Exception in thread "main" java.lang.NullPointerException - Package
java, nullpointerexception, package
Solution
`System.console` can return `null` depending on the environment in which the JVM is operating.
From the javadoc
If no console device is available then an invocation of that method will return null.
Eclipse is one of these environments where the `System.console` returns `null` since it typically uses `javaw` which doesnt have an associated console window.
Use java.util.Scanner instead which has no such limitation.
Scanner scanner = new Scanner(System.in);
String planet = scanner.nextLine();
Problem
I'm going through the OCA Java SE 7 study guide and am going through packages. However, I'm inputting the same code in Eclipse, found in the book but I'm getting this error. The error is Exception in thread "main" java.lang.NullPointerException at com.ocaj.exam.tutorial.MainClass.main(MainClass.java:12) Here is my code... ``` package com.ocaj.exam.tutorial; //Package statement //Imports class ArrayList from the java.util package import java.util.ArrayList; //Imports all classes from the java.io package import java.io.*; public class MainClass { public static void main(String[] args) { //Creates console from java.io package Console console = System.console(); String planet = console.readLine("\nEnter your favourite planet: "); //Creates list for planets ArrayList planetList = new ArrayList(); planetList.add(planet); //Adds users input into the list planetList.add("Gliese 581 c"); //Adds a string to the list System.out.println("\nTwo cool planets: " + planetList); } } ``` Many thanks