public class ProductThread {
static class ProductThreads extends Thread{
private int begin, end;
int[] v1, v2;
long ris;
public ProductThreads(String name, int [] v1, int [] v2, intbegin, int end) {
setName(name);
this.v1 = v1;
this.v2 = v2;
this.begin = begin;
this.end = end;
this.ris = 0;
}
public void run() {
System.out.println(\"Thread \" +Thread.currentThread().getName() + \"[\" + begin + \",\" + end+ \"] started\");
ris = 1;
for(int i = begin; i <= end; i++)
ris *= v1[i] * v2[i];
System.out.println(\"Thread \" +Thread.currentThread().getName() + \"[\" + begin + \",\" + end+ \"] completed\");
}//run
public long getResult() {
return ris;
}
}//ProductThread
public static void main(String[] args) throwsInterruptedException {
int [] a = {1,2,3,4,5,6,7,8,9,10};
int [] b = {1,2,3,4,5,6,7,8,9,19};
System.out.print(\"A = \" );
print(a);
System.out.print(\"B = \" );
print(b);
System.out.println();
//create threads
ProductThreads t0 = new ProductThreads(\"T0\", a, b, 0, 2);
ProductThreads t1 = new ProductThreads(\"T1\", a, b, 3, 5);
ProductThreads t2 = new ProductThreads(\"T1\", a, b, 6, 9);
//start threads
t0.start();
t1.start();
t2.start();
//wait for completion of threads
t0.join();
t1.join();
t2.join();
//computation of final result
long result = 1;
System.out.println(\"T0 result= \" +t0.getResult());
System.out.println(\"T1 result= \" +t1.getResult());
System.out.println(\"T2 result= \" +t2.getResult());
result *= t0.getResult() * t1.getResult() * t2.getResult();
System.out.println();
//final statement to be printed
System.out.println(\"Final Results = \"+ t0.getResult() + \" * \" + t1.getResult() + \" * \" + t2.getResult()+ \"= \" + result);
}
static void print(int[] v) {
System.out.print(\"[\");
for (int i = 0; i < v.length; i++) {
System.out.print(v[i] + \" \");
System.out.println(\"]\");
}
}
}
Using the same type of multithreading, I need to create a simpleprogram that generates the factorial of a number, but splits up thecalculation in multiple threads.
For instance, 5! = 5 * 4 * 3 * 2 * 1 so the threads would splitthe calculation up. Ex: T1 = 5 * 4 * 3 + T2 = 2 * 1
