MOBILE NO CHECK IN JAVA

package javaapplication4;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;

public class Main {

     public static void main(String[] args) throws IOException{

    String str1=new String();
    String str2=new String();
    BufferedReader str = new BufferedReader(new InputStreamReader(System.in));

    System.out.println("Enter Mobile No:");
    str1=str.readLine();
    System.out.println("Enter again:");
    str2=str.readLine();
    MobileCheck ank=new MobileCheck(str1, str2);

    }

}

class MobileCheck {
    String s1,s2;

    public MobileCheck(String str1,String str2) {
        s1=str1;
        s2=str2;
        int i=0;
      //  System.out.println(s1.startsWith(String.valueOf(0)));
        while(s1.startsWith(String.valueOf(0))){

            s1=s1.substring(i);
          //  System.out.println(s1);
            i++;
        }
        while(s2.startsWith(String.valueOf(0))){

            s2=s2.substring(i);
            i++;
        }

        if(s1.length()==s2.length()){
            System.out.println("mobile no is "+s1.equals(s2));
        }
        else if(s1.length()>s2.length()){

            i=s1.length()-s2.length();
            s1=s1.substring(i);
            System.out.println("Mobile no is "+s1.equals(s2));
                    }
        else{
            i=s2.length()-s1.length();
            s2=s2.substring(i);
            System.out.println("Mobile no is "+s1.equals(s2));
        }
    }


}