RNU.THIS

An RNU.THIS error indicates comparing 'this' with null, but this cannot be null.

Mitigation and prevention

Remove redundant check.

Example 1

12     public void doSomethingStrange() {
13         if (this == null) {
14             System.err.println("this == null!");
15         }
16     }

RNU.THIS will be reported at line 13.

Related checkers

• JD.RC.EXPR.CHECK
• JD.RC.EXPR.DEAD

External guidance

• CWE-476: NULL Pointer Dereference

Security training

Application security training materials provided by Secure Code Warrior.

• Null Dereference Training Video - Test your skills with a training example