Bully Algorithm simulation fully encapsulated

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
class BullyAlgorithm
{
    boolean process[];
    int coordinator,n;
    BufferedReader br=new BufferedReader(new InputStreamReader(System.in));
    void ip()
    {
        System.out.print("Enter number of Processes ");
        try
        {
            n=Integer.parseInt(br.readLine());
            process=new boolean[n];
            for(int i=0;i<n;i++)
                process[i]=true;
        }
        catch(IOException ie)
        {
            System.out.println("Error");
        }
        coordinator=n;
    }
    void election()
    {
        int comm=0,max=0;
        try
        {
            comm=Integer.parseInt(br.readLine());
            if(!process[comm-1])
                System.out.println("Dead Process");
            else
            {
                for(int i=comm;i<=n;i++)
                System.out.println("Request Message to Process "+i);
                for(int i=comm;i<=n;i++)
                {
                    if(process[i-1])
                    {
`                           if(max<i)
                        max=i;
                        System.out.println("Reply Message to Process "+i);
                    }
                }
                System.out.println("The Co-ordinator is "+max);
                coordinator=max;
            }
        }
        catch(IOException ie)
        {
            System.out.println("Error");
        }
    }
    void menu()
    {
        int choice=0,id=0;
        do
        {
            System.out.println("Enter");
            System.out.println("1. Crash");
            System.out.println("2. Recover");
            System.out.println("3. Check Coordinator");
            System.out.println("4. Increase Number of Processes");
            System.out.println("0. Exit");
            try
            {
                choice=Integer.parseInt(br.readLine());
            }
            catch(IOException ie)
            {
                System.out.println("Error");
            }
            switch(choice)
            {
                case 1:
                {
                    try
                    {
                        id=Integer.parseInt(br.readLine());
                    }
                    catch(IOException ie)
                    {
                        System.out.println("Error");
                    }
                    if(process[id-1])
                    {
                        process[id-1]=false;
                        System.out.println("Process Crashed ");
                        if(id==coordinator)
                            election();
                    }
                    else
                    {
                        System.out.println("Process Already Dead");
                    }
                    break;
                }
                case 2:
                {
                    try
                    {
                        id=Integer.parseInt(br.readLine());
                    }
                    catch(IOException ie)
                    {
                        System.out.println("Error");
                    }
                    if(!process[id-1])
                    {
                        process[id-1]=true;
                        System.out.println("Process Recovered ");
                        if(id>coordinator)
                        {
                            System.out.println("Process "+id+" Bullies Process "+ coordinator);
                            coordinator=id;
                        }
                    }
                    else
                    {
                        System.out.println("Process Already Alive");
                    }
                    break;
                }
                case 3:
                {
                    System.out.println("The Co-ordinator is "+coordinator);
                    break;
                }
                case 4:
                {
                    ip();
                    break;
                }
                case 0:
                {
                    break;
                }
                default:
                {
                    System.out.println("Invalid Choice");
                    break;
                }
            }
        }while(choice!=0);
    }
    public static void main(String args[])
    {
        BullyAlgorithm b=new BullyAlgorithm();
        b.ip();
        b.menu();
    }
}