Main.java Source code

Introduction

Here is the source code for Main.java

Source

import java.util.Arrays;
import java.util.List;
import java.util.function.Consumer;

public class Main {
    public static void main(String[] args) {
        List<Integer> l = Arrays.asList(1, 3, 2, 4);
        l.forEach(getConsumer(10));
    }

    public static Consumer<Integer> getConsumer(int multiplier) {
        IntWrapper iWrapper = new IntWrapper(10);
        Consumer<Integer> lambdaToReturn = x -> {
            System.out.println(x * iWrapper.getInt() * multiplier);
        };
        iWrapper.incr(); // Even we increment it later,  lambda still get 11
                         // instead of 10
        return lambdaToReturn;
    }

}

class IntWrapper {
    private int data;

    public IntWrapper(int i) {
        this.data = i;
    }

    public String toString() {
        return this.data + "";
    }

    public void incr() {
        this.data++;
    }

    public int getInt() {
        return this.data;
    }
}