioButton3);

        container.add(radioButton1, BorderLayout.CENTER);
        container.add(radioButton2, BorderLayout.NORTH);
        container.add(radioButton3, BorderLayout.SOUTH);


        this.setVisible(true);
        this.setSize(500, 500);
        this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
    }
}

多選按鈕

package com.lvcong.Lesson04;

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

public class JButtonDemo03 extends JFrame {
    public static void main(String[] args) {
        new JButtonDemo03();
    }

    public JButtonDemo03() {
        Container container = this.getContentPane();
        //多選框
        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, 500);
        this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
    }
}

列表

下拉框

package com.lvcong.Lesson04;

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

public class TestBoxDemo extends JFrame {


    public TestBoxDemo() {
        Container container = this.getContentPane();

        JComboBox status = new JComboBox();
        status.addItem(null);
        status.addItem("正版");
        status.addItem("微光");
        status.addItem("無所畏懼");
        container.add(status);
        this.setVisible(true);
        this.setSize(500, 500);
        this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
    }

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

    }
}

列表框

package com.lvcong.Lesson04;

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

public class TextBoxDemo02 extends JFrame {


    public TextBoxDemo02() {
        Container container = this.getContentPane();

        //生成列表的內容
//        String[] str = {"1", "2", "3"};
//        //列表中需要放入內容(靜態)
//        JList jList = new JList(str);
//        container.add(jList);

        //動態
        Vector vector = new Vector();
        JList jList1 = new JList(vector);
        vector.add("111");
        vector.add("222");
        vector.add("333");
        container.add(jList1);


        this.setVisible(true);
        this.setSize(500, 500);
        this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
    }

    public static void main(String[] args) {
        new TextBoxDemo02();

    }
}

應用場景

下拉框：選擇地區，或者一些單個選項
列表，展示資訊，一般是動態擴容！

文字框

文字框

package com.lvcong.Lesson04;

import sun.net.NetworkServer;

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

public class TestTextDemo extends JFrame {
    public static void main(String[] args) {
        new TestTextDemo();
    }

    public TestTextDemo() {
        Container container = this.getContentPane();
        //文字框
        JTextField textField1 = new JTextField("hello");
        JTextField textField2 = new JTextField("world", 20);
        container.add(textField1, BorderLayout.NORTH);
        container.add(textField2, BorderLayout.SOUTH);

        this.setVisible(true);
        this.setBounds(157, 197, 520, 520);
        this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
    }
}

密碼框

package com.lvcong.Lesson04;

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

public class TestTextDemo2 extends JFrame {
    public static void main(String[] args) {
        new TestTextDemo2();
    }

    public TestTextDemo2() {
        Container container = this.getContentPane();
        //密碼框
        JPasswordField passwordField = new JPasswordField();
        passwordField.setEchoChar('·');
        container.add(passwordField);

        this.setVisible(true);
        this.setBounds(157, 197, 520, 520);
        this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
    }
}

文字域

package com.lvcong.Lesson04;

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

public class TestTextDemo3 extends JFrame {
    public static void main(String[] args) {
        new TestTextDemo3();
    }

    public TestTextDemo3() {
        Container container = this.getContentPane();
        //文字域
        JTextArea jTextArea = new JTextArea(20, 50);
        jTextArea.setText("鄭爽");
        //Scroll面板
        JScrollPane jScrollPane = new JScrollPane(jTextArea);
        container.add(jScrollPane);
        this.setVisible(true);
        this.setBounds(157, 197, 520, 520);
        this.setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
    }
}