// Project: Multithreading
// Source code file: Adder.java
// Show how to use threads to add numbers in parallel.
// A class that implements Runnable can be run in a thread.

public class Adder implements Runnable {
    private int total, start, end;

    public Adder(int start, int end) {
        this.start = start;
        this.end = end;
    }

    public int getTotal( ) {
        return this.total;
    }

    // Required method for Runnable interface.
    @Override
    public void run( ) {
        int sum = 0;
        for (int i = this.start; i < this.end; i++) {
            sum += i;
        }
        this.total = sum;
        System.out.println("Start: " + this.start +
                " End: " + this.end + " Total: " + this.total);
    }
}