LinearSearch.java

public final class LinearSearch {

   private static final int[] data = {3, -4, 2, 7, 9, 12, -5, 23};

   public static void main (final String[] args) {
      final int x = Integer.parseInt (args[0]);
      int index = -1;
      for (int i=0; index==-1 && i<data.length; i++) {
         if (data[i] == x) {
            index = i;
         }
      }

      if (index == -1) {
         System.out.printf ("Did not find %d%n", x);
      } else {
         System.out.printf ("Found %d at position %d%n", x, index);
      }
   }
}