[Java] List method that determines whether a specific object is included

list.contains() Determine if there is a specific element and return it as a boolean

	public static void main(String[] args) {
				
		String arr[] = {"orange","apple","cherry","melon","grape"};
		
		List<String> list = new ArrayList<>(Arrays.asList(arr));
		
	if(list.contains("banana")) {
			System.out.println("Exists");
		}else {
			System.out.println("not exist");
		}
	}

list.indexOf() Returns the INDEX number of a particular element as an int, -1 if it does not exist

	public static void main(String[] args) {
				
		String arr[] = {"orange","apple","cherry","melon","grape"};
		
		List<String> list = new ArrayList<>(Arrays.asList(arr));
		
		int x = list.indexOf("orange");
		System.out.println(x); 
		
		if(list.indexOf("orange") != -1) {
			System.out.println("Exists");
		}else {
			System.out.println("not exist");
		}

	}