JAVA编程：编写一个applet，读取一个矩形的边长，然后输入一个空心矩形

更新时间：2025-01-11 06:09:25

import java.awt.*;

import javax.swing.*;

public class drawRech extends JApplet {

public void paint(Graphics g){

super.paint(g);

this.setBackground(Color.WHITE);

String width = JOptionPane.showInputDialog("Enter the width");

String height = JOptionPane.showInputDialog("Enter the height");

int wid = 0;

int heig = 0;

try{

wid = Integer.parseInt(width);

heig = Integer.parseInt(height);

}

catch(NumberFormatException e){

JOptionPane.showMessageDialog(null, "Wrong input");

}

g.drawRect(100, 100, wid, heig);

}

已添加异常处理，测试成功