Difference between == operator and equals() method

==: This == operator meant for address comparison.
.equals(): This .equals() method meant for contain comparison. Here java and JAVA is consider as different.
.equalsIgnoreCase(): This .equalsIgnoreCase() method meant for contain comparison but this ignore the case. JAVA and java will consider same.

import java.util.*;

public class Main

{

public static void main(String[] args)

{

String str1="JAVA";

String str2="java";

System.out.println(str1==str2);

System.out.println(str1=="JAVA");

System.out.println(str1.equals(str2));

System.out.println(str1.equals("JAVA"));

System.out.println(str1.equalsIgnoreCase(str2));

}

Output:

false

true

false

true

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