Description Markus Keller 2007-03-20 09:43:59 EDT

I20070320-0010

Currently, there are no quick fixes for null-related problems (null pointer access, potential NPE, redundant null checks.

For (potential) NPE problems, the fix would be to add a null check.
For redundant null checks, the fix would be to replace the check with true or false.

Here's a testbed that produces all null-related problems we currently have:

class Nullerei {
	void nullAccess(Object a, Object b) {
		a= null;
		a.hashCode();
	}
	void potential(Object a, Object b) {
		if (a != null) { }
		a.hashCode();
		
		if (b == null) { }
		b.hashCode();
	}
	void redundantCheck(Object a, Object b) {
		a.hashCode();
		if (a == null) { }
		a= null;
		if (a != null) { }
		a= null;
		if (a instanceof Integer) {}
		
		b= new Object();
		if (b != null) { }
		b= null;
		b= null;
		if (b == null) { }
	}
}