ArraysInRecords.java

package test.sample;

import java.util.Arrays;
import java.util.Objects;

/**
 * How does a record handle arrays in equals and hashCode?
 * 
 * @author nick
 *
 */
public class ArraysInRecords {
	
	record Rec(int[] arr) {}
	
	public static void main(String[] args) {
		int[] arr1 = {1};
		int[] arr2 = {1};
		
		
		System.out.println(arr1.equals(arr2)); // array equals - false
		System.out.println(Objects.equals(arr1, arr2)); // Objects.equals - false
		
		Rec r1 = new Rec(arr1);
		Rec r2 = new Rec(arr2);
		
		System.out.println(Arrays.equals(r1.arr(), r2.arr())); // arrays of the two records have equal content - true
		
		System.out.println(r1.equals(r2)); // record built-in equals - false
		
		System.out.println(r1.hashCode() == r2.hashCode()); // record built-in hashcode - different values for the two records - false
		
	}

}