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();
	     
	}

}

  

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