System.out.println()

1.
class Test {
   public static void main(String[] args) {
      boolean b = false;
      char c = 'A';
      int i = 100;
      double d = 10.5;

      System.out.println(b);
      System.out.println(c);
      System.out.println(i);
      System.out.println(d);
   }
}

2.
class Test {
   public static void main(String[] args) {
      char c = ' ';
      String s = "";
   }
}

3.
class Test {
   public static void main(String[] args) {
      String s = "\"hello\'";
      System.out.println(s);
   }
}