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+//---------------------------------------%0A// My Answer for CodeIQ Q431%0A// Author Leonardone @ NEETSDKASU%0A//---------------------------------------%0A//CodeIQ  Q431%0A// https://codeiq.jp/ace/cielavenir/q431%0A//---------------------------------------%0A%0A// Java%0Apackage codeiq;%0Aclass JavaHelloWorld %7B%0A%09public static void main(String%5B%5D args) %7B%0A%09%09int one = (int)Math.signum(Math.PI);%0A%09%09int two = one + one;%0A%09%09int four = two + two;%0A%09%09StringBuilder sb = new StringBuilder(new JavaHelloWorld().getClass().getName());%0A%09%09sb.delete(one - one, sb.length() - four - four - two);%0A%09%09sb.insert(one + four, new java.util.Date().toString().charAt(one + two));%0A%09%09System.out.println(sb.toString());%0A%09%7D%09%0A%7D%0A

Create JavaHelloWorld.java