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, 7, 8, 9, 6, 5);
        IntWrapper variableOutside = new IntWrapper(50);
        Consumer<Integer> consumer = i -> {
            int variableInside = 70;
            System.out.println(variableOutside.getInt());
            variableOutside.incr(); // Imagine multi-thread environment calling this
            variableInside++;
            System.out.printf("%s plus %d plus %d equals %d\n", variableOutside, variableInside, i,
                    variableOutside.getInt() + variableInside + i);
        };
        variableOutside.incr(); // Now it's the variableOutside starts from 51
        l.forEach(consumer);
    }
}

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;
    }
}