This is a Java JDBC application that connects to a MySQL/PostgreSQL database to perform CRUD operations on an Employee table. static final String DB_URL = "jdbc:mysql ...

SEVERE [org.openide.util.RequestProcessor]: Error in RequestProcessor org.netbeans.modules.progress.ui.RunOffEDTImpl$1 java.lang.NullPointerException: Cannot invoke ...

OpenJDK JEP 522，G1 GC：通过减少同步来提高吞吐量（G1 GC: Improve Throughput by Reducing Synchronization），已从其JEP Draft ...