DrJava Legacy SVN Repository

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/** For-each works on a primitive array */
test {
  int[] array = new int[] { 1, 2, 3, 4 };
  int sum = 0;
  for (int x : array) { sum = sum + x; }
  assert (sum == 10);
}

/** For-each works on an array of objects */
test {
  String[] array = new String[] { "Abc", "Def", "Ghi" };
  String concat = "";
  for (String s : array) { concat = concat + s; }
  assert (concat.equals("AbcDefGhi"));
}

/** For-each works on a List */
test {
  java.util.List<String> l = new java.util.LinkedList<String>();
  l.add("Abc");
  l.add("Def");
  l.add("Ghi");
  String concat = "";
  for (String s : l) { concat = concat + s; }
  assert (concat.equals("AbcDefGhi"));
}

/** For-each works on a Collection */
test {
  java.util.Collection<String> l = new java.util.LinkedList<String>();
  l.add("Abc");
  l.add("Def");
  l.add("Ghi");
  String concat = "";
  for (String s : l) { concat = concat + s; }
  assert (concat.equals("AbcDefGhi"));
}

/** For-each works on an Iterable */
test {
  class Nums implements Iterable<Integer> {
    public java.util.Iterator<Integer> iterator() {
      java.util.List<Integer> l = new java.util.LinkedList<Integer>();
      l.add(new Integer(1));
      l.add(new Integer(2));
      l.add(new Integer(3));
      l.add(new Integer(4));
      return l.iterator();
    }
  };
  
  Nums iterable = new Nums();
  int sum = 0;
  for (Integer i : iterable) { sum = sum + i.intValue(); }
  assert (sum == 10);
}

/** Nested for-each works properly */
test {
  String result = "";
  for (String s1 : new String[]{"a", "b", "c"}) {
    for (String s2 : new String[]{"1", "2", "3"}) {
      result = result + s1 + s2 + ".";
    }
  }
  assert (result.equals("a1.a2.a3.b1.b2.b3.c1.c2.c3."));
}