for loop java 8

java lambda iterate list

List<String> items = new ArrayList<>();
items.add("A");
items.add("B");
items.add("C");
items.add("D");
items.add("E");

//lambda
//Output : A,B,C,D,E
items.forEach(item->System.out.println(item));

//Output : C
items.forEach(item->{
	if("C".equals(item)){
		System.out.println(item);
	}
});

//method reference
//Output : A,B,C,D,E
items.forEach(System.out::println);

//Stream and filter
//Output : B
items.stream()
	.filter(s->s.contains("B"))
	.forEach(System.out::println);

Posted by: Guest on August-11-2020

Source

List<Integer> data = new ArrayList<>(); //Indexed Loop for(int i = 0,size=data.size();i<size;i++){ System.out.println(data.get(i)); } //For each loop for(Integer element : data){ System.out.println(element); } //Using forEach data.forEach(System.out::println); //Using Stream data.stream().forEach(System.out::println) //While loop int i = 0; while(i<data.size()){ System.out.println(data.get(i++)); }

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