Double Literally Result False [duplicate]

问题

This question already has answers here:

Why is 128==128 false but 127==127 is true when comparing Integer wrappers in Java? (6 answers)

How to properly compare two Integers in Java? (10 answers)

Closed 10 months ago.

My Question about Wrapper classes. Case 1: I'm Declaring two Integer variables and assigning same values 127, and i'm printing both hashCode. It's Generated same hashCode and result will be printed true. But In Case 2: Generated the Same hashCode but result will be printing false. Please Could you relate. Why Printing a false result.

package com.oca.test.exam;

public class TestCasesIntegerAndDouble {

    public static void main(String[] args) {

        //Case 1:
        Integer i1 = 127;
        Integer i2 = 127;

        System.out.println(i1.hashCode()); //127
        System.out.println(i2.hashCode()); //127
        System.out.println(i1 == i2); //true

        //Case 2:
        Double d1 = 127.0;
        Double d2 = 127.0;

        System.out.println(d1.hashCode());//1080016896
        System.out.println(d2.hashCode());//1080016896
        System.out.println(d1 == d2); //false
    }
}

来源：https://stackoverflow.com/questions/54918661/double-literally-result-false