String,StringBuffer,StringBuilder using == Operator.

public static void main(String[] args) {
// TODO Auto-generated method stub

    // Primitive Data Types:
        int no1 = 10;
            int no2 = 10;
            System.out.println(no1 == no2);    // == operator comparing the value.
            //Output: "true"

            // Non Primitive Data Types--->    "String"
            // with new keyword using string
            String s1 = new String("hello");
            String s2 = new String("hello");  
            System.out.println(s1 == s2);     // == Operator comparing the object.
            //Output: "False"

            System.out.println(s1.equals(s2)); // equals() method is used to compare the value.
            //Output: "False" 

            // Without new keyword using string
            String a1 = "welcome";
            String a2 = "welcome";
            System.out.println(a1 == a2);      // == operator comparing the value because its having same value for both variables on same location.
            System.out.println(a1.equals(a2)); // equals() method is used to compare the value. 



    //StringBuffer 
            StringBuffer sb1 = new StringBuffer("java");
            StringBuffer sb2 = new StringBuffer("java");
            System.out.println(sb1 == sb2);                   
            // StringBuffer objects are created on the heap, and even if they have the same content,new StringBuffer() creates distinct objects in memory
            //Output: "False"
            System.out.println(sb1.equals(sb2));  
            //The equals() method in StringBuffer (and StringBuilder) is inherited from Object and by default performs a reference comparison
            //Output: "False"

    //StringBuilder
            StringBuilder sg1 = new StringBuilder("sql");
            StringBuilder sg2 = new StringBuilder("sql");
            System.out.println(sg1 == sg2); 
            //StringBuilder objects are created on the heap, and even if they have the same content,new StringBuilder() creates distinct objects in memor
            //Output: "False"
            System.out.println(sg1.equals(sg2));
            //The equals() method in StringBuilder is inherited from Object and by default performs a reference comparison
            //Output: "False"
}

}