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How to handle NullPointerException in Java? Please provide details so I can get rid of this problem
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Answer: Some of the best practices to avoid NullPointerException are: Use equals() and equalsIgnoreCase() method with String literal instead of using it on the unknown object that can be null. Use valueOf() instead of toString() ; and both return the same result. Use Java annotation @NotNull and @Nullable.
Programmers typically catch NullPointerException under three circumstances: The program contains a null pointer dereference. Catching the resulting exception was easier than fixing the underlying problem. The program explicitly throws a NullPointerException to signal an error condition.
You should avoid NullPointerExceptions:
if(someObject != null) {
someObject.doSomething();
} else {
// do something other
}
Normally you should ensure that the objects which you use are not null.
You also can catch the NullPointerException and except using an if-condition.
try {
someObject.doSomething();
} catch(NullPointerException e) {
// do something other
}
Normally there is a bug in your code, when a NullPointerException occurs.
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