SmashWords.java

//8th kyu
//Write a method that takes an array of words and smashes them together into a sentence and returns the sentence. 
//You can ignore any need to sanitize words or add punctuation, but you should add spaces between each word. 
//Be careful, there shouldn't be a space at the beginning or the end of the sentence!
//Example: ['hello', 'world', 'this', 'is', 'great']  =>  'hello world this is great'

import java.util.Arrays;

public class SmashWords {

	public static String smash(String... words) {
    // TODO Write your code below this comment please
    if (words.length == 0 || words == null){ //checks if empty array or null
      return ""; //returns empty string
    }
    int n = words.length; //array's length
    String newString = words[0]; //ensures newString starts with the first word
    String spaces = " "; //space used to seperate words
    for (int i = 1; i < n; i++){ //starts at 1 because the first word is already part of newString
      newString += spaces + words[i]; //adds a space and the next word in the array to newString
    }
    return newString; //returns newString
  }
  public static void main(String[] args){
    System.out.println(smash("hello", "my", "name", "is", "haani")); //test
  }
}