Graphics的paint绘制矩形和椭圆

最新推荐文章于 2023-12-25 09:53:08 发布

繁星仙儿

最新推荐文章于 2023-12-25 09:53:08 发布

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文章标签： java 前端数据库

本文链接：https://blog.youkuaiyun.com/gang61/article/details/134127339

版权

package itheima006;

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

public class GraphicsDemo1_2 {
    public static void main(String[] args) {
        new GraphicsDemo1_2().init();
    }
    private String SHEPA_RECT="rect";
    private String SHEPA_OVAL="oval";
    private String shepa="";

    Frame frame = new Frame("Graphics画图");
    Button brect=new Button("绘制矩形");
    Button boval=new Button("绘制椭圆");



    private class Mydraw extends Canvas{
        @Override
        public void paint(Graphics g) {
            if(shepa.equals(SHEPA_RECT)){
                g.setColor(Color.BLACK);
                g.drawRect(100,100,150,150);
            }else if(shepa.equals(SHEPA_OVAL)){
                g.setColor(Color.red);
                g.drawOval(100,100,150,150);
            }

        }
    }
    Mydraw draw=new Mydraw();

    private void init() {


        brect.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e) {
                shepa=SHEPA_RECT;
                draw.repaint();
            }
        });
        boval.addActionListener(new ActionListener() {
            @Override
            public void actionPerformed(ActionEvent e) {
                shepa=SHEPA_OVAL;
                draw.repaint();
            }
        });
        //组件视图
        Panel p=new Panel();
        p.add(brect);
        p.add(boval);

        draw.setPreferredSize(new Dimension(300,500));

        frame.add(p,BorderLayout.SOUTH);
        frame.add(draw);

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



    }
}