_faq-why-does-my-code-throw-a-null-pointer-exception-common-reason-1-redeclaration-long-version.jpg "FAQ - why does my code throw a null pointer exception - common reason #1 Redeclaration (Long Version) from code refactoring means Video Screenshot Preview")
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⏲ Duration: 3 min 92 sec
✓ Published: 30-Aug-2017
✓ Published: 30-Aug-2017
Description:
A common reason for Null Pointer Exceptions in Java is a variable redeclaration instead of instantiation. Learn what that means, how to avoid it, and how to spot it, in this presentation.nn# FAQ - why does my code throw a null pointer exception - common reason #1 Redeclarationnn- Using `@BeforeClass` or `@Before` can setup data for use in testsn- Any 'variables' we instantiate need to be 'fields' rather than variablesn- We want to instantiate them in the setup method rather than redeclare themnn
A common reason for Null Pointer Exceptions in Java is a variable redeclaration instead of instantiation. Learn what that means, how to avoid it, and how to spot it, in this presentation.nn# FAQ - why does my code throw a null pointer exception - common reason #1 Redeclarationnn- Using `@BeforeClass` or `@Before` can setup data for use in testsn- Any 'variables' we instantiate need to be 'fields' rather than variablesn- We want to instantiate them in the setup method rather than redeclare themnn
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