code

// Author: Kyle Quirk

import java.util.Scanner;

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

      String userInput;
      String userAcronym;

      System.out.println("Enter text:");
      userInput = scnr.nextLine();

      System.out.println("You entered: " + userInput);
      userInput = userInput.toUpperCase();

      if(userInput.substring(userInput.indexOf("BFF"), userInput.lastIndexOf("BFF")) == "BFF") {
         System.out.println("BFF: best friend forever");
         }
      if(userInput.substring(userInput.indexOf("IDK"), userInput.lastIndexOf("IDK")) == "IDK") {
            System.out.println("IDK: I don't know");
      }
      if(userInput.substring(userInput.indexOf("JK"), userInput.lastIndexOf("JK")) == "JK") {
            System.out.println("JK: just kidding");
      }
      if(userInput.substring(userInput.indexOf("LOL"), userInput.lastIndexOf("LOL")) == "LOL") {
            System.out.println("LOL: laughing out loud");
      }
      if(userInput.substring(userInput.indexOf("TTYL"), userInput.lastIndexOf("TTYL")) == "TTYL") {
            System.out.println("TTYL: talk to you later");
      }

      return;
   }
}