2023-12-11, Today I Learned

⭐Arraylist.contains() in Java

// creating an Empty Integer ArrayList
        ArrayList<Integer> arr = new ArrayList<Integer>(4);
 
        // using add() to initialize values
        // [1, 2, 3, 4]
        arr.add(1);
        arr.add(2);
        arr.add(3);
        arr.add(4);
 
        // use contains() to check if the element
        // 2 exits or not
        boolean ans = arr.contains(2);
 
        if (ans)
            System.out.println("The list contains 2");
        else
            System.out.println("The list does not contains 2");

 

⭐java 삼항연산자

int b = (5 < 4) ? 50 : 40;
int d = (a > b) ? a - b : b - a;