query: Exception in thread "main" java.lang.NullPointerException with gui
positive_passages.docid: 49
positive_passages.text: What is a NullPointerException, and how do I fix it?
negative_passages.docid: 46944
negative_passages.text: Null pointer Exception - findViewById()
negative_passages.docid: 17140
negative_passages.text: Preventing GUI From Freezing When Calling SwingWorker.get( )
negative_passages.docid: 2116
negative_passages.text: IllegalArgumentException or NullPointerException for a null parameter?
negative_passages.docid: 11494
negative_passages.text: Swing, Java and multithreading, and coloring buttons
negative_passages.docid: 9605
negative_passages.text: Java - Could not find the main class
negative_passages.docid: 80631
negative_passages.text: NullPointerException but compiling?
negative_passages.docid: 121948
negative_passages.text: Java GUI repaint() problem?
negative_passages.docid: 143068
negative_passages.text: GUI not starting in Ubuntu 17.10
negative_passages.docid: 60078
negative_passages.text: Exception in thread "main" java.lang.StringIndexOutOfBoundsException: String index out of range: 11
negative_passages.docid: 131560
negative_passages.text: Running a java program at the command line, what am I doing wrong?
negative_passages.docid: 87658
negative_passages.text: Java: GUI - JButton opening new JPanel and reading the JTextFields
negative_passages.docid: 54390
negative_passages.text: "does not contain a static 'main' method suitable for an entry point"
negative_passages.docid: 101942
negative_passages.text: Java program does not run and throws an error about classes
negative_passages.docid: 101449
negative_passages.text: Using methods from another class in the main?
negative_passages.docid: 129085
negative_passages.text: What is "String args[]"? parameter in main method Java
negative_passages.docid: 64200
negative_passages.text: Can Java's NullPointerException be changed to report on which variable was null?