I happened to be some of those unlucky souls who admired Java and almost mastered it...but then when I got to Competitive Programming, I realized the constraints of Java, especially TLEs. Moreover, the current setup for ZCO has no proper debugger for Java. What should I do?

I have minor experience C++, which is not at all sufficient for CP. How should I get to learn C++ for CP in a span of less than a week!

Anybody who replies will help all those people who have strived on Java for CP.