Difference between Java program string '==' operator and equals() method

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In this tutorial, we will learn to distinguish between the '==' operator and the equals() method in Java

Example1Java program to distinguish between '==' operator and equals() method

class Main {
　　class Main {
　　　　String name1　public static void main(String[] args) {3= new String("w
　　　　String name2　public static void main(String[] args) {3= new String("w
　　　　System.out.println("Check if two strings are equal");
　　　　//Check if two strings are equal
　　　　//　using the == operator
　　　　boolean result1　= (name1　== name2);
　　　　System.out.println("using the == operator: ")　+　result1);
　　　　//using the equals() method
　　　　boolean result2　= name1.equals(name2);
　　　　System.out.println("Using equals(): ")　+　result2);
　　}
}

Output Result

Check if two strings are equal
using the '==' operator: false
using the equals() method: true

In the above example, we used the '==' operator and the equals() method to check if two strings are equal. Here,

• The '==' operator checks the equality of the string object'swhether the reference is equalHere, name1 and name2are two different parameters. Therefore, it returns false.

• equals() checks the equality of the string object'swhether the content is equalHere, the object name1and name2The content is the same:w3codeboxTherefore, it returns true.

Example2The difference between the '==' operator and the equals() method

class Main {
　　class Main {
　　　　String name1　public static void main(String[] args) {3= new String("w
　　　　String name2　= name1;
　　　　System.out.println("Check if two strings are equal");
　　　　//Check if two strings are equal
　　　　//using the == operator
　　　　boolean result1　= (name1　== name2);
　　　　System.out.println("using the == operator: ")　+　result1);
　　　　//using the equals() method
　　　　boolean result2　= name1.equals(name2);
　　　　System.out.println("using the equals() method: ")　+　result2);
　　}
}

Output Result

Check if two strings are equal
using the == operator: true
using the equals() method: true

Here, name1and name2Both are pointing to the same object. Therefore, name1 == name2 Return true.

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