check if object is equal to another object java in hashest

1
2public class EqualsAndHashCodeExample {
3
4    public static void main(String... equalsExplanation) {
5        System.out.println(new Simpson("Homer", 35, 120)
6                 .equals(new Simpson("Homer",35,120)));
7        
8        System.out.println(new Simpson("Bart", 10, 120)
9                 .equals(new Simpson("El Barto", 10, 45)));
10        
11        System.out.println(new Simpson("Lisa", 54, 60)
12                 .equals(new Object()));
13    }
14	
15    static class Simpson {
16
17        private String name;
18        private int age;
19        private int weight;
20
21        public Simpson(String name, int age, int weight) {
22            this.name = name;
23            this.age = age;
24            this.weight = weight;
25        }
26
27        @Override
28        public boolean equals(Object o) {
29            if (this == o) {
30                return true;
31            }
32            if (o == null || getClass() != o.getClass()) {
33                return false;
34            }
35            Simpson simpson = (Simpson) o;
36            return age == simpson.age &&
37                    weight == simpson.weight &&
38                    name.equals(simpson.name);
39        }
40    }
41
42}