query: Java NullPointerException when reading SerialPort Names
positive_passages.docid: 49
positive_passages.text: What is a NullPointerException, and how do I fix it?
negative_passages.docid: 41657
negative_passages.text: How to send data to a serial port and see any answer?
negative_passages.docid: 101436
negative_passages.text: How can I identify an anonymous inner class in a NotSerializableException
negative_passages.docid: 70532
negative_passages.text: NullReferenceException after POST
negative_passages.docid: 12226
negative_passages.text: Compilation error "Cannot find symbol" on DriverManager.getConnection()
negative_passages.docid: 74201
negative_passages.text: getResourceAsStream() is always returning null
negative_passages.docid: 119453
negative_passages.text: How to Read and Write from the Serial Port
negative_passages.docid: 89487
negative_passages.text: Is it safe to get values from a java.util.HashMap from multiple threads (no modification)?
negative_passages.docid: 69771
negative_passages.text: NullPointerException when setting attribute?
negative_passages.docid: 63306
negative_passages.text: EOFexception in Java when reading objectinputstream
negative_passages.docid: 79845
negative_passages.text: Why does ObjectOutputStream.writeObject not take a Serializable?
negative_passages.docid: 10581
negative_passages.text: Avoiding NullPointerException in Java
negative_passages.docid: 79586
negative_passages.text: System.NullPointerException: Attempt to de-reference a null object
negative_passages.docid: 134040
negative_passages.text: Serializing a Nullable in to XML
negative_passages.docid: 144658
negative_passages.text: System.NullPointerException: Attempt to de-reference a null object ,sravn
negative_passages.docid: 46944
negative_passages.text: Null pointer Exception - findViewById()
negative_passages.docid: 39598
negative_passages.text: Appending to an ObjectOutputStream