1：代码：

 1 package com.lieyan;
 2 
 3 public class TestStudent {
 4     public static void main(String[] args) {
 5 
 6         // getClass方法
 7         Student s1 = new Student("aaa", 20);
 8         Student s2 = new Student("bbb", 22);
 9         // 输出类型  同为Student类型
10         System.out.println(s1.getClass());
11         System.out.println(s2.getClass());
12         System.out.println("================================");
13 
14         //hasCode方法
15         System.out.println(s1.hashCode());
16         System.out.println(s2.hashCode());
17         Student s3 = s1;
18         System.out.println(s3.hashCode());
19         System.out.println("================================");
20 
21         // toString方法
22         System.out.println(s1);
23         System.out.println(s2.toString());
24         System.out.println("================================");
25 
26         // euqals方法，判断两个对象是否相等
27         System.out.println(s1.equals(s2));
28         System.out.println(s1.equals(s3));
29 
30         Student s4 = new Student("xiaoa", 1);
31         Student s5 = new Student("xiaoa", 1);
32         System.out.println(s4.equals(s5));
33     }
34 }

2：结果

 1 class com.lieyan.Student
 2 class com.lieyan.Student
 3 ================================
 4 1846274136
 5 1639705018
 6 1846274136
 7 ================================
 8 Student{name='aaa', age=20}
 9 Student{name='bbb', age=22}
10 ================================
11 false
12 true
13 false