java中堆記憶體和棧記憶體的分配

class Person{
    private String name;
    private int age;
    public Person()//無參的構造方法
    {
        System.out.println("*******************");
    }
    public Person(String s,int a){//構造方法的過載
        name=s;
        age=a;
    } 
    public void setName(String n){ //用setter方法設定引數
 

        name=n;
    }
    public String getName(){//用getter方法設定引數
        return name;
    }
    public void setAge(int a){
        if(a>0&&a<200){
        age=a;
        }
        else
        System.out.println("Enter error,plase Enter anagin");
    }
    public int getAge(){
        return
 
 age;
    }
    public void print(){
        System.out.println("name :"+name+"\t"+"age :"+age);
    }
}
public class Day6{
    public static void main(String[] args){
        Person per=new Person("李四",-20);
        per.setName("張三");
        per.setAge(20);
        per.print();
        String name=per.
 
getName();
        int age=per.getAge();
        System.out.println(name); 
        System.out.println(age);
        Person per1=new Person();
        per1=per;//物件引用

    }
}