求一个java代码

来源：百度知道 编辑：UC知道 时间：2024/05/15 00:20:25
/*定义一个矩形类Rectangle,具有长和宽属性，具有两个方法分别计算周长和面积。
在另一个类的main函数中创建矩形对象，设置所需的属性值，打印其周长和面积。*/

class Rectangle{ private double chang, kuan;public void setChang(double chang){this.chang=chang;}public void setKuan(double kuan){this.kuan=kuan;} public double zhouchang() { return (chang kuan) * 2; } public double mianji() { return chang * kuan; }}public class Wb4{ public static void main(String[] jdsfkghekjrg) { System.out.println("输入长度"); double chang=Integer.parseInt(JOptionPane.showInputDialog(null, "Enter Number")); System.out.println("输入宽度"); double kuan=Integer.parseInt(JOptionPane.showInputDialog(null, "Enter Number")); Rectangle suanfa1 = new Rectangle();suanfa1 .setChang(chang);suanfa1 .setKuan(kuan); double a = suanfa1.zhouchang(); System.out.println("周长:" a); double a1 = suanfa2.mianji(); System.out.println("面积:" a1); }}

// Rectangle.java
public class Rectangle
{
public Rectangle(double x, double y)
{
长 = x;
宽 = y;
}
public double 周长() { re