TO IMPLEMENT ROUND ROBIN TIME SLICING IN JAVA

/*
TO IMPLEMENT ROUND ROBIN TIME SLICING IN JAVA
*/

import java.util.*;
public class RR
{
public static void main(String arg[])throws Exception
{
Scanner s=new Scanner(System.in);
int n,quan,tat;
System.out.println("Enter no of processes:");
n=s.nextInt();
System.out.println("enter time quantum:");
quan=s.nextInt();
Process p[]=new Process[n];
for(int i=0;i<n;i++)
{
p[i]=new Process();
}
for(int i=0;i<n;i++)
{
System.out.println("PROCESS ID:");
p[i].id=s.nextInt();
System.out.println("ARRIVAL TIME:");
p[i].atime=s.nextInt();
System.out.println("Burst time:");
p[i].btime=s.nextInt();
}
for(int i=0;i<n-1;i++)
{
for(int j=0;j<n-1;j++)
{
if(p[j].atime>p[j+1].atime)
{
Process t=p[j];
p[j]=p[j+1];
p[j+1]=t;
}
}
}
System.out.println("Process id\tArrival time\tBurst time");
System.out.println("...................................");
tat=0;
boolean flag=true;
int pass=0;
while(pass!=2)
{
for(int i=0;i<n;i++)
{
if(flag==true)
{
p[i].rbt=p[i].btime;
p[i].rbt=p[i].rbt-quan;
}
else
{
p[i].rbt=p[i].rbt-quan;
}
if(p[i].rbt>-4)
{
if(p[i].rbt<0)
p[i].rbt=0;
System.out.println(""+p[i].id+"\t\t"+p[i].atime+"\t\t"+p[i].btime+"\t\t"+p[i].rbt);
}
}
flag=false;
pass++;
}
}
}
class Process
{
int id,btime,atime,rbt;
Process()
{
id=0;
atime=0;
btime=0;
rbt=0;
}
}

/* OUTPUT
Enter no of processes:
2
enter time quantum:
12
PROCESS ID:
32
ARRIVAL TIME:
21
Burst time:
125
PROCESS ID:
45
ARRIVAL TIME:
12
Burst time:
12
Process id      Arrival time    Burst time
...................................
45              12              12              0
32              21              125             113
32              21              125             101
*/