java第十二周作业

package week12;

public class Point {
    int x;
    int y;
    
     public Point(int x0,int y0) {
        super();
        this.x=x0;
        this.y=y0;
        
    }
     
     public Point() {
    super();
    
}
     public String movePoint(int dx,int dy) {
    x=x+dx;
    y=y+dy;
    return("x为"+x+"y为"+y);
    
}
     
    public static void main(String[] args) {
    Point p1=new Point(1,4);
    System.out.println(p1.movePoint(3,4));
    Point p2=new Point(2,3);
    System.out.println(p2.movePoint(3,4));
    }

}

 

 2.定义一个矩形类Rectangle: (知识点: 对象的创建和使用)[必做题]
2.1 定义三个方法: getArea(求面积、getPer0求周长，showAll0分 别在控制台输出长、宽、面积周长。
2.2 有2个属性:长length、 宽width
2.3 通过构造方法Rectangle(int width, int length),分别给两个属性赋值
2.4 创建-个Rectangle对象， 并输出相关信息

package week12;

public class Tu {
    int length;
    int width;
    public int getArea(int length,int width){
        return length*width;
    }
    public int getPer(int length,int width){
        return (length+width)*2;
    }
    public void showAll(){
        System.out.println("长是"+length+",宽是"+width+",周长是"+(length+width)*2+",面积是"+length*width);;
    }
     public Tu(int length,int width){
         super();
         this.length=length;
         this.width=width;
  }

    public static void main(String[] args) {
        // TODO Auto-generated method stub
        Tu r=new Tu(5,7);
        r.showAll();

    }

}

 

3.定义一-个笔记本类，该类有颜色(char) 和cpu型号(int) 两个属性。[必做题]
3.1无参和有参的两个构造方法;有参构造方法可以在创建对象的同时为每个属性赋值;
3.2 输出笔记本信息的方法
3.3 然后编写一-个测试类，测试笔记本类的各个方法。

package week12;

public class Com {
    char colour;
    int cpu;
    public void show(){
        System.out.println("笔记本的颜色是"+colour+",笔记本的型号是"+cpu);
    }
    
    public Com(char colour,int cpu){
        super();
        this.colour=colour;                                                                                                    
        this.cpu=cpu;
    }
    
    public Com(){
        super();
        
    }

    public static void main(String[] args) {
        
        
    }

}