Array Example Not Working

Question

I'm working my way through a JAVA 6 text book to try and learn the basics of the language but I'm getting an error with code which is straight out of the book.
the program is as follows. import java.util.*;
import java.awt.*;
class HalfDollar {
     public static void main (String[] arguments) {
          int[] denver = { 2500000, 2900000, 3500000 };
          int[] philadelphia = new int[denver.length];
          int[] total = new int[denver.length];
          int average;
          philadelphia[0] = 2500000;
          philadelphia[1] = 2900000;
          philadelphia[2] = 3800000;
          total[0] = denver[0] + philadelphia [0];
          total[1] = denver[1] + philadelphia [1];
          total[2] = denver[2] + philadelphia [2];
          average = (total[0] + total[1] + total[2]) / 3;
          System.out.print("2003 production: ");
          System.out.format("%,d%n", total[0]);
          System.out.print("2004 production: ");
          System.out.format("%,d%n", total[1]);
          System.out.print("2005 production: ");
          System.out.format("%,d%n", total[2]);
          System.out.print("Average production: ");
          System.out.format("%,d%n", average);
}And the error message is the following -
java.lang.Error: Unresolved compilation problems:
     The method format(String, int) is undefined for the type PrintStream
     The method format(String, int) is undefined for the type PrintStream
     The method format(String, int) is undefined for the type PrintStream
     The method format(String, int) is undefined for the type PrintStream
     at HalfDollar.main(HalfDollar.java:21)
Exception in thread "main"
I know that its not liking the System.out.format bit of the code but am not sure how to resolve this.

Answer 1

If you do have 1.5 or later installed then Eclipse must be still using an older version of Java to compile. Go to the properties and change the version Eclipse uses.