What is predicate in Java 8?

In Java 8, Predicate a functional interface used as the assignment target for a lambda expression or method reference.

You may use them anywhere where you need to evaluate a condition on group/collection of similar objects such that evaluation can result either in true or false.

	public static void main(String[] args) {
		List<Integer> intList = new ArrayList<Integer>();
		intList.add(1);
		intList.add(2);
		intList.add(3);
		intList.add(4);
		intList.add(5);
		intList.add(6);
		intList.forEach(i -> {
			System.out.println(i);
		});

		// Filter elements that has value greater than 4
		
		Predicate<Integer> filter = i -> i > 4;

		intList.removeIf(filter);
		System.out.println("After applying removeIf function");

		intList.forEach(i -> {
			System.out.println(i);
		});

	}

}

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