BX_BOXING_IMMEDIATELY_UNBOXED

Bx: Primitive value is boxed and then immediately unboxed
把原始型態如int，宣告為boxed的物件如Interger，並透過它提供的intValue去取得原始型態的值。

A primitive is boxed, and then immediately unboxed. This probably is due to a manual boxing in a place where an unboxed value is required, thus forcing the compiler to immediately undo the work of the boxing.
這是不必要的動作，所以根本不用做boxed的動作。

Before:

	public boolean checkResult(){
		return getResult() == new Double(0);
	}

getResult取得為double型態，而比較的值為0，因此只需要將new Double(0)改為0.0即可。

After:

	public boolean checkResult(){
		return getResult() == 0.0;
	}

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