java null string

/**
 * @author lautturi.com 
 * Java example: java string null
 */


public class Lautturi {

	public static void main(String[] args) {

		String str1 = null; 
		String str2;
		
		System.out.println(str1);
		System.out.println(str2);

	}
}

output:

Exception in thread "main" java.lang.Error: Unresolved compilation problem: 
	The local variable str2 may not have been initialized

solution:

String str2 = null;
OR
String str2 = "any string";