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Java Java Arrays Iteration Looping Like These Programmers

Posted by YZ L
YZ L
6,184 Points

unenchanced for loop

What am I doing wrong?

Programmers.java 
public class Programmers {

  public void printMenu() {
    String[] programmers = {
            "Yukihiro Matsumoto",
            "David Nolen",
            "Grace Hopper",
            "Linus Torvalds",
            "You"
    };

    System.out.println("Choose a programmer:");

    for (int i = 0; i < programmers.length; i++) {
      System.out.printf("%d. %d %n",
                       i + 1,
                       programmers[i]);
    }
    /*
    int n = 0;
    for (String person : programmers) {
      n++;
      System.out.printf("%d. %d%n",
                       n,
                       person);
    }
    // TODO: Print out a menu by looping through the programmers array.

      The menu should be in the form of (each on a line of its own, starting with 1):
      1. Yukihiro Matsumoto
      2. David Nolen
      ...
    */


  }

}

1 Answer

Isaiah Duncan
Isaiah Duncan
3,241 Points
Isaiah Duncan
Isaiah Duncan
3,241 Points

The issue is that you are trying to insert a string where there should be a number. 

for (int i = 0; i < programmers.length; i++) {
      System.out.printf("%d. %d %n", //<--- The %d character is a placeholder for decimal integers.
                       i + 1,
                       programmers[i]); //<--- this is trying to insert a String.
    }

Your printf should look more like:

System.out.printf("%d. %s%n", i + 1, programmers[i]); //<--- notice the %s instead of %d

For more details, check out this link: Formatting with printf() in Java.

YZ L
YZ L
6,184 Points

thank you!!!

Isaiah Duncan
Isaiah Duncan
3,241 Points
Isaiah Duncan
Isaiah Duncan
3,241 Points

You're welcome. Happy coding! :)