Using An ArrayList To Access Specific Objects Java

- Objects in Java are compared using equals(), and String is an Object in Java, so it follows the same rule.

- == will be used to compare primitive or to check if two or more Object Reference Variables are pointing to the same Object on the heap or not.

- So you should use equals() or equalsIgnoreCase() (if case doesn't matters) to compare the String Objects.

for (String s : myList){
    if (s.equals("Hi"))
        system.out.println("Hello");
}

 if (s == "Hi")

change it to

 if (s.equals("Hi"))

It is always better to use equals() while comparing objects than using == (except String literals)

== compares reference equality. equals() compares object content equality.

You should write below code

for (String s : myList)
    if (s.equals("Hi"))
        system.out.println("Hello"):

You could use s.equalsIgnoreCase("Hi") if you do not care about upper-/lowercase

You should use .equals() method it will check the value of the string while == checke Object reference.

Method name is add(object) not `Add(). Here is an another answer

        List<String> myList = new ArrayList<String>();
        myList.add("Hi");
        myList.add("Pizza");
        myList.add("Can");
        // method 1
        if( myList.contains("Hi")) {
            System.out.println("Found");
        }
        // method 2
        for( String word : myList ) {
            if( word.equals("Hi")) {
                System.out.println("found");
                // break the loop to avoid continues iteration
                break;
            }
        }

Why not use List.contains()?

if (myList.contains("Hi"))
    system.out.println("Hello");