Tambah kelas HelloWolrd.java

Signed-off-by: Yudha <yudha02@gmail.com>
Add main method at HelloWolrd.java

Signed-off-by: Yudha <yudha02@gmail.com>
Add method showWord in HelloWolrd.java and create object in main method.

Signed-off-by: Yudha <yudha02@gmail.com>
Merge remote-tracking branch 'remotes/origin/yudha'