Question

JAVA 考试编程题如何编写一个矩形类

JAVA 考试编程题如何编写一个矩形类

Answer 1

用春敏信这个肯定可以
public class Rectangle {

private float width;//长
private float height;//宽

public Rectangle(float width, float height){
this.width = width;
this.height = height;
}

//计扒轮算周长= （长拿运+宽）＊2
public float calcCircle(){
return (width + height) * 2;
}

//计算面积 长＊宽
public float calcArea(){
return width * height;
}

public float getHeight() {
return height;
}

public void setHeight(float height) {
this.height = height;
}

public float getWidth() {
return width;
}

public void setWidth(float width) {
this.width = width;
}

}

Answer 2

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"清镇);

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);
}
}
已添加异租正桥常处理，测试成弊猛功