实训作业4

public class Person {
    private String name;
    private int age;
// 无参构造方法
    public Person(){

    }
    //初始化姓名
    public Person(String name){
    this.name=name;
    }
    //初始化年龄
    public Person(int age){
    this.age=age;
    }
    //初始化姓名和年龄
    public Person(String name,int age){
    this.name=name;
    this.age=age;
    }
    //获取年龄
    public String getName(){
    return name;
    }
    //设置姓名
    public void setName(String name){
    this.name=name;
    }
    //获取年龄
    public int getAge(){
    return age;

    }
    //设置年龄
    public void setAge(int age){
    if(age<0){   //年龄不能为负
      this.age=0;
    }
    else{
      this.age=age;
    }
    }
    //打印信息
    public void printMessage(){
    System.out.println("name="+name+",age="+age);

    }
   //过了一年年龄加一
    public void addAge(){
    age++;
    }
    }

测试

public class TestPerson {

public static void main(String[] args) {

// TODO Auto-generated method stub

Person p1=new Person("小明",8);

p1.addAge();

p1.printMessage();

Person p2=new Person("小红");

p2.setAge(20);

p2.addAge();

p2.printMessage();

Person p3=new Person();

}

3.1 电费

private int count1;
private int count2;

public Cost1(){

}
public Cost1(int count1){
     this.count1=count1;
     }
public Cost1(int count2){
     this.count2=count2;

     }
   public Cost1(int count1,int count2){
     this.count1=count1;
     this.count2=count2;
     }
public int getCount1(){
     return count1;
     }
public void setCount1(int count1){
     this.count1=count1;
     }
public int getCount2(){
     return count2;
     }
public void setCount2(int count2){
     this.count2=count2;
     }
    public void printMessage(){
     System.out.println("count1="+count1+",count2="+count2);}
     double money(double money1,int count2){
     money1=money1*count2;
     System.out.println("电费为："+money1);

     }
}

测试类：

public static void main(String[] args) {

     Cost1 c1=new Cost1(1000,1200);
     c1.getCount1();
     c1.printMessage();
     double money1 = 1.2;

     Cost1 c2=new Cost1(1200,1500);
     c2.getCount2();
     c2.printMessage();


     Person p3=new Person();
    }

}

public class TestPerson {

public static void main(String[] args) {
  // TODO Auto-generated method stub
  Person p1=new Person("小明",8);
  p1.addAge();
  p1.printMessage();

  Person p2=new Person("小红");
  p2.setAge(20);
  p2.addAge();
  p2.printMessage();

  Person p3=new Person();

}

圆柱体：