Question

I know there is already many question about turning a string into runnable code, but my question is a little different. Lets say you have a class with a method called: public boolean isSame(boolean a, boolean b), and a String that contains: "if(a == b) { return true; } return false". Is there a way to add the contents of the string to the code of the method? So the final result will be:

public boolean isSame(boolean a, boolean b){
    if(a == b){
        return true;
    }
    return false;
}

Thank you very much.

Edit: I totally understand if this is not possible, but it is worth asking :).

Answer 1

Perhaps you could use the BECL library – it’s a byte code engineering library that, although not renowned for performance, is renowned for ease of use.

The thing that makes it interesting in your case:

Unlike other byte code engineering libraries that provide an abstraction on top of byte-code, it works by decompiling a class, weaving in the required code and then compiling it again. . . and this happens for the the class loading phase. . . theoretically this would allow you to insert valid code in a string format before or after the original method invocation.

Essentially using the compiler as per suggestions in the comments section of your question, but does a little extra work for you.