public class HomeWork3 {
    public static void main(String[] args) {
        Person p=new Person("qq",12);
        p.display();
        Person p1=new Person();
        p1.setAge(23);
        p1.setName("ww");
        p1.display();
    }
}
class Person{
    private String name;
    private int age;

    public Person() {
    }
    public Person(String name, int age) {
        this.name = name;
        this.age = age;
    }

    public String getName() {
        return name;
    }

    public void setName(String name) {
        this.name = name;
    }

    public int getAge() {
        return age;
    }

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

    public void display(){
//        System.out.println("name:"+this.getName()+"age"+this.getAge());
//        System.out.println("name:"+this.name+"age"+this.age);
        System.out.println("name:"+name+"age"+age);
    }
}

package csdn;

public class Test {

	public static void main(String[] args) {
		// TODO Auto-generated method stub

	}
	public class Student{
		private int age;
		private String name;
		public Student(int age,String name) {
			this.age=age;
			this.name=name;
		}
	}
}

		public void setAge(int age) {
			if(age<30&&age>10)
			{
			this.age = age;
			}
		}

		public void setAge(int age) 
		{	
			this.age = age+10;
		}