Question

java编程题 ，求高手帮忙

1创建一个Rectangle类，添加2个属性width、height。
2在Rectangle中添加2个方法计算矩形的周长和面积。
3编程利用Rectangle类的对象输出一个矩形的周长和面积。

Answer 1

public class Rectangle {

private double width;
private double height;

public Rectangle(){

}

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

public static void main(String[] args) {
Rectangle r = new Rectangle(3, 4);
System.out.println( "长为3，宽为4得长方形面积为:"+ r.area());
System.out.println( "长为3，宽为4得长方形周长为:"+ r.perimeter());

}

public double area(){
return width * height;
}

public double perimeter(){
return 2 * (width + height);
}

}

Answer 2

public class Rectangle {

private double width;
private double height;
publice double getWidth(){
return this.width;
}
publice voidsetWidth(double width){
return this.width=width;
}
publice double getHeight(){
return this.width;
}
publice void getHeight(double height){
this.width=height
}

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

public double area(){
return width * height;
}

public double perimeter(){
return 2 * (width + height);
}
}

请养成良好的编程习惯