Leet-Falcon questions

Leet-Falcon answers

• What are the pros and cons of using broadcast variables in a singleton?
• Clicking on disabled Swing components
• save Spark dataframe to Hive: table not readable because "parquet not a SequenceFile"
• Unsupported Java Version: Cannot start under Java 1.7: Java 1.8 or later is required
• How to convert DataFrame to Dataset in Apache Spark in Java?
• How to make a windows 7 loading bar on the taskbar