CODEWITHSUNDEEP
javanullpointerexception
wind_gan
wind_gan

Reputation: 132

NullPointerException after checking with if statement

I have the following code:

        Map<BigInteger, AttributeValue> values = getParameters(elementHandler);

        AttributeValue value = values.get(attrID);
        AttributeValue auxValue = null;
        if (auxAttrID != null)
            auxValue = values.get(auxAttrID);

        try {
            if (value == null) {
                // some code here
            }
            if (value != null) {
                assert (value != null) : "value is null";
                if (value.getValue() == null ) {
                    // some code here
                } else if (auxAttrID != null && auxValue != null) {
                    // some code here
                }
            }
        } catch (Exception e) {
            log.error("Error at getting attribute value (attr#" + attrID + ", auxAttrId#" + auxAttrID + ")", e);
        }
        return value;
    }

It produces NullPointerException at line

if (value.getValue() == null )

right after assertion.

AttributeValue is a simple POJO class. Why this happens and how can I fix it?

Upvotes: 2

Views: 113

Answers (1)

mazhar islam
mazhar islam

Reputation: 5619

It produces NullPointerException at line if (value.getValue() == null )

if (value != null) {
    //...
    if (value.getValue() == null ) {
        //....

The above if condition states that, value is not NULL when you are invoking value.getValue(). Still you are getting NullPointerException for value.getValue() means the exception is coming from method getValue() (e.g you are trying to access any class attributes with a NULL object etc).

Edit your question with the implementation of getValue().

Use getStackTrace() to find out where the problem occurs. Read this for more information.

Upvotes: 1

Related Questions