Pls find out the error in it....

Discussion in 'Java' started by suvajit3456, Nov 15, 2010.

  1. suvajit3456

    suvajit3456 New Member

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    Hello, I am trying to find out the error in this program...
    Code:
    import java.io.*;
    public class reservation
    {
    InputStreamReader isr=new InputStreamReader (System.in);
    BufferedReader br=new BufferedReader (isr);
    //System.out.print("Please enter a word");
    int pno[]=new int[275];
    String name[]=new String[275];
    String phno[]=new String[275];
    int age[]=new int[275];
    int cl[]=new int[275];
    int pcount=0;
    int pnum=1;
    int max1=75;
    int max2=125;
    int max3=175;
    public void doMenu() throws Exception
    {
    int cho=0;
    do
    {
    System.out.println("\f");
    doHeading();
    System.out.println("1.Book ticket");
    System.out.println("2.Cancel ticket");
    System.out.println("3.Search passenger");
    System.out.println("4.Reservation chart");
    System.out.println("5.Display unbooked tickets");
    System.out.println("6.Exit");
    System.out.println("Please enter your choice");
    cho=Integer.parseInt(br.readLine());
    switch(cho)
    {
    case 1:doBook();
    break;
    case 2:doCancel();
    break;
    case 3:doSearch();
    break;
    case 4:doDispList();
    break;
    case 5:doDispUnbooked();
    break;
    case 6:doExit();
    break;
    default :System.out.println("Invalid choice");
    }
    char e = (char)br.read();
    }while(cho!=6);
    }
    private void doHeading()throws Exception
    {
    System.out.println("#########################################################");
    System.out.println("*********Online Railway Reservation System***********");
    System.out.println("#########################################################");
    }
    private void doBook()throws Exception
    {
    System.out.println("Please enter the class of ticket");
    System.out.println("1. AC\t 2. First\t 3. Sleeper\t");
    int c=Integer.parseInt(br.readLine());
    System.out.println("Please enter no. of tickets");
    int t=Integer.parseInt(br.readLine());
    int ticketAvailable=0;
    if(c==1 && max1>=t)
    {
    ticketAvailable=1;
    }
    if(c==2 && max2>=t)
    {
    ticketAvailable=1;
    }
    if(c==3 && max3>=t)
    {
    ticketAvailable=1;
    }
    if(ticketAvailable==1)
    {
    for(int i=0;i<t;i++)
    {
    pno[pcount]=pnum;
    System.out.println("Please enter your name");
    name[pcount]=br.readLine();
    System.out.println("Please enter your age");
    age[pcount]=Integer.parseInt(br.readLine());
    cl[pcount]=c;
    System.out.println("Please enter your phno");
    phno[pcount]=br.readLine();
    pcount++;
    pnum++;
    System.out.println("Ticket successfully booked");
    }//for
    if(c==1)
    {
    max1-=t;
    System.out.println("Please pay Rs."+t*1500);
    }
    if(c==2)
    {
    max2-=t;
    System.out.println("Please pay Rs."+t*1200);
    }
    if(c==3)
    {
    max3-=t;
    System.out.println("Please pay Rs."+t*1000);
    }
    }
    }
    private void doCancel()throws Exception
    {
    int t_pno[]=new int[275];
    String t_name[]=new String[275];
    String t_phno[]=new String[275];
    int t_age[]=new int[275];
    int t_cl[]=new int[275];
    int t_pcount=0;
    int passengerFound=0;
    System.out.println("Please enter your passenger no.");
    int p=Integer.parseInt(br.readLine());
    for(int i=0;i<pcount;i++)
    {
    if(pno[i]!=p)
    {//transfer
    t_pno[t_pcount]=pno[i];
    t_name[t_pcount]=name[i];
    t_phno[t_pcount]=phno[i];
    t_age[t_pcount]=age[i];
    t_cl[t_pcount]=cl[i];
    t_pcount++;
    }
    else
    {
    passengerFound=1;
    if(cl[i]==1)
    {
    max1++;
    System.out.println("Please collect refund of Rs."+1800);
    }
    if(cl[i]==2)
    {
    max2++;
    System.out.println("Please collect refund of Rs."+1500);
    }
    if(cl[i]==3)
    {
    max3++;
    System.out.println("Please collect refund of Rs."+1000);
    }//else
    }//if
    }
    if(passengerFound==1)
    {
    pno=t_pno;
    name=t_name;
    age=t_age;
    cl=t_cl;
    phno=t_phno;
    pcount=t_pcount;
    System.out.println("ticket successfully cancelled");
    }
    }//method
    private void doDispList()throws Exception
    {
    System.out.println("Passenger list in AC class");
    System.out.println("pno \t name \t\t age \t phno");
    for(int i=0;i<pcount;i++)
    {
    if(cl[i]==1)
    {
    System.out.println(pno[i]+"\t"+name[i]+"\t\t"+age[i]+"\t"+phno[i]);
    }
    }
    System.out.println("Passenger list in First class");
    System.out.println("pno \t name \t\t age \t phno");
    for(int i=0;i<pcount;i++)
    {
    if(cl[i]==2)
    {
    System.out.println(pno[i]+"\t"+name[i]+"\t\t"+age[i]+"\t"+phno[i]);
    }
    }
    System.out.println("Passenger list in Sleeper class");
    System.out.println("pno \t name \t\t age \t phno");
    for(int i=0;i<pcount;i++)
    {
    if(cl[i]==3)
    {
    System.out.println(pno[i]+"\t"+name[i]+"\t\t"+age[i]+"\t"+phno[i]);
    }
    }
    }
    private void doSearch()throws Exception
    {
    int passengerFound=0;
    System.out.println("Please enter passenger no. to search");
    int p=Integer.parseInt(br.readLine());
    for(int i=0;i<pcount;i++)
    {
    if(pno[i]==p)
    {
    System.out.println("Detail found");
    passengerFound=1;
    System.out.println("passenger no.="+pno[i]); 
    System.out.println("name="+name[i]);
    System.out.println("class="+cl[i]); 
    System.out.println("phno="+phno[i]);
    System.out.println("age="+age[i]);
    }
    }//for
    if(passengerFound==0)
    System.out.println("No such passenger");
    }//method
    private void doDispUnbooked()throws Exception
    {
    System.out.println("No. of booked tickets status");
    System.out.println("AC class"+max1);
    System.out.println("First class"+max2);
    System.out.println("Sleeper class"+max3);
    }
    private void doExit()
    {
    System.out.println("&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&");
    System.out.println("Thank You for Using");
    System.out.println("&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&");
    }
    }
    I know that, this program has no main function although it is possible to compile with no error. Then it shows this following output:

    java.lang.NoSuchMethodError: main
    Exception in thread "main"
    Process completed.

    But, when I add a main function in it, after compiling, it shows more than 70 errors. Now I am unable to make it error free, please help me... :confused::(:cryin::embarasse
     
    suvajit3456, Nov 15, 2010
    SHARE #1
  2. virxen

    virxen Active Member

    Joined:
    Nov 24, 2009
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    your code with main method

    Code:
    import java.io.*;
    public class reservation{
        
    InputStreamReader isr=new InputStreamReader (System.in);
    BufferedReader br=new BufferedReader (isr);
    //System.out.print("Please enter a word");
    int pno[]=new int[275];
    String name[]=new String[275];
    String phno[]=new String[275];
    int age[]=new int[275];
    int cl[]=new int[275];
    int pcount=0;
    int pnum=1;
    int max1=75;
    int max2=125;
    int max3=175;
    
    public reservation() throws java.lang.Exception {
        doMenu();
    }
    public void doMenu() throws Exception{
        int cho=0;
        do{
            System.out.println("\f");
            doHeading();
        System.out.println("1.Book ticket");
        System.out.println("2.Cancel ticket");
        System.out.println("3.Search passenger");
        System.out.println("4.Reservation chart");
        System.out.println("5.Display unbooked tickets");
        System.out.println("6.Exit");
        System.out.println("Please enter your choice");
        cho=Integer.parseInt(br.readLine());
        switch(cho){
        case 1:doBook();
                break;
    case 2:doCancel();
    break;
    case 3:doSearch();
    break;
    case 4:doDispList();
    break;
    case 5:doDispUnbooked();
    break;
    case 6:doExit();
    break;
    default :System.out.println("Invalid choice");
    }
    char e = (char)br.read();
    }while(cho!=6);
    }
    private void doHeading()throws Exception{
        System.out.println("#########################################################");
        System.out.println("*********Online Railway Reservation System***********");
        System.out.println("#########################################################");
    }
    private void doBook()throws Exception{
        System.out.println("Please enter the class of ticket");
        System.out.println("1. AC\t 2. First\t 3. Sleeper\t");
        int c=Integer.parseInt(br.readLine());
        System.out.println("Please enter no. of tickets");
        int t=Integer.parseInt(br.readLine());
        int ticketAvailable=0;
        if(c==1 && max1>=t){
            ticketAvailable=1;
        }
        if(c==2 && max2>=t){
               ticketAvailable=1;
        }
        if(c==3 && max3>=t){
            ticketAvailable=1;
        }
        if(ticketAvailable==1){
            for(int i=0;i<t;i++){
                pno[pcount]=pnum;
                System.out.println("Please enter your name");
                name[pcount]=br.readLine();
                System.out.println("Please enter your age");
                age[pcount]=Integer.parseInt(br.readLine());
                cl[pcount]=c;
                System.out.println("Please enter your phno");
                phno[pcount]=br.readLine();
                pcount++;
                pnum++;
                System.out.println("Ticket successfully booked");
            }//for
            if(c==1){
                max1-=t;
                System.out.println("Please pay Rs."+t*1500);
            }
            if(c==2){
                max2-=t;
                System.out.println("Please pay Rs."+t*1200);
            }
            if(c==3){
                max3-=t;
                System.out.println("Please pay Rs."+t*1000);
            }
        }
    }
    private void doCancel()throws Exception{
        int t_pno[]=new int[275];
        String t_name[]=new String[275];
        String t_phno[]=new String[275];
        int t_age[]=new int[275];
        int t_cl[]=new int[275];
        int t_pcount=0;
        int passengerFound=0;
        System.out.println("Please enter your passenger no.");
        int p=Integer.parseInt(br.readLine());
        for(int i=0;i<pcount;i++){
                if(pno[i]!=p){//transfer
                t_pno[t_pcount]=pno[i];
                t_name[t_pcount]=name[i];
                t_phno[t_pcount]=phno[i];
                t_age[t_pcount]=age[i];
                t_cl[t_pcount]=cl[i];
                t_pcount++;
            } else{
                    passengerFound=1;
                    if(cl[i]==1){
                        max1++;
                        System.out.println("Please collect refund of Rs."+1800);
                    }
                    if(cl[i]==2){
                        max2++;
                        System.out.println("Please collect refund of Rs."+1500);
                    }
                    if(cl[i]==3){
                        max3++;
                        System.out.println("Please collect refund of Rs."+1000);
                    }//else
                } //if
        }
        if(passengerFound==1){
            pno=t_pno;
            name=t_name;
            age=t_age;
            cl=t_cl;
            phno=t_phno;
            pcount=t_pcount;
            System.out.println("ticket successfully cancelled");
        }
    }//method
    
    private void doDispList()throws Exception{
        System.out.println("Passenger list in AC class");
        System.out.println("pno \t name \t\t age \t phno");
        for(int i=0;i<pcount;i++){
            if(cl[i]==1){
                System.out.println(pno[i]+"\t"+name[i]+"\t\t"+age[i]+"\t"+phno[i]);
            }
        }
        System.out.println("Passenger list in First class");
        System.out.println("pno \t name \t\t age \t phno");
        for(int i=0;i<pcount;i++){
            if(cl[i]==2){
                System.out.println(pno[i]+"\t"+name[i]+"\t\t"+age[i]+"\t"+phno[i]);
            }
        }
        System.out.println("Passenger list in Sleeper class");
        System.out.println("pno \t name \t\t age \t phno");
        for(int i=0;i<pcount;i++){
            if(cl[i]==3){
                System.out.println(pno[i]+"\t"+name[i]+"\t\t"+age[i]+"\t"+phno[i]);
            }
        }
    }
    private void doSearch()throws Exception{
        int passengerFound=0;
        System.out.println("Please enter passenger no. to search");
        int p=Integer.parseInt(br.readLine());
        for(int i=0;i<pcount;i++){
            if(pno[i]==p){
                System.out.println("Detail found");
                passengerFound=1;
                System.out.println("passenger no.="+pno[i]); 
                System.out.println("name="+name[i]);
                System.out.println("class="+cl[i]); 
                System.out.println("phno="+phno[i]);
                System.out.println("age="+age[i]);
            }
        }//for
        if(passengerFound==0)
            System.out.println("No such passenger");
    }//method
    private void doDispUnbooked()throws Exception{
        System.out.println("No. of booked tickets status");
        System.out.println("AC class"+max1);
        System.out.println("First class"+max2);
        System.out.println("Sleeper class"+max3);
    }
    private void doExit()    {
        System.out.println("&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&");
        System.out.println("Thank You for Using");
        System.out.println("&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&&");
    }
    public static void main(String []args) throws java.lang.Exception{
        new reservation();
    }
    }
     
    virxen, Nov 15, 2010
    SHARE #2

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