When computing facets, it is possible that the following exception gets thrown: java.lang.NullPointerException: Cannot invoke "com.google.refine.model.Column.getPrecompute(String)" because "column" ...

In some languages (e.g., Ada and Java), the null value is used as the default initialization for pointers, and attempting to dereference a null pointer raises a run-time exception.

Learn everything you need to throw, try, catch, and clean up after Java exceptions in your programs.

Greetings, Trying out SpreadsheetView and the only way it works for me if I call the no argument constructor. SpreadsheetView spreadsheetView = new SpreadsheetView(); When I try something like belo ...

Some exceptions in Java must be handled in the developer's code. Other exceptions can occur without any exception handling semantics at all. When an exception must be handled with try-and-catch ...

Null pointer exception is an “exception” (error) that is particularly common when programming in Java. For a beginner, this is a confusing and daunting message to receive, but it can be just ...

Null pointer exceptions are common software faults, but they are dangerous and can cause a program to crash if they occur. In addition, it is hard to find them by simply running test cases. When a ...