Using java threads

Author: dalmia

4-Multithreaded programming/java/Sum.class

@@ -0,0 +1,56 @@
+import java.io.*;
+
+class Sum
+{
+ private int sum;
+
+ public int getSum(){
+ return sum;
+ }
+
+ public void setSum(int sum){
+ this.sum = sum;
+ }
+}
+
+class Summation implements Runnable
+{
+ private int upper;
+ private Sum sumValue;
+
+ public Summation(int upper, Sum sumValue){
+ this.upper = upper;
+ this.sumValue = sumValue;
+ }
+
+ public void run(){
+ int sum = 0;
+ for(int i=0; i<=upper; i++){
+ sum += i;
+ }
+ sumValue.setSum(sum);
+ }
+}
+
+public class summation
+{
+ public static void main(String[] args){
+ if(args.length > 0){
+ if(Integer.parseInt(args[0]) < 0)
+ System.err.println(args[0] + " must be >= 0.");
+ else{
+ Sum sumObject = new Sum();
+ int upper = Integer.parseInt(args[0]);
+ Thread thread = new Thread(new Summation(upper, sumObject));
+ thread.start();
+ try{
+ thread.join();
+ System.out.println("sum = " + sumObject.getSum());
+ }catch(InterruptedException ie){
+ System.err.println(ie);
+ }
+ }
+ }
+ else System.err.println("Usage: summation <integer value>");
+ }
+}