Java Program to Highlight Syntax

Problem Statement: 
We need to highlight words in a sentence that matches a given list of keywords. Matched words should be surrounded by "[blue]".

Sample Input:
If my code contains many for loops or while loops then my program may run slow. 

Keywords List:
if, else, then, until, while, do , for

Sample Output:
[blue]If[blue] my code contains many [blue]for[blue] loops or [blue]while[blue] loops [blue]then[blue] my program may run slow.

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Solution: SyntaxHighlighter.java

package com.hellojavatech.syntaxhighlight;

import java.util.ArrayList;
import java.util.Scanner;

public class SyntaxHighlighter {

public static void main(String[] args) {

Scanner sc = new Scanner(System.in);
System.out.println("Enter a Sentence: ");
String userInput = sc.nextLine();

ArrayList keywords = new ArrayList();
keywords.add("if");
keywords.add("else");
keywords.add("then");
keywords.add("until");
keywords.add("while");
keywords.add("do");
keywords.add("for");

StringBuilder tempString = new StringBuilder();
String[] splitInput = userInput.split(" ");

for (String word : splitInput) {
if(keywords.contains(word)){
tempString.append("[blue]"+word+"[blue]");
}
else{
tempString.append(word);
}
tempString.append(" ");
}

String highlightedString = tempString.toString().trim();

System.out.println("Text after Syntax Highlighting is: ");
System.out.println(highlightedString);
}
}

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Here is the link to the "Industry Standard" version of this code.

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