java_5_变量和内存

package com.guoyasoft;

public class Student {
    public String name;
    public int age;
    public Student next;
}

package com.guoyasoft;

public class Test {
public static void main(String[] args) {
    Student a1=new Student();
    a1.name="n1";
    a1.age=1;
    
    Student a2=new Student();
    a2.name="n2";
    a2.age=2;
    a1.next=a2;
    
    Student a3=new Student();
    a3.name="n3";
    a3.age=3;
    a2.next=a3;
    
    Student a4=new Student();
    a4.name="n4";
    a4.age=4;
    a3.next=a4;
    
    
    Student a5=new Student();
    a5.name="n5";
    a5.age=5;
    a4.next=a5;
    
    Student a=a1;
    boolean flag=true;
    while(flag){
        System.out.println("name="+a.name+",age="+a.age);
        a=a.next;
        if(a==null){
            flag=false;
        }
    }
    
//  System.out.println("a1.name="+a1.name);
//  System.out.println("a2.name="+a2.name);
//  System.out.println("a3.name="+a3.name);
//  System.out.println("a4.name="+a4.name);
    
    
}
}