• 第七次上机练习


    /*1、定义一个点类Point,包含2个成员变量x、y分别表示x和y坐标,2个构造器Point()和Point(int x0,y0),以及一个
    movePoint(int dx,int dy)方法实现点的位置移动,创建两个Point对象p1、p2,分别调用movePoint方法后,打印
    p1和p2的坐标。[必作题]*/
    package practice7.point;
    
    public class Point {
    
    	double x;
    	double y;
    	
    	public Point() {
    	}
    
    	public void Point(double x0,double y0) {
    		this.x = x0;
    		this.y = y0;
    		System.out.print("x的初始位置是" + this.x);
    		System.out.println("      " + "y的初始位置是" + this.y);
    	}
    	
    	public void movePoint(double dx,double dy){
    		this.x += dx;
    		this.y += dy;
    		System.out.print("x移动了" + dx + "个单位长度");
    		System.out.println("     " + "y移动了" + dy + "个单位长度");
    		System.out.print("x移动后的位置为:" + this.x);
    		System.out.println("   " + "y移动后的位置为:" + this.y);
    	}
    
    }
    

      

    package practice7.point;
    
    import java.util.Scanner;
    
    public class Test {
    
    	public static void main(String[] args) {
    		// TODO Auto-generated method stub
    
    		Point p1 = new Point();
            p1.Point(11.1, 22.2);
            p1.movePoint(33.3,44.4);
            
            Point p2 = new Point();
            p2.Point(55.5, 66.6);
            p2.movePoint(77.7,88.8);
    		
    	}
    
    }
    

      

    /*• 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、getPer()求周长,showAll()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 创建一个Rectangle对象,并输出相关信息*/
    package practice7.Rectangle;
    
    public class Rectangle {
    
    	int length;
        int width;
      
        public  Rectangle(int width,int length){
            this.length = length;
            this.width = width;
        }
        
        public int getArea(){
            int area = length * width;
            return area;
        }
            
        public int getPer(){
        	int per = (length + width)*2;
            return per;
        }
        
         void showAll(){
        	 System.out.println("length=" + length + " ");
             System.out.println("width=" + width + " ");
             System.out.println("area=" + getArea() + " ");
             System.out.println("per=" + getPer());
        }
        
    }
    

      

    package practice7.Rectangle;
    
    public class Test {
    
    	public static void main(String[] args) {
    		// TODO Auto-generated method stub
    
    		 Rectangle r = new Rectangle(12,55);
             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 practice7.Computer;
    
    public class Computer {
    
    	char color;
        int cpu;
    
        public void computer() {
    
        }
    
        public void information(char color, int cpu) {
            this.color = color;
            this.cpu = cpu;
    
        }
    
        void showAll() {
        	System.out.println("color:"+color);
        	System.out.println("cup:"+cpu);
        }
    }
    

      

    package practice7.Computer;
    
    public class Test {
    
    	public static void main(String[] args) {
    		// TODO Auto-generated method stub
    
    		Computer c=new Computer();
            c.information('粉',250);
            c.showAll();
    	}
    
    }
    

      

    /*• 6、定义两个类,描述如下: [必做题]
      • 6.1定义一个人类Person:
      • 6.1.1定义一个方法sayHello(),可以向对方发出问候语“hello,my name is XXX”
      • 6.1.2有三个属性:名字、身高、体重
      • 6.1.3通过构造方法,分别给三个属性赋值
      • 6.2定义一个Constructor类:
      • 6.2.1创建两个对象,分别是zhangsan,33岁,1.73;lishi,44,1.74
      • 6.2.2分别调用对象的sayHello()方法。*/
    package practice7.Person;
    
    public class Person {
    
    	String name;
        int age;
        double height;
        public void sayHello(){
        	System.out.println("hello,my name is " + name);
        }
        public void getValue(String name,int age,double height){
            this.name = name;
            this.age = age;
            this.height = height;
        }
    }
    

      

    package practice7.Person;
    
    public class Constructor {
    
    	public static void main(String[] args) {
    		// TODO Auto-generated method stub
    
    		 Person p1 = new Person();
    	     p1.getValue("zhangsan",33,1.73);
    	     p1.sayHello();
    	     
    	     Person p2 = new Person();
    	     p2.getValue("lishi",44,1.7);
    	     p2.sayHello();
    	     
    	}
    
    }
    

      

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  • 原文地址:https://www.cnblogs.com/wu-di-821-821/p/12808351.html
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