FinalExam - String Manipulator

package com.company;


import java.util.*;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import java.util.stream.Collectors;

public class Main {

    public static void main(String[] args) {

        Scanner scanner = new Scanner(System.in);

        String text = scanner.nextLine();////Thi5 I5 MY 5trING!//
        String line = scanner.nextLine();//Translate 5 s

        while (!line.equals("End")) {

            String[] tokens = line.split(" +");
            String command = tokens[0];

            if (command.equals("Translate")) {
                char charToReplace = tokens[1].charAt(0);
                char replacer = tokens[2].charAt(0);
                for (int i = 0; i < line.length(); i++) {
                    char currentChar = line.charAt(i);
                    if (currentChar == charToReplace) {
                        text = text.replace(charToReplace, replacer);
                    }

                }
                System.out.println(text);
            } else if (command.equals("Includes")) {
                String toCheck = tokens[1];
                if (text.contains(toCheck)) {
                    System.out.println("True");
                } else {
                    System.out.println("False");
                }
            } else if (command.equals("Start")) {
                String[] textAsArray = text.split(" +");
                String currentStart = textAsArray[0];
                String startToChck = tokens[1];
                if (currentStart.equals(startToChck)) {
                    System.out.println("True");
                } else {
                    System.out.println("False");
                }
            } else if (command.equals("Lowercase")) {
                text = text.toLowerCase();
                System.out.println(text);

            } else if (command.equals("FindIndex")) {
                char index = tokens[1].charAt(0);
                int lastIndexOf = (text.lastIndexOf(index));
                System.out.println(lastIndexOf);

            } else if (command.equals("Remove")) {
                int startIndex = Integer.parseInt(tokens[1]);
                int endIndex = Integer.parseInt(tokens[2]);
                if(startIndex>=0&&endIndex<text.length()){// if (index >= 0 && index < numbers.size())
                    String toRemove = text.substring(startIndex, endIndex);
                    text = text.replace(toRemove, "");
                    System.out.println(text);
                }



            }


            line = scanner.nextLine();
        }

    }
}