YOU SAID:
I should become the best java-developer in the world!
INTO JAPANESE
私は世界最高のJava開発者になるべきです!
BACK INTO ENGLISH
I should be the best Java developer in the world!
INTO JAPANESE
私は世界最高のJava開発者でなければなりません!
BACK INTO ENGLISH
I must be the best Java developer in the world!
INTO JAPANESE
私は世界最高のJava開発者でなければなりません!
BACK INTO ENGLISH
I must be the best Java developer in the world!
You've done this before, haven't you.