NegativeArray

[whitedragon551]

On my last assignment and it has me stumped again.

Goal of this project is to ask the user for an input. Can be a string or integer. Said input is supposed to declare the size of the array. If the input is a positive integer it successfully creates said array and gives a message. If its a String/Letter entered I have to parse it to get a NumberFormatException error and handle it appropriately. If its a negative number I also have to use a NegativeArraySizeException and handle that appropriately with a catch block as well.

My code is as follows:

//NegativeArray.java by Tyler 10/27/2012

import java.util.*;

public class NegativeArray
{
   public  static void main(String[] args)
   {
  
	int numItems = 0;
	int[] items;
	String inputItems;
	
	Date today = new Date();
	System.out.println("NegativeArray.java" + "\nby Tyler " + today);
	
	//Create array if rules are met
	try
	{
		//Enter number of items to have in array
		inputItems = System.out.println("Enter number of items to hold in the array: ");
		numItems = Integer.parseInt(inputItems);
		
		//Create array to hold number of names to enter
		items = new int[numItems];
		System.out.println("Array created successfully");
	}
	//Catch if you enter a negative array size
	catch(NegativeArraySizeException exception)
	{	
		System.out.println("You can not enter a negative size for an array");
	}
	//Catch if you use a non numeric array size
	catch(NumberFormatException exception)
	{	
		System.out.println("You must use a number greater than or equal to 0");
	}
	//Displays what you tried to enter
	System.out.println("The size of the array you tried to create was: " + numItems);
	}
}

The error Im getting is:

C:\Users\Tyler\Documents\School Work\CIS280\Project 7>javac NegativeArray.java
NegativeArray.java:21: incompatible types
found : void
required: java.lang.String
inputItems = System.out.println("Enter number of items to hold i
n the array: ");
^
1 error

Not sure why. Im clearly setting inputItems equal to the number/string entered by the user.

[kuriozal]

Because of

inputItems = System.out.println("Enter number of items to hold in the array: ");

System.out.println returns void, it doesn't read anything from console.

Use

 Console console = System.console();
 inputItems = console.readLine("Enter number of items to hold in the array: ");

or something other to read input from console.