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Java

Posted by Jassim Alhatem
Jassim Alhatem
20,883 Points

Why does '==' return false but '.equals()' returns true with the same given values.

public class test {
    public static void main(String[] args){

        String text = "Good luck everyone";

        text = text.toUpperCase();

        int find_index = text.indexOf("LUCK");
        int find_space = text.indexOf(" ", find_index);

        String find_word = text.substring(find_index, find_space);

        System.out.println("LUCK is in text: " + (find_word.equals("LUCK"))); // returns true
        System.out.println("LUCK is in text: " + (find_word == "LUCK"); // returns false

    }
}

1 Answer

jb30
jb30
44,805 Points

The == operator compares the address of the strings in memory and the .equals method compares the content of the strings.

The == operator is used for primitive types, such as int and char. The .equals method is used for objects.