Passing Java statements in the parameter list

Question

I am relatively new to Java and have a need to create a method which has a Java statement passed to it in the parameter list. The purpose is to optionally run this statement within the method. For example:
I have a method called rotateAndTranslate that sets up an Affine Transform by saving the existing transform context, creating a new transform, and then invoking that transform. After the new transform is invoked, I would like to have the ability to run different Java graphics commands (or not) before continuing with the remaining portion of the existing method (in this case, restoring the previous transform.
I am not able to find any clear information on how to pass in Java statements and then invoke them.
Can someone help with this? Please keep it simple as I am still trying to get my head around Java and OOP.
Carl

Answer 1

you're talking about closures, more or less, which java doesn't currently have
you can get close to it by using anonymous inner classes. define an interface, say Transformer, and pass instances of that as arguments:
public interface Transformer {
  void transform();
Transformer transformer = new Transformer() {
   public void transform() {
        // do the work here
MyTransformerClass.doTransform(transformer);
...obviously, the MyTransformerClass.doTransform() must take a Transformer as a parameter