JAVA第八次作业

1.

package xhy;

public class Point {
    public static 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=dx+x;
            y=dy+y;
            return("x为"+x+"y为"+y);
        }
        public static void main(String[] args) {
            Point p1=new Point(1,2);
            System.out.println(p1.movePoint(4, 3));
            Point p2=new Point(3,4);
            System.out.println(p2.movePoint(4, 5));
        }
    }

}

 

 

package xhy;

public class Rectangle {
    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("长方形的长为"+length+"宽为"+width+"周长为"+(length+width)*2+"面积为"+length*width);
    }
    public Rectangle(int length,int width) {
        super();
        this.length=length;
        this.width=width;
    }
    public static void main(String[]args) {
        Rectangle r=new Rectangle(1,2);
        r.showAll();
    }
}

 

 

package xhy;

public class Computer {
    char coulour;
    int cpu;
    public void show() {
        System.out.println("笔记本颜色是"+coulour+"色"+"型号是"+cpu);
    }
    public Computer(char coulour,int cpu) {
        super();
        this.coulour=coulour;
        this.cpu=cpu;
    }
    public Computer() {
        super();
    }

}

package xhy;

public class com {

    public static void main(String[] args) {
        // TODO Auto-generated method stub
        Computer c=new Computer();
        c.coulour='黑';
        c.cpu=123;
        c.show();
        Computer c1=new  Computer('白',456);
        c1.show();
    }

}

 

 

package xhy;

public class person {
    private String names;
    private int age;
    private double height;

    public String getNames() {
        return names;
    }

    public void setNames(String names) {
        this.names = names;
    }

    public int getAge() {
        return age;
    }

    public void setAge(int age) {
        this.age = age;
    }

    public double getHeight() {
        return height;
    }

    public void setHeight(double height) {
        this.height = height;
    }

    public person(String names, int age, double height) {
        super();
        this.names = names;
        this.age = age;
        this.height = height;
        }
    
    public void sayHello() {
        System.out.println("hello,my name is"+" "+names);
        System.out.println("年龄为"+age+"身高为"+height);
        }
        
    }
package xhy;

public class Test {

    public static void main(String[] args) {
        // TODO Auto-generated method stub
        person a1=new person("www",18,1.68);
        a1.sayHello();
        person a2=new person("yyy",18,1.78);
        a2.sayHello();
        
    }
}

 6.

定义一个汽车类Vehicle，要求如下：[选做题]
1.属性包括：汽车品牌brand（String类型）、颜色color（String类型）和速度speed（double类型），并且所有属性为私有。
2.至少提供一个有参的构造方法（要求品牌和颜色可以初始化为任意值，但速度的初始值必须为0）。
3.为私有属性提供访问器方法。注意：汽车品牌一旦初始化之后不能修改。
4.定义一个一般方法run()，用打印语句描述汽车奔跑
的功能
5.定义测试类VehicleTest，在其main方法中创建一个品牌为“benz”、颜色为“black”的汽车。

 

package why;

 

public class Vehicle {

 

    private String brand;

 

    private String color;

 

    private double speed;

 

    public Vehicle(String brand,String color){

 

       this.brand=brand;

 

       this.color=color;

 

      

 

    }

 

    Vehicle(String brand, String color, double speed) {

 

       super();

 

       this.brand = brand;

 

       this.color = color;

 

       this.speed = speed;

 

    }

 

    public void run(){

 

       System.out.println("这个汽车的品牌为"+this.brand+"这个汽车的颜色为"+this.color+"这个汽车的速度为"+this.speed);

 

}

 

}

 

package wen;

 

public class VehicleTest {

 

public static void main(String[] args) {

 

       Vehicle v=new Vehicle("benz","black");

 

       v.run();

 

       Vehicle v1=new Vehicle("benz","black",13);

 

       v1.run();

}

 

}