SPOS - Round Robin Program

import java.util.Scanner;

public class RoundRobin {

 public static boolean allZeros(int[][] processes) {

 for (int[] data: processes) {

 if (data[1] != 0) {

 return false;

 }

 }

 return true;

 }

 public static float calcAvg(int[] arr) {

 int sum = 0;

 for (int j : arr) {

 sum += j;

 }

 return (float) sum/arr.length;

 }

 public static void main(String[] args) {

 Scanner myScanner = new Scanner(System.in);

 System.out.print("Enter total number of processes: ");

 int totalNumProcesses = myScanner.nextInt();

 System.out.print("Enter the time quantum: ");

 int timeQuantum = myScanner.nextInt();

 int[][] processes = new int[totalNumProcesses][2];

 int[] burstTimes = new int[totalNumProcesses];

 int[] waitingTimes = new int[totalNumProcesses];

 int[] turnAroundTimes = new int[totalNumProcesses];

 for (int i = 0; i < totalNumProcesses; i++) {

 System.out.print("Enter Process id: ");

 processes[i][0] = myScanner.nextInt();

 System.out.print("Enter Burst Time: ");

 processes[i][1] = myScanner.nextInt();

 burstTimes[i] = processes[i][1];

 }

 boolean isDone;

 int idx = 0;

 while(true) {

 int wt = 0;

 if (processes[idx][1] < timeQuantum) {

 wt = processes[idx][1];

 processes[idx][1] = 0;

 } else {

 wt = timeQuantum;

 processes[idx][1] -= wt;

 }

 for (int i = 0; i < processes.length; i++) {

 if (i != idx && processes[i][1] != 0) {

 waitingTimes[i] += wt;

 }

 }

 isDone = allZeros(processes);

 if (isDone) {

 break;

 }

 idx++;

 idx %= totalNumProcesses;

 if (processes[idx][1] == 0) {

 while(processes[idx][1] != 0) {

 idx++;

 idx%=totalNumProcesses;

 }

 }

 }

 for (int i = 0; i < processes.length; i++) {

 turnAroundTimes[i] = waitingTimes[i] + burstTimes[i];

 }

 float avgWaitingTime = calcAvg(waitingTimes);

 float avgTurnAroundTime = calcAvg(turnAroundTimes);

 System.out.format("%4s%4s%4s%4s\n", "pid", "bt", "wt", "tat");

 for (int i = 0; i < totalNumProcesses; i++) {

 System.out.format("%4d%4d%4d%4d\n", processes[i][0], burstTimes[i], waitingTimes[i],

turnAroundTimes[i]);

 }

 System.out.println("The average waiting time is: " + avgWaitingTime);

 System.out.println("The average turnaround time is: " + avgTurnAroundTime);

 }

}