Write a java program to compare two strings lexicographicall

Write a java program to compare two strings lexicographically.

Using the compareTo method for comparing the String .
compareTo method is compare the string is based on the unicode value of character .
It return the positive negative and zero value.
if the string are same it return the zero value otherwise it positive or negative value depend on ASCII value of the character .
for example
1st string is s1 = middle
2nd string is s2 = niddle
so it return the value is -1.
bcoz the value of m is 77 and value of n is 78 (ASCII)
so 77 -78 = -1
so the return value is -1 .

import java.util.*;

class Main {

public static void main(String[] args) {

Scanner obj = new Scanner(System.in);

String s1;

String s2;

s1 = obj.nextLine();

s2 =obj.nextLine();

if(s1.compareTo(s2)==0){

System.out.println("string are equal"); }

else{

System.out.println("not "+s1.compareTo(s2)+" is difference ");

} } }

Output:  

  oneo

  oneof

  not -1 is difference.