Whats wrong with my code ?!

Question

import java.util.Scanner;

public class Program{
public static void main(String [] args){
Scanner sc = new Scanner(System.in);
String str = sc.nextLine();
str = str.replace('x', '\u0000');
if(str.contains("$T")==true || str.contains("T

Answer 1

Congratulations, nice idea 👍
Try it this way:

str = str.replace("x", "");

This \u0000 will only not be printed, but is still there and will be considered as contained in the string.