DicksOnParade.java

public class DicksOnParade {
	
	public static void main(String[] args) {
	
		Dong aDick = new Dong();
		String cockname = aDick.getName();
		System.out.println("Dick length: " + cockname.length());
	}
}

Dong.java

public class Dong {
	private String name;

	public void setName(String n) {
		this.name = n;
	}

	public String getName() {
		return this.name;
	}
}

gistfile3.txt

[0:538] callisto:~ $ javac Dong.java
[0:539] callisto:~ $ javac DicksOnParade.java
[0:540] callisto:~ $ java DicksOnParade
Exception in thread "main" java.lang.NullPointerException
	at DicksOnParade.main(DicksOnParade.java:7)
[0:541] callisto:~ $