String comparison

Question

Could anyone please tell me, how could i compare an user input string with the already defined string

Answer 1

Make sure you utilize nextLine() with your scanner so you can obtain the entire string, rather than just the first word. After you've done that, use the String method `compareTo()` to compare the strings. If it's not a match, it'll return an int value of 0, and if it does match, it'll be something other than 0.

Hope this helps. Good luck!

https://code.sololearn.com/cVBO1OKL3fzH/#java

import java.util.Scanner;
public class Program {

public static void main(String[] args) {
Scanner scnr = new Scanner(System.in);

String inputStr = "";
String knownStr = "This is already known.";

inputStr = scnr.nextLine();

System.out.println("User String: " + inputStr);
System.out.println("Known String: " + knownStr);
System.out.print("Comparison: ");

if(inputStr.compareTo(knownStr) == 0) {
System.out.println("Strings match!");
}
else {
System.out.println("Strings do not match!");
}
}
}

Answer 2

By the way, it's worth mentioning, that it compares the strings very literally. So that means it's case-sensitive and "this is already known." and "This is already known." is technically different strings.

int compareToIgnoreCase(String str)

^That'll let you compare and ignore the casing of the letters if you need that option.

Good luck to you!