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Java

Posted by Darin Thompson
Darin Thompson
5,305 Points

How to use regular for loop instead of 'Enhanced for loop'

While watching this vide and coding along on my own machine I realized that the example uses an enhanced loop instead of a regular for loop. I have been trying and searching for hours trying to get it to work using a regular loop and I can't seem to find the solution.

This is my code. Any help would be appreciated.

*I ran the code just fine when following the tutorial so I know the error isn't in another file or anything like that.

import java.util.*;
import com.teamtreehouse.Treet;

public class Example {

  public static void main(String[] args) {
    Treet treet = new Treet(
       "darinthompson",
       "@This is my first #tweet from my tweet app",
       new Date(1494354142L)
    );
    System.out.println("The words are:");
    String[] tweetArray = treet.toLowerCase().getWords();
    for (int i = 0; i < tweetArray.length; i++) {
      System.out.println("- " + i);
    }
  }
}
Fahad Mutair
Fahad Mutair
10,359 Points
Fahad Mutair
Fahad Mutair
10,359 Points 
String[] tweetArray = treet.toLowerCase().getWords();
String printWords;
    for (int i = 0; i < tweetArray.length; i++) {
      printWords = tweetArray[i];
      System.out.println(printWords);
    }

2 Answers

Fahad Mutair
Fahad Mutair
10,359 Points
Fahad Mutair
Fahad Mutair
10,359 Points

hi Darin, the Enhanced for loop

//... Foreach loop over all elements in arr.
for (type var : arr) {
    body-of-loop
}

and equivalent for statements

//... For loop using index.
for (int i = 0; i < arr.length; i++) { 
    type var = arr[i];
    body-of-loop
}

here's example

double[] ar = {1.2, 3.0, 0.8};
int sum = 0;
for (double d : ar) {  // d gets successively each value in ar.
    sum += d;
}

double[] ar = {1.2, 3.0, 0.8};
int sum = 0;
for (int i = 0; i < ar.length; i++) {  // i indexes each element successively.
    sum += ar[i];
}

might that helps

Darin Thompson
Darin Thompson
5,305 Points
Darin Thompson
Darin Thompson
5,305 Points

Jazakala Khair habibi! <--- I currently live in the UAE and I am learning arabic, so I figured I would show off a little bit.

Anyway, thanks a lot for the help. Keeping track of the type of variables in Java is hard to do I guess. I can't ever seem to get it right.

Ma asalama!

Fahad Mutair
Fahad Mutair
10,359 Points
Fahad Mutair
Fahad Mutair
10,359 Points

hahaha you're more than welcome