java with db4o

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  • oll3i
    Contributor
    • Mar 2007
    • 679
    #1

    java with db4o

    i need to write publisher subscriber application on openjms and use db4o but i dont know how do i add the references to db4o when i compile the app with javac ?
    i added db4o-6.1-java5.jar to my classpath and it doesnt work
    i get
    D:\SYSTEM~2>jav ac Client.java
    Client.java:7: package com.db4o does not exist
    import com.db4o.Db4o;
    ^
    Client.java:8: package com.db4o does not exist
    import com.db4o.Object Container;
    ^
    Client.java:9: package com.db4o does not exist
    import com.db4o.Object Set;
    ^
    Client.java:127 : cannot find symbol
    symbol: class ObjectContainer
    ObjectContainer db = Db4o.openFile(" orde
    rsClient.yap");
    ^
    Client.java:127 : cannot find symbol
    symbol: variable Db4o
    ObjectContainer db = Db4o.openFile(" orde
    rsClient.yap");
    ^
    5 errors
    Thank You
    Tags: None
    • JosAH
      Recognized Expert MVP
      • Mar 2007
      • 11453
      #2
      You either did not correctly add that .jar file to your classpath or that class doesn't
      exist in the jar file you just mentioned. (you can check the jar with winzip).

      kind regards,

      Jos

        Comment

        • oll3i
          Contributor
          • Mar 2007
          • 679
          #3
          i restarted the computer and it compiled without errors but when i run the application form bat and when i send the message i get

          at org.exolab.jms. client.JmsSessi on.onMessage(Jm sSession.java:1 009)
          at org.exolab.jms. client.net.JmsS essionStubImpl. onMessage(JmsSe ssionStub
          Impl.java:478)
          at sun.reflect.Gen eratedMethodAcc essor6.invoke(U nknown Source)
          at sun.reflect.Del egatingMethodAc cessorImpl.invo ke(DelegatingMe thodAcces
          sorImpl.java:25 )
          at java.lang.refle ct.Method.invok e(Method.java:5 97)
          at org.exolab.jms. net.orb.Default ORB$Handler.inv oke(DefaultORB. java:572)

          at org.exolab.jms. net.orb.Default ORB$1.run(Defau ltORB.java:530)
          at EDU.oswego.cs.d l.util.concurre nt.PooledExecut or$Worker.run(U nknown So
          urce)
          at java.lang.Threa d.run(Thread.ja va:619)
          null: 200
          22:40:17.593 ERROR [ORB-Worker-2] - MessageListener threw exception
          java.lang.NoCla ssDefFoundError : com/db4o/Db4o
          at Producent.onMes sage(Producent. java:125)
          at org.exolab.jms. client.JmsMessa geConsumer.onMe ssage(JmsMessag eConsumer
          .java:256)
          at org.exolab.jms. client.JmsSessi on.onMessage(Jm sSession.java:1 009)
          at org.exolab.jms. client.net.JmsS essionStubImpl. onMessage(JmsSe ssionStub
          Impl.java:478)
          at sun.reflect.Gen eratedMethodAcc essor6.invoke(U nknown Source)
          at sun.reflect.Del egatingMethodAc cessorImpl.invo ke(DelegatingMe thodAcces
          sorImpl.java:25 )
          at java.lang.refle ct.Method.invok e(Method.java:5 97)
          at org.exolab.jms. net.orb.Default ORB$Handler.inv oke(DefaultORB. java:572)

          at org.exolab.jms. net.orb.Default ORB$1.run(Defau ltORB.java:530)
          at EDU.oswego.cs.d l.util.concurre nt.PooledExecut or$Worker.run(U nknown So
          urce)
          at java.lang.Threa d.run(Thread.ja va:619)
          null: 200
          22:40:17.593 ERROR [ORB-Worker-1] - MessageListener threw exception
          java.lang.NoCla ssDefFoundError : com/db4o/Db4o
          at Producent.onMes sage(Producent. java:125)
          at org.exolab.jms. client.JmsMessa geConsumer.onMe ssage(JmsMessag eConsumer
          .java:256)
          at org.exolab.jms. client.JmsSessi on.onMessage(Jm sSession.java:1 009)
          at org.exolab.jms. client.net.JmsS essionStubImpl. onMessage(JmsSe ssionStub
          Impl.java:478)
          at sun.reflect.Gen eratedMethodAcc essor6.invoke(U nknown Source)
          at sun.reflect.Del egatingMethodAc cessorImpl.invo ke(DelegatingMe thodAcces
          sorImpl.java:25 )
          at java.lang.refle ct.Method.invok e(Method.java:5 97)
          at org.exolab.jms. net.orb.Default ORB$Handler.inv oke(DefaultORB. java:572)

          at org.exolab.jms. net.orb.Default ORB$1.run(Defau ltORB.java:530)
          at EDU.oswego.cs.d l.util.concurre nt.PooledExecut or$Worker.run(U nknown So
          urce)
          at java.lang.Threa d.run(Thread.ja va:619)
          null: 200
          22:40:17.593 ERROR [ORB-Worker-2] - MessageListener threw exception
          java.lang.NoCla ssDefFoundError : com/db4o/Db4o
          at Producent.onMes sage(Producent. java:125)
          at org.exolab.jms. client.JmsMessa geConsumer.onMe ssage(JmsMessag eConsumer
          .java:256)
          at org.exolab.jms. client.JmsSessi on.onMessage(Jm sSession.java:1 009)
          at org.exolab.jms. client.net.JmsS essionStubImpl. onMessage(JmsSe ssionStub
          Impl.java:478)
          at sun.reflect.Gen eratedMethodAcc essor6.invoke(U nknown Source)
          at sun.reflect.Del egatingMethodAc cessorImpl.invo ke(DelegatingMe thodAcces
          sorImpl.java:25 )
          at java.lang.refle ct.Method.invok e(Method.java:5 97)
          at org.exolab.jms. net.orb.Default ORB$Handler.inv oke(DefaultORB. java:572)

          at org.exolab.jms. net.orb.Default ORB$1.run(Defau ltORB.java:530)
          at EDU.oswego.cs.d l.util.concurre nt.PooledExecut or$Worker.run(U nknown So
          urce)
          at java.lang.Threa d.run(Thread.ja va:619)
          null: 200
          22:40:17.593 ERROR [ORB-Worker-1] - MessageListener threw exception
          java.lang.NoCla ssDefFoundError : com/db4o/Db4o
          at Producent.onMes sage(Producent. java:125)
          at org.exolab.jms. client.JmsMessa geConsumer.onMe ssage(JmsMessag eConsumer
          .java:256)
          at org.exolab.jms. client.JmsSessi on.onMessage(Jm sSession.java:1 009)
          at org.exolab.jms. client.net.JmsS essionStubImpl. onMessage(JmsSe ssionStub
          Impl.java:478)
          at sun.reflect.Gen eratedMethodAcc essor6.invoke(U nknown Source)
          at sun.reflect.Del egatingMethodAc cessorImpl.invo ke(DelegatingMe thodAcces
          sorImpl.java:25 )
          at java.lang.refle ct.Method.invok e(Method.java:5 97)
          at org.exolab.jms. net.orb.Default ORB$Handler.inv oke(DefaultORB. java:572)

          at org.exolab.jms. net.orb.Default ORB$1.run(Defau ltORB.java:530)
          at EDU.oswego.cs.d l.util.concurre nt.PooledExecut or$Worker.run(U nknown So
          urce)
          at java.lang.Threa d.run(Thread.ja va:619)
          null: 200
          22:40:17.609 ERROR [ORB-Worker-2] - MessageListener threw exception
          java.lang.NoCla ssDefFoundError : com/db4o/Db4o
          at Producent.onMes sage(Producent. java:125)
          at org.exolab.jms. client.JmsMessa geConsumer.onMe ssage(JmsMessag eConsumer
          .java:256)
          at org.exolab.jms. client.JmsSessi on.onMessage(Jm sSession.java:1 009)
          at org.exolab.jms. client.net.JmsS essionStubImpl. onMessage(JmsSe ssionStub
          Impl.java:478)
          at sun.reflect.Gen eratedMethodAcc essor6.invoke(U nknown Source)
          at sun.reflect.Del egatingMethodAc cessorImpl.invo ke(DelegatingMe thodAcces
          sorImpl.java:25 )
          at java.lang.refle ct.Method.invok e(Method.java:5 97)
          at org.exolab.jms. net.orb.Default ORB$Handler.inv oke(DefaultORB. java:572)

          at org.exolab.jms. net.orb.Default ORB$1.run(Defau ltORB.java:530)
          at EDU.oswego.cs.d l.util.concurre nt.PooledExecut or$Worker.run(U nknown So
          urce)
          at java.lang.Threa d.run(Thread.ja va:619)
          null: 200
          22:40:17.609 ERROR [ORB-Worker-1] - MessageListener threw exception
          java.lang.NoCla ssDefFoundError : com/db4o/Db4o
          at Producent.onMes sage(Producent. java:125)
          at org.exolab.jms. client.JmsMessa geConsumer.onMe ssage(JmsMessag eConsumer
          .java:256)
          at org.exolab.jms. client.JmsSessi on.onMessage(Jm sSession.java:1 009)
          at org.exolab.jms. client.net.JmsS essionStubImpl. onMessage(JmsSe ssionStub
          Impl.java:478)
          at sun.reflect.Gen eratedMethodAcc essor6.invoke(U nknown Source)
          at sun.reflect.Del egatingMethodAc cessorImpl.invo ke(DelegatingMe thodAcces
          sorImpl.java:25 )
          at java.lang.refle ct.Method.invok e(Method.java:5 97)
          at org.exolab.jms. net.orb.Default ORB$Handler.inv oke(DefaultORB. java:572)

          at org.exolab.jms. net.orb.Default ORB$1.run(Defau ltORB.java:530)
          at EDU.oswego.cs.d l.util.concurre nt.PooledExecut or$Worker.run(U nknown So
          urce)
          at java.lang.Threa d.run(Thread.ja va:619)
          null: 200
          22:40:17.609 ERROR [ORB-Worker-2] - MessageListener threw exception
          java.lang.NoCla ssDefFoundError : com/db4o/Db4o
          at Producent.onMes sage(Producent. java:125)
          at org.exolab.jms. client.JmsMessa geConsumer.onMe ssage(JmsMessag eConsumer
          .java:256)
          at org.exolab.jms. client.JmsSessi on.onMessage(Jm sSession.java:1 009)
          at org.exolab.jms. client.net.JmsS essionStubImpl. onMessage(JmsSe ssionStub
          Impl.java:478)
          at sun.reflect.Gen eratedMethodAcc essor6.invoke(U nknown Source)
          at sun.reflect.Del egatingMethodAc cessorImpl.invo ke(DelegatingMe thodAcces
          sorImpl.java:25 )
          at java.lang.refle ct.Method.invok e(Method.java:5 97)
          at org.exolab.jms. net.orb.Default ORB$Handler.inv oke(DefaultORB. java:572)

          at org.exolab.jms. net.orb.Default ORB$1.run(Defau ltORB.java:530)
          at EDU.oswego.cs.d l.util.concurre nt.PooledExecut or$Worker.run(U nknown So
          urce)
          at java.lang.Threa d.run(Thread.ja va:619)
          null: 200
          22:40:17.609 ERROR [ORB-Worker-1] - MessageListener threw exception
          java.lang.NoCla ssDefFoundError : com/db4o/Db4o
          at Producent.onMes sage(Producent. java:125)
          at org.exolab.jms. client.JmsMessa geConsumer.onMe ssage(JmsMessag eConsumer
          .java:256)
          at org.exolab.jms. client.JmsSessi on.onMessage(Jm sSession.java:1 009)
          at org.exolab.jms. client.net.JmsS essionStubImpl. onMessage(JmsSe ssionStub
          Impl.java:478)
          at sun.reflect.Gen eratedMethodAcc essor6.invoke(U nknown Source)
          at sun.reflect.Del egatingMethodAc cessorImpl.invo ke(DelegatingMe thodAcces
          sorImpl.java:25 )
          at java.lang.refle ct.Method.invok e(Method.java:5 97)
          at org.exolab.jms. net.orb.Default ORB$Handler.inv oke(DefaultORB. java:572)

          at org.exolab.jms. net.orb.Default ORB$1.run(Defau ltORB.java:530)
          at EDU.oswego.cs.d l.util.concurre nt.PooledExecut or$Worker.run(U nknown So
          urce)
          at java.lang.Threa d.run(Thread.ja va:619)
          null: 200
          22:40:17.640 ERROR [ORB-Worker-2] - MessageListener threw exception
          java.lang.NoCla ssDefFoundError : com/db4o/Db4o
          at Producent.onMes sage(Producent. java:125)
          at org.exolab.jms. client.JmsMessa geConsumer.onMe ssage(JmsMessag eConsumer
          .java:256)
          at org.exolab.jms. client.JmsSessi on.onMessage(Jm sSession.java:1 009)
          at org.exolab.jms. client.net.JmsS essionStubImpl. onMessage(JmsSe ssionStub
          Impl.java:478)
          at sun.reflect.Gen eratedMethodAcc essor6.invoke(U nknown Source)
          at sun.reflect.Del egatingMethodAc cessorImpl.invo ke(DelegatingMe thodAcces
          sorImpl.java:25 )
          at java.lang.refle ct.Method.invok e(Method.java:5 97)
          at org.exolab.jms. net.orb.Default ORB$Handler.inv oke(DefaultORB. java:572)

          at org.exolab.jms. net.orb.Default ORB$1.run(Defau ltORB.java:530)
          at EDU.oswego.cs.d l.util.concurre nt.PooledExecut or$Worker.run(U nknown So
          urce)
          at java.lang.Threa d.run(Thread.ja va:619)
          null: 200
          22:40:17.656 ERROR [ORB-Worker-1] - MessageListener threw exception
          java.lang.NoCla ssDefFoundError : com/db4o/Db4o
          at Producent.onMes sage(Producent. java:125)
          at org.exolab.jms. client.JmsMessa geConsumer.onMe ssage(JmsMessag eConsumer
          .java:256)
          at org.exolab.jms. client.JmsSessi on.onMessage(Jm sSession.java:1 009)
          at org.exolab.jms. client.net.JmsS essionStubImpl. onMessage(JmsSe ssionStub
          Impl.java:478)
          at sun.reflect.Gen eratedMethodAcc essor6.invoke(U nknown Source)
          at sun.reflect.Del egatingMethodAc cessorImpl.invo ke(DelegatingMe thodAcces
          sorImpl.java:25 )
          at java.lang.refle ct.Method.invok e(Method.java:5 97)
          at org.exolab.jms. net.orb.Default ORB$Handler.inv oke(DefaultORB. java:572)

          at org.exolab.jms. net.orb.Default ORB$1.run(Defau ltORB.java:530)
          at EDU.oswego.cs.d l.util.concurre nt.PooledExecut or$Worker.run(U nknown So
          urce)
          at java.lang.Threa d.run(Thread.ja va:619)
          null: 200
          22:40:17.656 ERROR [ORB-Worker-2] - MessageListener threw exception
          java.lang.NoCla ssDefFoundError : com/db4o/Db4o
          at Producent.onMes sage(Producent. java:125)
          at org.exolab.jms. client.JmsMessa geConsumer.onMe ssage(JmsMessag eConsumer
          .java:256)
          at org.exolab.jms. client.JmsSessi on.onMessage(Jm sSession.java:1 009)
          at org.exolab.jms. client.net.JmsS essionStubImpl. onMessage(JmsSe ssionStub
          Impl.java:478)
          at sun.reflect.Gen eratedMethodAcc essor6.invoke(U nknown Source)
          at sun.reflect.Del egatingMethodAc cessorImpl.invo ke(DelegatingMe thodAcces
          sorImpl.java:25 )
          at java.lang.refle ct.Method.invok e(Method.java:5 97)
          at org.exolab.jms. net.orb.Default ORB$Handler.inv oke(DefaultORB. java:572)

          at org.exolab.jms. net.orb.Default ORB$1.run(Defau ltORB.java:530)
          at EDU.oswego.cs.d l.util.concurre nt.PooledExecut or$Worker.run(U nknown So
          urce)
          at java.lang.Threa d.run(Thread.ja va:619)
          null: 200
          22:40:17.656 ERROR [ORB-Worker-1] - MessageListener threw exception
          java.lang.NoCla ssDefFoundError : com/db4o/Db4o
          at Producent.onMes sage(Producent. java:125)
          at org.exolab.jms. client.JmsMessa geConsumer.onMe ssage(JmsMessag eConsumer
          .java:256)
          at org.exolab.jms. client.JmsSessi on.onMessage(Jm sSession.java:1 009)
          at org.exolab.jms. client.net.JmsS essionStubImpl. onMessage(JmsSe ssionStub
          Impl.java:478)
          at sun.reflect.Gen eratedMethodAcc essor6.invoke(U nknown Source)
          at sun.reflect.Del egatingMethodAc cessorImpl.invo ke(DelegatingMe thodAcces
          sorImpl.java:25 )
          at java.lang.refle ct.Method.invok e(Method.java:5 97)
          at org.exolab.jms. net.orb.Default ORB$Handler.inv oke(DefaultORB. java:572)

          at org.exolab.jms. net.orb.Default ORB$1.run(Defau ltORB.java:530)
          at EDU.oswego.cs.d l.util.concurre nt.PooledExecut or$Worker.run(U nknown So
          urce)
          at java.lang.Threa d.run(Thread.ja va:619)
          null: 200
          22:40:17.671 ERROR [ORB-Worker-2] - MessageListener threw exception
          java.lang.NoCla ssDefFoundError : com/db4o/Db4o
          at Producent.onMes sage(Producent. java:125)
          at org.exolab.jms. client.JmsMessa geConsumer.onMe ssage(JmsMessag eConsumer
          .java:256)
          at org.exolab.jms. client.JmsSessi on.onMessage(Jm sSession.java:1 009)
          at org.exolab.jms. client.net.JmsS essionStubImpl. onMessage(JmsSe ssionStub
          Impl.java:478)
          at sun.reflect.Gen eratedMethodAcc essor6.invoke(U nknown Source)
          at sun.reflect.Del egatingMethodAc cessorImpl.invo ke(DelegatingMe thodAcces
          sorImpl.java:25 )
          at java.lang.refle ct.Method.invok e(Method.java:5 97)
          at org.exolab.jms. net.orb.Default ORB$Handler.inv oke(DefaultORB. java:572)

          at org.exolab.jms. net.orb.Default ORB$1.run(Defau ltORB.java:530)
          at EDU.oswego.cs.d l.util.concurre nt.PooledExecut or$Worker.run(U nknown So
          urce)
          at java.lang.Threa d.run(Thread.ja va:619)
          null: 200
          22:40:17.671 ERROR [ORB-Worker-1] - MessageListener threw exception
          java.lang.NoCla ssDefFoundError : com/db4o/Db4o
          at Producent.onMes sage(Producent. java:125)
          at org.exolab.jms. client.JmsMessa geConsumer.onMe ssage(JmsMessag eConsumer
          .java:256)
          at org.exolab.jms. client.JmsSessi on.onMessage(Jm sSession.java:1 009)
          at org.exolab.jms. client.net.JmsS essionStubImpl. onMessage(JmsSe ssionStub
          Impl.java:478)
          at sun.reflect.Gen eratedMethodAcc essor6.invoke(U nknown Source)
          at sun.reflect.Del egatingMethodAc cessorImpl.invo ke(DelegatingMe thodAcces
          sorImpl.java:25 )
          at java.lang.refle ct.Method.invok e(Method.java:5 97)
          at org.exolab.jms. net.orb.Default ORB$Handler.inv oke(DefaultORB. java:572)

          at org.exolab.jms. net.orb.Default ORB$1.run(Defau ltORB.java:530)
          at EDU.oswego.cs.d l.util.concurre nt.PooledExecut or$Worker.run(U nknown So
          urce)
          at java.lang.Threa d.run(Thread.ja va:619)
          null: 200
          22:40:17.671 ERROR [ORB-Worker-2] - MessageListener threw exception
          java.lang.NoCla ssDefFoundError : com/db4o/Db4o
          at Producent.onMes sage(Producent. java:125)
          at org.exolab.jms. client.JmsMessa geConsumer.onMe ssage(JmsMessag eConsumer
          .java:256)
          at org.exolab.jms. client.JmsSessi on.onMessage(Jm sSession.java:1 009)
          at org.exolab.jms. client.net.JmsS essionStubImpl. onMessage(JmsSe ssionStub
          Impl.java:478)
          at sun.reflect.Gen eratedMethodAcc essor6.invoke(U nknown Source)
          at sun.reflect.Del egatingMethodAc cessorImpl.invo ke(DelegatingMe thodAcces
          sorImpl.java:25 )
          at java.lang.refle ct.Method.invok e(Method.java:5 97)
          at org.exolab.jms. net.orb.Default ORB$Handler.inv oke(DefaultORB. java:572)

          at org.exolab.jms. net.orb.Default ORB$1.run(Defau ltORB.java:530)
          at EDU.oswego.cs.d l.util.concurre nt.PooledExecut or$Worker.run(U nknown So
          urce)
          at java.lang.Threa d.run(Thread.ja va:619)

          is it db4o causing that ?

            Comment

            • oll3i
              Contributor
              • Mar 2007
              • 679
              #4
              db4o and java

              why i get

              Exception in thread "AWT-EventQueue-0" java.lang.NoCla ssDefFoundError : com/db4o/
              Db4o
              at Producent$3.act ionPerformed(pr oducent.java:30 1)
              at javax.swing.Abs tractButton.fir eActionPerforme d(AbstractButto n.java:19
              95)
              at javax.swing.Abs tractButton$Han dler.actionPerf ormed(AbstractB utton.jav
              a:2318)
              at javax.swing.Def aultButtonModel .fireActionPerf ormed(DefaultBu ttonModel
              .java:387)
              at javax.swing.Def aultButtonModel .setPressed(Def aultButtonModel .java:242
              )
              at javax.swing.pla f.basic.BasicBu ttonListener.mo useReleased(Bas icButtonL
              istener.java:23 6)
              at java.awt.Compon ent.processMous eEvent(Componen t.java:6038)
              at javax.swing.JCo mponent.process MouseEvent(JCom ponent.java:326 0)
              at java.awt.Compon ent.processEven t(Component.jav a:5803)
              at java.awt.Contai ner.processEven t(Container.jav a:2058)
              at java.awt.Compon ent.dispatchEve ntImpl(Componen t.java:4410)
              at java.awt.Contai ner.dispatchEve ntImpl(Containe r.java:2116)
              at java.awt.Compon ent.dispatchEve nt(Component.ja va:4240)
              at java.awt.Lightw eightDispatcher .retargetMouseE vent(Container. java:4322
              )
              at java.awt.Lightw eightDispatcher .processMouseEv ent(Container.j ava:3986)

              at java.awt.Lightw eightDispatcher .dispatchEvent( Container.java: 3916)
              at java.awt.Contai ner.dispatchEve ntImpl(Containe r.java:2102)
              at java.awt.Window .dispatchEventI mpl(Window.java :2429)
              at java.awt.Compon ent.dispatchEve nt(Component.ja va:4240)
              at java.awt.EventQ ueue.dispatchEv ent(EventQueue. java:599)
              at java.awt.EventD ispatchThread.p umpOneEventForF ilters(EventDis patchThre
              ad.java:273)
              at java.awt.EventD ispatchThread.p umpEventsForFil ter(EventDispat chThread.
              java:183)
              at java.awt.EventD ispatchThread.p umpEventsForHie rarchy(EventDis patchThre
              ad.java:173)
              at java.awt.EventD ispatchThread.p umpEvents(Event DispatchThread. java:168)

              at java.awt.EventD ispatchThread.p umpEvents(Event DispatchThread. java:160)

              at java.awt.EventD ispatchThread.r un(EventDispatc hThread.java:12 1)
              after i click the button to display all orders from db4o file

              [code=java]
              display_orders_ button.addActio nListener( new ActionListener( ) {
              public void actionPerformed (ActionEvent e) {
              OrderProducent op = new OrderProducent( null,null,0);
              ObjectContainer db = Db4o.openFile(" ordersProducer. yap");
              ObjectSet result = db.get(op);
              display_orders_ history.setText ("");
              while(result.ha sNext()){
              System.out.prin tln(result.next ()+"\n");
              display_orders_ history.append( result.next()+" \n");
              }
              }});
              [/code]

              thank you
              Last edited by oll3i; Jun 10 '07, 12:28 AM. Reason: tags

                Comment

                • JosAH
                  Recognized Expert MVP
                  • Mar 2007
                  • 11453
                  #5
                  Originally posted by oll3i
                  i restarted the computer and it compiled without errors but when i run the application form bat and when i send the message i get

                  <lots of wallpaper snipped>

                  java.lang.NoCla ssDefFoundError : com/db4o/Db4o

                  is it db4o causing that ?
                  You can that again. If everything compiled fine but the jvm throws that in your
                  face, the classpath for compilation was correct while the classpath for your
                  jvm is still wrong, i.e. the classpath doesn't point to the .jar you need.

                  kind regards,

                  Jos

                    Comment

                    • JosAH
                      Recognized Expert MVP
                      • Mar 2007
                      • 11453
                      #6
                      This is the same error as you showed in your other thread: the classpath isn't
                      correctly set; it doesn't include that db4o jar.

                      kind regards,

                      Jos

                        Comment

                        • r035198x
                          MVP
                          • Sep 2006
                          • 13225
                          #7
                          Originally posted by oll3i
                          why i get

                          Exception in thread "AWT-EventQueue-0" java.lang.NoCla ssDefFoundError : com/db4o/
                          Db4o
                          at Producent$3.act ionPerformed(pr oducent.java:30 1)
                          at javax.swing.Abs tractButton.fir eActionPerforme d(AbstractButto n.java:19
                          95)
                          at javax.swing.Abs tractButton$Han dler.actionPerf ormed(AbstractB utton.jav
                          a:2318)
                          at javax.swing.Def aultButtonModel .fireActionPerf ormed(DefaultBu ttonModel
                          .java:387)
                          at javax.swing.Def aultButtonModel .setPressed(Def aultButtonModel .java:242
                          )
                          at javax.swing.pla f.basic.BasicBu ttonListener.mo useReleased(Bas icButtonL
                          istener.java:23 6)
                          at java.awt.Compon ent.processMous eEvent(Componen t.java:6038)
                          at javax.swing.JCo mponent.process MouseEvent(JCom ponent.java:326 0)
                          at java.awt.Compon ent.processEven t(Component.jav a:5803)
                          at java.awt.Contai ner.processEven t(Container.jav a:2058)
                          at java.awt.Compon ent.dispatchEve ntImpl(Componen t.java:4410)
                          at java.awt.Contai ner.dispatchEve ntImpl(Containe r.java:2116)
                          at java.awt.Compon ent.dispatchEve nt(Component.ja va:4240)
                          at java.awt.Lightw eightDispatcher .retargetMouseE vent(Container. java:4322
                          )
                          at java.awt.Lightw eightDispatcher .processMouseEv ent(Container.j ava:3986)

                          at java.awt.Lightw eightDispatcher .dispatchEvent( Container.java: 3916)
                          at java.awt.Contai ner.dispatchEve ntImpl(Containe r.java:2102)
                          at java.awt.Window .dispatchEventI mpl(Window.java :2429)
                          at java.awt.Compon ent.dispatchEve nt(Component.ja va:4240)
                          at java.awt.EventQ ueue.dispatchEv ent(EventQueue. java:599)
                          at java.awt.EventD ispatchThread.p umpOneEventForF ilters(EventDis patchThre
                          ad.java:273)
                          at java.awt.EventD ispatchThread.p umpEventsForFil ter(EventDispat chThread.
                          java:183)
                          at java.awt.EventD ispatchThread.p umpEventsForHie rarchy(EventDis patchThre
                          ad.java:173)
                          at java.awt.EventD ispatchThread.p umpEvents(Event DispatchThread. java:168)

                          at java.awt.EventD ispatchThread.p umpEvents(Event DispatchThread. java:160)

                          at java.awt.EventD ispatchThread.r un(EventDispatc hThread.java:12 1)
                          after i click the button to display all orders from db4o file

                          [code=java]
                          display_orders_ button.addActio nListener( new ActionListener( ) {
                          public void actionPerformed (ActionEvent e) {
                          OrderProducent op = new OrderProducent( null,null,0);
                          ObjectContainer db = Db4o.openFile(" ordersProducer. yap");
                          ObjectSet result = db.get(op);
                          display_orders_ history.setText ("");
                          while(result.ha sNext()){
                          System.out.prin tln(result.next ()+"\n");
                          display_orders_ history.append( result.next()+" \n");
                          }
                          }});
                          [/code]

                          thank you
                          The Db4o class was not found during execution .

                            Comment

                            • r035198x
                              MVP
                              • Sep 2006
                              • 13225
                              #8
                              Originally posted by JosAH
                              This is the same error as you showed in your other thread: the classpath isn't
                              correctly set; it doesn't include that db4o jar.

                              kind regards,

                              Jos
                              Please do not double post.
                              Threads merged.

                                Comment

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