How to handle NullPointerException in Java [closed]

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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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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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try {
    // something stupid
} catch(NullPointerException e) {
    // probably don't bother doing clean up
} finally {
    // carry on as if nothing went wrong
}

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You should really make yourself familiar with the concept of a variable being null. Checkout the API: http://java.sun.com/javase/6/docs/api/java/lang/NullPointerException.html

Generally, try to do more research in advance.