MySql接続エラー（Java.lang.VerifyError）（IDE：Netbeans）

Question

私のプロジェクトをWampserverに接続しています。同じプロジェクト同じコードと方法で、他のシステムでは、データベースと接続しますが、私は私のシステム上でそれをしようとすると、それはエラーMSGの下に示しています接続するための

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) 

私のコードは以下の通りです：

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; 
} 

try catchで捕捉された例外は次のとおりです。

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

Answer 1

Java Lambdaバージョンをインストールできます。 Javaラムダ版はこの問題を解決しました。 https://jdk8.java.net/lambda/