public class HelloWorld 
{
	public static void main(String[] args)
	{
		Person ming = new Person();
		System.out.println(ming.getNameAndAge("ming"));
		Person hong = new Person();
		System.out.println(hong.getNameAndAge("hong",20));
	}
}

class Person
{
	private String name;
	private int age;
	
	
	//单参
	public  String getNameAndAge(String name)
	{
		this.name = name;
		return this.name;
	}
	//多参
	public  String getNameAndAge(String name,int age)
	{
		this.name = name;
		this.age = age;
		return  "name is " + this.name +", age is " + this.age;
	}
}