What does the compareTo do in Java?

The compareTo() method in Java compares two strings lexicographically.

Example

Live Demo

public class Test {    public static void main(String args[]) {       String str1 = "Strings are immutable";       String str2 = new String("Strings are immutable");       String str3 = new String("Integers are not immutable");       int result = str1.compareTo( str2 );       System.out.println(result);       result = str2.compareTo( str3 );       System.out.println(result);    } }

Output

0 10