class HelloWorldAssertion {
  public static void main (String[] args) {
    try {
      assertionTest();
    } catch (AssertionError e) {
      e.printStackTrace();
    }
  }
  private static void assertionTest() {
    // わざとfalseを指定してAssertionErrorをスローさせる
    assert false : "AssertionErrorでHello World";
  }
}