java8_example_5.java

// Traditional Method
public static void main(String[] args) {

	List<String> lines = Arrays.asList("apple", "banana", "grape");
	List<String> result = getFilterOutput(lines, "grape");
	for (String temp : result) {
	    System.out.println(temp);    //output : apple, banana
	}

}

private static List<String> getFilterOutput(List<String> lines, String filter) {
	List<String> result = new ArrayList<>();
	for (String line : lines) {
	    if (!filter.equals(line)) { // except grape
		result.add(line);
	    }
	}
	return result;
}

// Using Stream API
public static void main(String[] args) {

	List<String> lines = Arrays.asList("apple", "banana", "grape");

	List<String> result = lines.stream()                // convert list to stream
		.filter(line -> !"grape".equals(line))      // except grape
		.collect(Collectors.toList());              // collect the output and convert streams to a List

	result.forEach(System.out::println);                //output : apple, banana

}