MySql Verbindungsfehler (Java.lang.VerifyError) (IDE: Netbeans)

Question

Ich verbinde mein Projekt mit Wampserver. Das gleiche Projekt verbindet mit Datenbank in anderem System mit dem gleichen Code und Verfahren, aber wenn ich es auf meinem System versuche, zeigt es unter Fehlern msg:

run: 
java.sql.SQLException: java.lang.VerifyError: (class: com/mysql/jdbc/DatabaseMetaData, method: supportsRefCursors signature:()Z) Illegal use of nonvirtual function call 
java.sql.SQLException: java.lang.VerifyError: (class: com/mysql/jdbc/DatabaseMetaData, method: supportsRefCursors signature:()Z) Illegal use of nonvirtual function call 
at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:1074) 
at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:988) 
at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:974) 
at com.mysql.jdbc.SQLError.createSQLException(SQLError.java:919) 
at com.mysql.jdbc.Util.handleNewInstance(Util.java:435) 
at com.mysql.jdbc.ConnectionImpl.getInstance(ConnectionImpl.java:404) 
at com.mysql.jdbc.NonRegisteringDriver.connect(NonRegisteringDriver.java:317) 
at java.sql.DriverManager.getConnection(DriverManager.java:619) 
at java.sql.DriverManager.getConnection(DriverManager.java:244) 
at sea.DBClass.ConnectDB(DBClass.java:30) 
at sea.Interface.jButton1ActionPerformed(Interface.java:63) 
at sea.Interface.access$000(Interface.java:13) 
at sea.Interface$1.actionPerformed(Interface.java:38) 
at javax.swing.AbstractButton.fireActionPerformed(AbstractButton.java:2022) 
at javax.swing.AbstractButton$Handler.actionPerformed(AbstractButton.java:2346) 
at javax.swing.DefaultButtonModel.fireActionPerformed(DefaultButtonModel.java:402) 
at javax.swing.DefaultButtonModel.setPressed(DefaultButtonModel.java:259) 
at javax.swing.plaf.basic.BasicButtonListener.mouseReleased(BasicButtonListener.java:252) 
at java.awt.Component.processMouseEvent(Component.java:6513) 
at javax.swing.JComponent.processMouseEvent(JComponent.java:3322) 
at java.awt.Component.processEvent(Component.java:6278) 
at java.awt.Container.processEvent(Container.java:2229) 
at java.awt.Component.dispatchEventImpl(Component.java:4869) 
at java.awt.Container.dispatchEventImpl(Container.java:2287) 
at java.awt.Component.dispatchEvent(Component.java:4691) 
at java.awt.LightweightDispatcher.retargetMouseEvent(Container.java:4834) 
at java.awt.LightweightDispatcher.processMouseEvent(Container.java:4494) 
at java.awt.LightweightDispatcher.dispatchEvent(Container.java:4424) 
at java.awt.Container.dispatchEventImpl(Container.java:2273) 
at java.awt.Window.dispatchEventImpl(Window.java:2721) 
at java.awt.Component.dispatchEvent(Component.java:4691) 
at java.awt.EventQueue.dispatchEventImpl(EventQueue.java:722) 
at java.awt.EventQueue.access$200(EventQueue.java:103) 
at java.awt.EventQueue$3.run(EventQueue.java:681) 
at java.awt.EventQueue$3.run(EventQueue.java:679) 
at java.security.AccessController.doPrivileged(Native Method) 
at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:75) 
at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:86) 
at java.awt.EventQueue$4.run(EventQueue.java:695) 
at java.awt.EventQueue$4.run(EventQueue.java:693) 
at java.security.AccessController.doPrivileged(Native Method) 
at java.security.ProtectionDomain$1.doIntersectionPrivilege(ProtectionDomain.java:75) 
at java.awt.EventQueue.dispatchEvent(EventQueue.java:692) 
at java.awt.EventDispatchThread.pumpOneEventForFilters(EventDispatchThread.java:244) 
at java.awt.EventDispatchThread.pumpEventsForFilter(EventDispatchThread.java:163) 
at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:151) 
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:147) 
at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:139) 
at java.awt.EventDispatchThread.run(EventDispatchThread.java:97) 
BUILD SUCCESSFUL (total time: 8 seconds) 

Mein Code für die Verbindung ist unten:

public class DBClass { 

public static Connection ConnectDB(){ 

    try{ 
String url = "jdbc:mysql://localhost:3306/"; 
String DBName = "sea"; 
String Drivers = "com.mysql.jdbc.Driver"; 
String user ="root"; 
String pass = ""; 
Class.forName(Drivers); 

     java.sql.Connection con = DriverManager.getConnection(url+DBName,user,pass); 
JOptionPane.showMessageDialog(null, "Connectd"); 
return con; 

}catch (Exception e){ 
JOptionPane.showMessageDialog(null,e); 
e.printStackTrace(); 
return null; 
} 

und die Ausnahme gefangen in Versuch fangen ist unter:

" ERROR java.sql.SQLException: java.lang.VerifyError: (class: com/mysql/jdbc/DatabaseMetaData, method: supportsRefCursors signature:()Z) Illegal use of nonvirtual function call " 

Answer 1

Sie können Java Lambda Version installieren. Java Lambda Version hat dieses Problem gelöst. https://jdk8.java.net/lambda/