11.5作业

 

 

package com.baidu;
public class TestSimpleCircle {
    public static void main(String[] args) {
        SimpleCircle circle1 = new SimpleCircle();
        System.out.println("The area of the cricle of radius " + circle1.radius + " is " + circle1.getArea());
        
        SimpleCircle circle2 = new SimpleCircle(25);
        System.out.println("The area of the circle of radius " + circle2.radius + " is " + circle2.getArea());
        
        SimpleCircle circle3 = new SimpleCircle(125);
        System.out.println("The area of the circle of radius " + circle3.radius + " is " + circle3.getArea());
        
        System.out.println("The area of the circle of radius " + circle3.radius + " is " + circle3.getArea());
        
        circle2.radius = 100;
        System.out.println("The area of the circle of radius " + circle2.radius + " is " + circle2.getArea());
        circle2.setRadius(10);
        System.out.println("The area of the circle of radius " + circle2.radius + " is " + circle2.getArea());
        
        SimpleCircle circle4 = new SimpleCircle(10);
        System.out.println("The area of the circle of radius " + circle4.radius + " is " + circle4.getPerimeter());
        
        circle2.radius = 10;
        System.out.println("The area of the circle of radius " + circle2.radius + " is " + circle2.getPerimeter());
        System.out.println(circle2.getPerimeter());
        
        double area=circle1.getArea();
        System.out.println(area);
        
        
        
    }
}
class SimpleCircle {
    double radius;
    SimpleCircle(){
        radius = 1;
    }
    SimpleCircle(double newRadius){
        radius = newRadius;
    }
    double getArea() {
        return radius*radius*Math.PI;
    }
    double getPerimeter() {
        return 2*radius*Math.PI;
    }
    void setRadius(double newRadius) {
        radius = newRadius;
    }
}

 

 

 

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package com.baidu;

public class Tv {
    public static void main(String[] args) {
    //  TV tv1=new TV();
    //  tv1.turnOff();
    //  tv1.setChannel(30);
    //  tv1.setVolumeLevel(3);
      
      Tv tv2=new Tv();
      tv2.turnOn();
      System.out.println("TV2's channel is "+tv2.channel+" and volume is "+tv2.volumeLevel);
      tv2.channelUp();
      System.out.println("TV2's channel is "+tv2.channel+" and volume is "+tv2.volumeLevel);
      tv2.channelUp();
      System.out.println("TV2's channel is "+tv2.channel

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+" and volume is "+tv2.volumeLevel);
      tv2.channelUp();
      System.out.println("TV2's channel is "+tv2.channel+" and volume is "+tv2.volumeLevel);
      tv2.volumeUp();
      System.out.println("TV2's channel is "+tv2.channel+" and volume is "+tv2.volumeLevel);
      tv2.volumeUp();
      System.out.println("TV2's channel is "+tv2.channel+" and volume is "+tv2.volumeLevel);
      tv2.volumeUp();
      System.out.println("TV2's channel is "+tv2.channel+" and volume is "+tv2.volumeLevel);
      
      
    }

    public int channel=1;
    public int volumeLevel=1;
    public boolean on=false;
    
    public Tv() {
        
    }
    public void turnOn() {
        on =true;
        System.out.println("电视机已经打开了。");
    }
    public void turnOff() {
        on=false;
        System.out.println("电视机已经关闭了。");
    }
    public int getChannel() {
        return channel;
    }
    public void setChannel(int channel) {
        if(on) {
            System.out.println("电视机已开，可以开始调台了。");
            if(channel>=1&&channel<=120) {
                this.channel = channel;
                System.out.println("频道已经调到 "+channel+" 台");
            }else {
                System.out.println("你要调的频道不存在。");
            }
        }else {
            System.out.println("电视机关着的时候是不能调台的");
        }
    }
    public int getVolumeLevel() {
        return volumeLevel;
    }
    public void setVolumeLevel(int volumeLevel) {
        if(on) {
            System.out.println("电视机已开，声音大小可调了");
            if(volumeLevel>=1&&volumeLevel<=7) {
                this.volumeLevel = volumeLevel;
                System.out.println("声音的大小设置成了 "+volumeLevel+" 大小");
            }
        }else {
            System.out.println("电视机关着的时候是不能调声音的");
        }
        
    }
    public void channelUp() {
        if(on&&channel<120) {
            channel++;
        }
    }
    public void channelDown() {
        if(on&&channel>1) {
            channel--;
        }
    }
    public void volumeUp() {
        if(on&&volumeLevel<7) {
            volumeLevel++;
        }
    }
    public void volumeDown() {
        if(on&&volumeLevel>1) {
            volumeLevel--;
        }
    }
 }
    

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package dengniu;
public class Dp {
    public static void main(String args[]) {
        Person per1 = new Person("张三",30);
        Person per2 = new Person("张三",30);    
        if(per1.getName().equals(per2.getName())&&per1.getAge()==per2.getAge()) {
            System.out.println("是同一个人！");
        }
    }
}

        class Person {
            private String name;
            private int age;
            public Person(String name,int age) {
                this.name = name;
                this.age = age;
            }
        
        
            
            public boolean compare(Person per) {
                if(this.name.equals(per.name)&&this.age==per.age) {
                    return true;
                }else {
                        return false;
                }
            }
            
//        public void fun(Person temp) {
//            temp.name="李武";
//            temp.age=45;
//        }
//    
        public String getName() {
            return this.name;
        }

        public int getAge() {
            return this.age;
        }
    }

        

        
    
    

    

 

 

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package dengniu;

public class DtaticDemo {

    public static void main(String[] args) {
        new DtaticDemo().fun();
    }
    public static void fun() {
        System.out.println("hellow every day!");

    }

}

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