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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
     
  2. virxen

    virxen New Member

    Joined:
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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();
        }
        }
    
     

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