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If arrObjects is an array of instances of a class that defines the doSomething() method, that should work.

Look at the statement the compiler error is on.


What is it that you did there?

If you want to use a String to get a reference to an existing instance of a class, use a Map. Something like:...

The compiler can not find the method: doSomething() in the String class.
The arrObjectNames array holds String objects.

That method is in the TestThing class. You need to have a reference to an...

The compiler recognizes a method call by the ()s at the end of the symbol.
doSomething is missing the ()s

No problem. I'll wait until you can try the code you are asking about with a compiler to see what happens.
Copy any error messages and paste them here with the code.
Be sure to wrap the code in...

referenceToClass.methodName(argsToMethod);

1) Have an arraylist in the Author's class that contains the books he wrote
and/or have a field in the Book class that has the address of the Author that wrote it.

2) Not sure what the problem...