Introduction to Programming

isNull() and nonNull()

These two methods are just thin wrappers around Boolean expressions, obj == null and  obj != null:

• boolean isNull(Object obj): returns the same value as obj == null
• boolean nonNull(Object obj): returns the same value as obj != null

And here is the demo code:

String object = null;System.out.println(object == null);           //prints: trueSystem.out.println(Objects.isNull(object));   //prints: trueSystem.out.println(object != null);           //prints: falseSystem.out.println(Objects.nonNull(object));  //prints: false