Java - System.identityHashCode() Examples

[Last Updated: Nov 8, 2025]

Class:

java.lang.System

Method:

public static int identityHashCode(Object x)

Returns the same hash code for the given object as would be returned by the default method hashCode(), whether or not the given object's class overrides hashCode().

Examples

package com.logicbig.example.system;

public class IdentityHashCodeExample {

    public static void main(String... args) {
        String str = "testString";
        System.out.println(System.identityHashCode(str));
    }
}

Output

256338459

package com.logicbig.example.system;

public class IdentityHashCodeExample2 {

    public static void main(String... args) {
        MyClass myClass = new MyClass(20);
        int i = myClass.hashCode();
        System.out.println(i);

        int i2 = System.identityHashCode(myClass);
        System.out.println(i2);
    }

    private static class MyClass {
        private int i = 0;

        public MyClass(int i) {
            this.i = i;
        }

        @Override
        public int hashCode() {
            return i;
        }
    }
}

Output

20
817118299

Java - System.identityHashCode() Examples

Class:

Method:

Examples

Output

Output

See Also