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JavaAdvanced#puzzle#oop
JavaIntermediate#puzzle#arrays
What is the output of this array comparison? int[] a = {1, 2, 3}; int[] b = {1, 2, 3}; System.out.println(a == b); System.out.println(a.equals(b)); System.out.println(Arrays.equals(a, b));
Arrays don't override equals(), so both a == b and a.equals(b) compare references and are false since they're different array objects. Arrays.equals() compares element-by-element content, so it correctly returns true.
Example
int[] a = {1,2,3}, b = {1,2,3};
System.out.println(a == b); // false
System.out.println(a.equals(b)); // false
System.out.println(Arrays.equals(a, b)); // true