java awt设置button字体中文显示乱码 import java.awt.button

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卫斯理 2023-12-27 14:51:21

文章标签 java 开发语言后端 d3 ide 文章分类 Java 后端开发

GUI之AWT

AWT介绍

包含了很多个类和接口
元素：窗口，按钮，文本框
java.awt

组件和容器

弹窗 Frame

直接使用Frame

import java.awt.*;

public class TestFrame {
    public static void main(String[] args) {
        Frame frame = new Frame("我的第一个图形界面");
        //设置窗口可见性
        frame.setVisible(true);
        //设置窗口大小
        frame.setSize(500,500);
        //设置窗口位置
        frame.setLocation(300,300);
        //设置窗口颜色
        frame.setBackground(new Color(3, 206, 246));
        //设置窗口大小固定
        frame.setResizable(false);
    }
}

调用Frame的包，对其封装

import java.awt.*;

public class TestFrame2 {
    public static void main(String[] args) {
        MyFrame m1=new MyFrame(200,200,200,200,Color.red);
        MyFrame m2=new MyFrame(400,200,200,200,Color.black);
        MyFrame m3=new MyFrame(200,400,200,200,Color.cyan);
        MyFrame m4=new MyFrame(400,400,200,200,Color.green);
    }
}
class MyFrame extends Frame{
    static int id=0;
    public MyFrame(int x, int y, int w, int h, Color color){
        super(""+(++id));
        //设置窗口可见性
        setVisible(true);
        //设置窗口位置
        setLocation(x,y);
        //设置窗口大小
        setSize(w,h);
        //设置窗口颜色
        setBackground(color);
    }
}

面板 Panel

面板在窗口之中

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

public class TextPanel {
    public static void main(String[] args) {
        Frame frame = new Frame("大");
        Panel panel = new Panel();
        //设置窗口布局
        frame.setLayout(null);
        //设置窗口可见性
        frame.setVisible(true);
        //设置窗口位置
        frame.setLocation(500,50);
        //设置窗口大小
        frame.setSize(800,800);
        //设置窗口颜色
        frame.setBackground(new Color(116, 226, 50));
        //设置窗口大小固定
        frame.setResizable(false);
        //设置面板位置
        panel.setBounds(100,100,600,600);//相对于窗口的位置
        //设置面板颜色
        panel.setBackground(new Color(7, 234, 239));
        //窗口里面加入面板
        frame.add(panel);

        //监听事件，监听窗口关闭事件
        frame.addWindowListener(new WindowAdapter() {
            @Override
            public void windowClosing(WindowEvent e) {
                //结束程序
                System.exit(0);
            }
        });
    }
}

布局管理

流式布局 Flowlayout

import java.awt.*;
public class TestFlowlayout {
    public static void main(String[] args) {
        Frame frame = new Frame();
        frame.setSize(500,500);
        frame.setVisible(true);
        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");
        //设置流水式布局
        frame.setLayout(new FlowLayout());//默认在中上
        frame.setLayout(new FlowLayout(FlowLayout.LEFT));
        frame.setLayout(new FlowLayout(FlowLayout.RIGHT));
        //添加按钮
        frame.add(button1);
        frame.add(button2);
        frame.add(button3);
        frame.add(button4);
        frame.add(button5);
        frame.add(button6);
    }
}

东西南北中 BorderLayout

import java.awt.*;
public class TestBorderLayout {
    public static void main(String[] args) {
        Frame frame = new Frame();
        frame.setSize(500,500);
        frame.setVisible(true);
        Button east = new Button("east");
        Button west = new Button("west");
        Button south = new Button("south");
        Button north = new Button("north");
        Button canter = new Button("canter");
        //添加按钮
        frame.add(east,BorderLayout.EAST);
        frame.add(west,BorderLayout.WEST);
        frame.add(south,BorderLayout.SOUTH);
        frame.add(north,BorderLayout.NORTH);
        frame.add(canter,BorderLayout.CENTER);
    }
}

表格布局

import java.awt.*;
public class TestGridLayout {
    public static void main(String[] args) {
        Frame frame = new Frame();
        frame.setSize(500,500);
        frame.setVisible(true);
        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");
        //设置表格布局
        frame.setLayout(new GridLayout(3,2));
        //添加按钮
        frame.add(button1);
        frame.add(button2);
        frame.add(button3);
        frame.add(button4);
        frame.add(button5);
        frame.add(button6);
        //自动布局
        frame.pack();
    }
}

事件监听

事件监听：当某个事件发生的时候，要干什么

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) {
        //按下按钮发生一些事情
        Frame frame = new Frame();
        Button button = new Button("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);
        frame.pack();
        frame.setVisible(true);
        widowClose(frame);
    }
    //关闭窗口的方法
    private static void widowClose(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("你好！");
    }
}

多个按钮共享一个事件

import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
public class TestActionTwo {
    public static void main(String[] args) {
        //俩个按钮实现同一个监听
        Frame frame =new Frame("开始-结束");
        Button button1 = new Button("start");
        Button button2 = new Button("stop");
        MyMonitor myMonitor = new MyMonitor();
        button1.addActionListener(myMonitor);
        button2.addActionListener(myMonitor);
        frame.add(button1,BorderLayout.NORTH);
        frame.add(button2,BorderLayout.SOUTH);
        frame.setVisible(true);
        frame.setResizable(false);
        frame.pack();
    }
}
class MyMonitor implements ActionListener{
    @Override
    public void actionPerformed(ActionEvent e) {
        if(e.getActionCommand()=="start"){
            System.out.println("傻逼");
        }else{
            System.out.println("信球");
        }
    }
}

输入框TextFied

import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
public class Text {
    public static void main(String[] args) {
        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
        MyActionListener myActionListener = new MyActionListener();
        //按下enter就会触发这个输入的事件
        textField.addActionListener(myActionListener);
        //设置替换编码
        textField.setEchoChar('*');
        pack();
        setVisible(true);
    }
}
class MyActionListener implements ActionListener{
    @Override
    public void actionPerformed(ActionEvent e) {
        //获得一些资源，返回一个对象
        TextField field =(TextField) e.getSource();
        //获得输出文本框
        System.out.println(field.getText());
        field.setText("");
    }
}

加法器

基础加法器

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

public class TestCalc1 {
    public static void main(String[] args) {
        new Calculator();
    }
}
//计算器类
class Calculator extends Frame{
    public  Calculator(){
        //三个文本框
        TextField textField1 = new TextField(5);
        TextField textField2 = new TextField(5);
        TextField textField3 = new TextField(10);
        //一个按钮
        Button button = new Button("=");
        button.addActionListener(new MyCalculatorListener(textField1,textField2,textField3));
        //一个标签
        Label label = new Label("+");
        //布局
        setLayout(new FlowLayout());
        add(textField1);
        add(label);
        add(textField2);
        add(button);
        add(textField3);
        pack();
        setVisible(true);
    }
}
class MyCalculatorListener implements ActionListener{
    //获得三个变量
    private TextField textField1,textField2,textField3;
    public MyCalculatorListener(TextField textField1,TextField textField2,TextField textField3){
        this.textField1=textField1;
        this.textField2=textField2;
        this.textField3=textField3;
    }
    @Override
    public void actionPerformed(ActionEvent e) {
        //获得加数和被加数
        int num1=Integer.parseInt(textField1.getText());
        int num2=Integer.parseInt(textField2.getText());
        //将加法运算的结果放在第三个框
        textField3.setText(""+(num1+num2));
        //将前两个框清零
        textField1.setText("");
        textField2.setText("");
    }
}

面向对象优化

import java.awt.*;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
public class TestCalc2 {
    public static void main(String[] args) {
        new Calculator().loadFrame();
    }
}
//计算器类
class Calculator extends Frame{
    TextField textField1,textField2,textField3;
    public void loadFrame(){
        //三个文本框
        textField1 = new TextField(5);
        textField2 = new TextField(5);
        textField3 = new TextField(10);
        //一个按钮
        Button button = new Button("=");
        button.addActionListener(new MyCalculatorListener(this));
        //一个标签
        Label label = new Label("+");
        //布局
        setLayout(new FlowLayout());
        add(textField1);
        add(label);
        add(textField2);
        add(button);
        add(textField3);
        pack();
        setVisible(true);
    }
}
class MyCalculatorListener implements ActionListener {
    //获得加法器对象
    Calculator calculator = null;

    public MyCalculatorListener(Calculator calculator) {
        this.calculator = calculator;
        }
    @Override
    public void actionPerformed (ActionEvent e){
        //获得加数和被加数
        //将加法运算的结果放在第三个框
        //将前两个框清零
        int num1 = Integer.parseInt(calculator.textField1.getText());
        int num2 = Integer.parseInt(calculator.textField2.getText());
        calculator.textField3.setText("" + (num1 + num2));
        calculator.textField1.setText("");
        calculator.textField2.setText("");
    }
}

内部类优化

内部类的最大优势，可以畅通无阻的访问外部类

package top.dty.awt2;

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

public class TestCalc3 {
    public static void main(String[] args) {
        new Calculator().loadFrame();
    }
}
//计算器类
class Calculator extends Frame{
    TextField textField1,textField2,textField3;
    public void loadFrame(){
        //三个文本框
        textField1 = new TextField(5);
        textField2 = new TextField(5);
        textField3 = new TextField(10);
        //一个按钮
        Button button = new Button("=");
        button.addActionListener(new MyCalculatorListener());
        //一个标签
        Label label = new Label("+");
        //布局
        setLayout(new FlowLayout());
        add(textField1);
        add(label);
        add(textField2);
        add(button);
        add(textField3);
        pack();
        setVisible(true);
    }
    private class MyCalculatorListener implements ActionListener {
        @Override
        public void actionPerformed (ActionEvent e){
            //获得加数和被加数
            //将加法运算的结果放在第三个框
            //将前两个框清零
            int num1 = Integer.parseInt(textField1.getText());
            int num2 = Integer.parseInt(textField2.getText());
            textField3.setText("" + (num1 + num2));
            textField1.setText("");
            textField2.setText("");
        }
    }
}

画笔 paint

import java.awt.*;
public class TestPaint {
    public static void main(String[] args) {
        new MyPaint().loadFrame();
    }
}
class MyPaint extends Frame{
    public void loadFrame(){
        setBounds(200,100,800,600);
        setVisible(true);
    }
    //画笔
    @Override
    public void paint(Graphics g) {
        g.setColor(Color.red);
        g.drawOval(100,100,200,200);
        g.setColor(Color.cyan);
        g.fillOval(300,300,150,150);
        g.setColor(Color.blue);
        g.fillRect(500,100,150,150);
        //用完把画笔还原为原来的颜色
        g.setColor(Color.black);
    }
}

鼠标监听

import java.awt.*;
import java.awt.event.*;
import java.util.ArrayList;
import java.util.Iterator;
public class TestMouseLister {
    public static void main(String[] args) {
       IFrame iFrame = new IFrame("画板");
        iFrame.widowClose(iFrame);
    }
}
class IFrame extends Frame{
    //画画需要笔，需要监听鼠标当前位置，需要集合来存储这个点
    ArrayList points;
    public IFrame(String title){
        setBounds(200,200,800,600);
        //存鼠标点击的点
        points = new ArrayList<>();
        setVisible(true);
        //鼠标监听器，正对这个窗口
        this.addMouseListener(new MyMouseListener());
    }
    @Override
    public void paint(Graphics g) {
        //画面，监听鼠标的事件
        Iterator iterator = points.iterator();
        while(iterator.hasNext()){
            Point point = (Point)iterator.next();
            g.setColor(Color.blue);
            g.fillOval(point.x,point.y,10,10);
        }
    }
    public void addPaint(Point point){
        points.add(point);
    }
    private class MyMouseListener extends MouseAdapter{
        //鼠标 按下，弹起，按住不放

        @Override
        public void mousePressed(MouseEvent e) {
            IFrame frame = (IFrame) e.getSource();
            //这个我们点击的时候，就会产生一个点
            //这个点就是鼠标的点
            frame.addPaint(new Point(e.getX(),e.getY()));
            //每点击鼠标都啊哟重新画一遍
            frame.repaint();
        }
    }
    //关闭窗口的方法
    public static void widowClose(Frame frame){
        frame.addWindowListener(new WindowAdapter() {
            @Override
            public void windowClosing(WindowEvent e) {
                System.exit(0);
            }
        });
    }
}

窗口监听

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(){
        setBounds(200,200,800,600);
        setBackground(Color.cyan);
        setVisible(true);
        //匿名内部类
        this.addWindowListener(
                new WindowAdapter() {
                    //关闭窗口
                    @Override
                    public void windowClosing(WindowEvent e) {
                        System.out.println("windowClosing");
                        System.exit(0);
                    }
                    //激活窗口
                    @Override
                    public void windowActivated(WindowEvent e) {
                        WindowFrame source = (WindowFrame) e.getSource();
                        source.setTitle("被激活了");
                        System.out.println("windowActivated");
                    }
                }
        );
    }
}

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(){
        setBounds(1,1,100,100);
        setVisible(true);
        this.addKeyListener(new KeyAdapter() {
            //键盘按下
            @Override
            public void keyPressed(KeyEvent e) {
                //获得按下的是键盘的哪一个,获得键盘的码
                int keyCode=e.getKeyCode();
                System.out.println("这个键的keyCode值为"+keyCode);
                //不需要记keyCode，直接通过静态属性VK_...获取键位
                if(keyCode==KeyEvent.VK_UP){
                    System.out.println("你按了上键");
                }
            }
        });
    }
}

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