# Way to use a method as parameter
**URL:** https://discourse.processing.org/t/way-to-use-a-method-as-parameter/15494
**Category:** Coding Questions
**Created:** [November 14, 2019, 5:46pm UTC](https://discourse.processing.org/t/way-to-use-a-method-as-parameter/15494 "2019-11-14T17:46:00Z")
**Posts on this page:** 5
**Page:** 1
### Author:  [@NumericPrime](https://discourse.processing.org/u/NumericPrime)
#### Post date: [November 14, 2019, 5:46pm UTC](https://discourse.processing.org/t/way-to-use-a-method-as-parameter/15494/1 "2019-11-14T17:46:00Z")
Hi I’ve been Looking for a way to create a method wich uses an other method for calculating stuff. As I surfed I found that there are methods in specific classes wich can do this for Example in the Library java.awt.event.ActionListener, where you can add a actionListener to a JButton.
It works like this:
```auto
button.addActionListener(new ActionListener(){
void ActionPerformed(ActionEvent e){
// your code stuff
}
}
```
and my question is:
Is there any way of creating a method doing something like that?
I found something about this Topic but Nothing helped me.
> **[Processing 2.x and 3.x Forum](https://forum.processing.org/two/discussion/570/how-to-pass-a-function-method-as-a-parameter-to-another-function-method-callback-function)**
>
> Processing is an electronic sketchbook, a language and a worldwide community. This is its forum.
> [@P5.js: How to use a function as an object parameter](https://discourse.processing.org/t/p5-js-how-to-use-a-function-as-an-object-parameter/14753/5):
>
> Okay, got it. Thank you.
---
### Author:  [@NumericPrime](https://discourse.processing.org/u/NumericPrime)
#### Post date: [November 14, 2019, 5:56pm UTC](https://discourse.processing.org/t/way-to-use-a-method-as-parameter/15494/2 "2019-11-14T17:56:51Z")
Sorry I copied the wrong link! The second selected the wrong message!
---
### Author:  [@Lexyth](https://discourse.processing.org/u/Lexyth)
#### Post date: [November 14, 2019, 6:53pm UTC](https://discourse.processing.org/t/way-to-use-a-method-as-parameter/15494/3 "2019-11-14T18:53:40Z")
You can edit your post, if you posted something wrong.
As for what you are looking for… you are looking for a way to use any method as a Parameter, correct? If so, try using java.lang.reflect.Method class as a parameter. It does pretty much all you are looking for, if i got you right. 😉
Edit :
I might be mistaken, but i think this line :
```auto
private transient volatile AccessControlContext acc =
AccessController.getContext();
```
In the AWTEvent class is what takes the method as an object, though that might be wrong… but that‘s as far as i was able to trace the way of that Code back… So it could actually be anything within AWTEvent class… well, i think it‘s this one. 😅
---
### Author:  [@NumericPrime](https://discourse.processing.org/u/NumericPrime)
#### Post date: [November 14, 2019, 7:56pm UTC](https://discourse.processing.org/t/way-to-use-a-method-as-parameter/15494/4 "2019-11-14T19:56:41Z")
> [@Lexyth](#):
>
> class
Thenk you for the help but could you make a concrete example?
---
### Author:  [@Lexyth](https://discourse.processing.org/u/Lexyth)
#### Post date: [November 14, 2019, 9:00pm UTC](https://discourse.processing.org/t/way-to-use-a-method-as-parameter/15494/5 "2019-11-14T21:00:08Z")
Never mind my last answer, actually the best approach seems to be using lambda expressions in your case. But they are pretty complicated.
As for an example :
```auto
float a = 37;
void setup() {
size(600,400);
}
void draw() {
printTest(new Test());
printTest(new Test() {
void myMethod(float v) {
println(v + 7);
}
});
}
interface Test {
void myMethod(float v);
}
class ActualTest implements Test {
void myMethod(float v) {
println(v);
}
}
void printTest (Test t) {
t.myMethod(a);
}
```
Though a better example is here :
[https://docs.oracle.com/javase/tutorial/java/javaOO/lambdaexpressions.html](https://docs.oracle.com/javase/tutorial/java/javaOO/lambdaexpressions.html)