Javac error

[Sotsiak]

Hello, so this is my first post here. I am also a new programmer, learning java for some months now. Ok, let me go straight to the issue. I am writing a simple program for university and I stuck at a certain error from the compilation program (javac).

The program I wrote is this:

import java.io.*;

class vehicles{
 private String number;
 private char status;
 private int years;

 vehicles(String n, char s, int y){
  number=n;
  status=s;
  years=n;
 }

 static int [] fee_calculation(vehicles.table[]){
  int fees[]=new fees[table.length];
  for(int i=0; i<table.length; i++){
   if(status=='1')
    fees[i]=200;
   else if(status=='2')
    fees[i]=2000;
   else 
    fees[i]=1000;
  
  if(years<=5)
   fees[i]+=30;
  else if(years<=10)
   fees[i]+=60;
  else if(years<=15)
   fees[i]+=90;
  else 
   fees[i]+=120;
  }
  return fees;
 }

 String get_number(){
  return number;
 }
}

class vehicles_demo{
 public static void main(String args[]) throws IOException{
  BufferedReader br=new BufferedReader(new InputStreamReader(System.in));

  String n;
  char s;
  int y;

  System.out.println("How many vehicles you want to give for calculation: ");
  int how_many=Integer.parseInteger(br.readLine());
  System.out.println();

  vehicles table=new vehicles[how_many];

  for(int i=0; i<table.length; i++){
   System.out.println(i+" vehicle");
   System.out.println("Type the number of the vehicle: ");
   n=br.readLine();
   System.out.println("Type the status of the vehicle (1=legal, 2=illegal, 3=under investigation): ");
   s=(char) System.in.read();
   System.out.println("Type the years the vehicle is being used: ");
   y=Integer.parseInteger(br.readLine());

   table[i]=new vehicles(n, s, y);
  }

  int fees[]=new int[table.length];
  fees=vehicles.fee_calculation(table);
  
  for(int i=0; i<table.length; i++){
   System.out.println("The vehicle with the number "+table[i].get_number()+" has a fee of "+fees[i]+" euro");
   System.out.println();
  }
 }
}

The error I am getting from the command prompt is this:

vehicles_demo.java:14: <identifier> expected
static int [] fee_calculation(vehicles.table[]){
(the pointer shows the last parenthesis)

What the hell is going on, is it a syntax error, I can't find it. Any help appreciated.

[Norm]

In the method definition statement you need a type for its parameter.

[JosAH]

The error I am getting from the command prompt is this:

vehicles_demo.java:14: <identifier> expected
static int [] fee_calculation(vehicles.table[]){
(the pointer shows the last parenthesis)

What the hell is going on, is it a syntax error, I can't find it. Any help appreciated.

A formal parameter has a type and a name; your parameter is something else: 'vehicles.table[]'. Shouldn't that be:

static int[] fee_calculation(vehicles[] table) {

Also note the difference in Java's way of specifying an array and the C way of doing this.

kind regards,

Jos

[Sotsiak]

Oh, thank you very much. How stupid of me.

[gcalvin]

Since you're just starting out, let me make a couple of style points as well. A better name for your class is Vehicle -- class names should be singular nouns, and should be capitalized so that we can talk about creating a new Vehicle, or creating an array of Vehicles and know exactly what we mean. Similarly, method names should be active verbs, so calculateFees() is a better name than fee_calculation(). Underscores are legal in identifiers, but atypical (for no particular reason, C/C++ developers seem to like them more than Java developers do).

You may find this interesting:

Code Conventions for the Java(TM) Programming Language: Contents

-Gary-

[JosAH]

Underscores are legal in identifiers, but atypical (for no particular reason, C/C++ developers seem to like them more than Java developers do).

The original C and C++ community uses lowercase all over the place; they detest CamelCase names; glueing word together like that isanunreadablemess,
so they use_underscores_for_that while the Java community usesCamelCaseNames.

kind regards,

Jos