Examples.java

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package com.fermod.example;

import com.fermod.event.ValueChangeListener;
import com.fermod.observer.ObservedValue;

public class Examples {

    public static void main(String[] args) {

        ObservedValue<Integer> observedValue = new ObservedValue<>(0);
        
        // Inline listener registration using lambda
        observedValue.registerListener((oldVAlue, newValue) -> {
            System.out.println("Executed lambda inline code. Old value: " + oldVAlue + " New value: " + newValue);
        });
        
        // Equivalent inline listener registration of the lambda
        observedValue.registerListener(new ValueChangeListener<Integer>() {
            @Override
            public void onValueChanged(Integer oldValue, Integer value) {
                System.out.println("Executed inline code. Old value: " + oldValue + " New value: " + value);
            }
        });
        
        // Register a mothod using method references
        observedValue.registerListener(Examples::printValueChange);

        System.out.println("Change value to 10");
        observedValue.set(10);

    }

    public static void printValueChange(int oldValue, int newValue) {
        System.out.println("Executed printValueChange method. Old value: " + oldValue + " New value: " + newValue);
    }

}