What is the difference between equals() and ==?

Posted in: Java interview questions
 == operator is used to compare the references of the objects.
public bollean equals(Object o) is the method provided by the Object class. The default implementation uses == operator to compare two objects.
But since the method can be overriden like for String class. equals() method can be used to compare the values of two objects.

 String str1 = "MyName";
 String str2 = "MyName";
 String str3 = str2;

 if(str1 == str2){
 System.out.println("Objects are equal")
 }else{
 System.out.println("Objects are not equal")
 }

 if(str1.equals(str2)){
 System.out.println("Objects are equal")
 }else{
 System.out.println("Objects are not equal")
 }

 Output:

 Objects are not equal
 Objects are equal

 String str2 = "MyName";
 String str3 = str2;

 if(str2 == str3){
 System.out.println("Objects are equal")
 }else{
 System.out.println("Objects are not equal")
 }

 if(str3.equals(str2)){
 System.out.println("Objects are equal")
 }else{
 System.out.println("Objects are not equal")
 }

 OutPut:
 Objects are equal
 Objects are equal