Rava2 - Java Source Interpreter

// retoor <retoor@molodetz.nl>

public class Main {
    static long sum1 = 0;
    static long sum2 = 0;
    static long sum3 = 0;
    static long sum4 = 0;

public static void main(String[] args) {
        System.out.println("=== Parallel Sum Computation ===\n");

int n = 1000;
        System.out.println("Computing sum of 1 to " + n + " using 4 threads\n");

Thread t1 = new Thread(() -> {
            computeSum(1, 250, 1);
        });

Thread t2 = new Thread(() -> {
            computeSum(251, 500, 2);
        });

Thread t3 = new Thread(() -> {
            computeSum(501, 750, 3);
        });

Thread t4 = new Thread(() -> {
            computeSum(751, 1000, 4);
        });

long startTime = System.currentTimeMillis();

t1.start();
        t2.start();
        t3.start();
        t4.start();

t1.join();
        t2.join();
        t3.join();
        t4.join();

long endTime = System.currentTimeMillis();

System.out.println("\nPartial sums:");
        System.out.println("  Thread-1 (1-250): " + sum1);
        System.out.println("  Thread-2 (251-500): " + sum2);
        System.out.println("  Thread-3 (501-750): " + sum3);
        System.out.println("  Thread-4 (751-1000): " + sum4);

long total = sum1 + sum2 + sum3 + sum4;
        long expected = (long)n * (n + 1) / 2;

System.out.println("\nTotal: " + total);
        System.out.println("Expected: " + expected);
        System.out.println("Match: " + (total == expected));
        System.out.println("Time: " + (endTime - startTime) + "ms");
    }

static void computeSum(int start, int end, int threadNum) {
        System.out.println("[Thread-" + threadNum + "] Computing " + start + " to " + end);
        long sum = 0;
        for (int i = start; i <= end; i++) {
            sum += i;
        }
        if (threadNum == 1) sum1 = sum;
        else if (threadNum == 2) sum2 = sum;
        else if (threadNum == 3) sum3 = sum;
        else if (threadNum == 4) sum4 = sum;
        System.out.println("[Thread-" + threadNum + "] Result: " + sum);
    }
}

ready