Java에서 객체의 해시 코드는 어떻게 생성됩니까?

hashCode = (h << 5) - h + x

int i = 10;
System.out.println(i.hashCode()); // 输出：10

hashCode = (hashcode1 * 31) + (hashcode2 * 31) + ... + (hashcodeN * 31)

class Person {
    private String name;
    private int age;
    
    public Person(String name, int age) {
        this.name = name;
        this.age = age;
    }
    
    @Override
    public int hashCode() {
        int hash = 0;
        if (name != null) {
            hash += name.hashCode() * 31;
        }
        hash += age * 31;
        return hash;
    }
}

Person p1 = new Person("John", 25);
Person p2 = new Person("John", 25);

System.out.println(p1.hashCode() == p2.hashCode()); // 输出：true