Java Help.

maximus_power

Can someone please help me with this simple piece of Java?

import java.util.Scanner;
class Books
{
public static void main (String args[]) throws Exception
{
Scanner in = new Scanner(System.in);
//These are my variables.
int updateStock;
int code;
int category;
//These are my arrays
int [] stockCounter = new int [4];
String[] bookCategory = {"Novel", "Historical Reference", "Non-Fiction", "Educational",};
int [] userCode = {100, 200, 350, 400,};

//Loop to count through the array.
for (int i = 0; i < 4; i ++){; //This is the loop counter.
System.out.println("Please enter your stock code " + userCode);
//System.out.println("Stock for " + userCode "is " + updateStock);
if (userCode == code [0]){
System.out.println("How many do you want");
updateStock[0] = in.nextint;
}
else
userCode = code[1];
System.out.println("How many do you want");
updateStock[1] = in.nextInt;
if (userCode = code[2]){
System.out.println("How many do you want");
updateStock[2] = in.nextInt;}
else
userCode = code[3];
System.out.println("How many do you want");
updateStock[3] = in.nextInt;}
if (userCode = code[4]){
System.out.println("How many do you want");
updateStock[4] = in.nextInt;}


}
}

lynchie

Where to start...

For statement syntactically incorrect.
Referencing ints as arrays.
Function calls are not correct.

You need to fix the basic language errors first.

maximus_power

Its pretty rough at the moment but I cant figure out how to resolve the array issue.

Giblet

= is an assignment
== is equality

So testing x = y is actually assigning y to x, not comparing.

also, you have your arrays backwards

code is an int, not an array.
userCode is an array.

so you need to do

userCode[0] == code

Arrays are 0 indexed, so an array with 4 items contains items at
[0] [1] [2] and [3] only.

maximus_power

Thank you Giblet.