Java: Is it possible to always execute a certain function before other functions are called? (Like @Before in JUnit)

Question

Is there a way to always execute a function before any other function of a class is called?

I have a class where I need to refresh some fields always before any func

Answer 1

You can have a protected getter method for data. Access getData method instead of using data field. Child classes will see only getData and will have updated data every time.

public class Example {

    private int data;

    public void function1(){

    }

    public void function2(){

    }

    protected int getData(){
        refresh();
        return data;
    }

    //@BeforeOtherFunction
    private void refresh(){
        // refresh data
    }
}