<JDBCDataSource JNDIName="cxw" Name="cxw" PoolName="myPool" Targets="myserver"/> <JTA Name="mydomain"/>调用程序： public Dataconn() { Hashtable ht = new Hashtable(); ht.put（Context.INITIAL_CONTEXT_FACTORY,"weblogic.jndi.WLInitialContextFactory"); ht.put(Context.PROVIDER_URL,"t3://localhost");
ctx = new InitialContext(ht); GetConn(); } //连接数据库 public Connection getConn() throws Exception {
if(conn!=null) return conn; javax.sql.DataSource ds = (javax.sql.DataSource) ctx.lookup ("myPool"); conn = ds.getConnection(); return conn; }报如下错误： javax.naming.NameNotFoundException: Unable to resolve myPool. Resolved: '' Unresolved:'myPool' ; remaining name '' at weblogic.rmi.internal.AbstractOutboundRequest.sendReceive(AbstractOutboundRequest.java:90) at weblogic.rmi.cluster.ReplicaAwareRemoteRef.invoke(ReplicaAwareRemoteRef.java:247) at weblogic.rmi.cluster.ReplicaAwareRemoteRef.invoke(ReplicaAwareRemoteRef.java:225) at weblogic.jndi.internal.ServerNamingNode_WLStub.lookup(ServerNamingNode_WLStub.java:121) at weblogic.jndi.internal.WLContextImpl.lookup(WLContextImpl.java:323) at javax.naming.InitialContext.lookup(InitialContext.java:350) at Dataconn.Dataconn.getConn(Dataconn.java:57) at Dataconn.Dataconn.selectSql(Dataconn.java:66) at Dataconn.Applet1.paint(Applet1.java:20) at sun.awt.RepaintArea.paint(RepaintArea.java:298) at sun.awt.windows.WComponentPeer.handleEvent(WComponentPeer.java:199) at java.awt.Component.dispatchEventImpl(Component.java:2665) at java.awt.Container.dispatchEventImpl(Container.java:1216) at java.awt.Component.dispatchEvent(Component.java:2499) at java.awt.EventQueue.dispatchEvent(EventQueue.java:336) at java.awt.EventDispatchThread.pumpOneEventForHierarchy(EventDispatchThread.java:134) at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:101) at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:96) at java.awt.EventDispatchThread.run(EventDispatchThread.java:88)Exception occurred during event dispatching:java.lang.NullPointerException at Dataconn.Applet1.paint(Applet1.java:24) at sun.awt.RepaintArea.paint(RepaintArea.java:298) at sun.awt.windows.WComponentPeer.handleEvent(WComponentPeer.java:199) at java.awt.Component.dispatchEventImpl(Component.java:2665) at java.awt.Container.dispatchEventImpl(Container.java:1216) at java.awt.Component.dispatchEvent(Component.java:2499) at java.awt.EventQueue.dispatchEvent(EventQueue.java:336) at java.awt.EventDispatchThread.pumpOneEventForHierarchy(EventDispatchThread.java:134) at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:101) at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:96) at java.awt.EventDispatchThread.run(EventDispatchThread.java:88)麻烦了！
试了多次，又出现 java.sql.SQLException: weblogic.common.ResourceException: No resources available 没找到数据源，但我在config.xml里配置了啊，检查了url也没错，不过小酋长说要在console里配置data source，这应该跟在config.xml里配置没区别吧
你把oracle的jdbc包加到weblogic的类路径里了吗？
我把oracle jdbc放到 bea\wlserver6.0\lib下，原来的问题可能解决了，但是又出现以下错误 2001-12-7 下午04时21分17秒> <Info> <ConnectionManager> <Bootstrap unable to get a direct: 'Protocol: 't3''connection to: '0S:127.0.0.1:[7001,-1,-1,-1,-1,-1,-1]' on port: '7001'java.rmi.ConnectException: Destination unreachable; nested exception is: java.net.ConnectException: Connection refused: connectjava.net.ConnectException: Connection refused: connect at java.net.PlainSocketImpl.socketConnect(Native Method) at java.net.PlainSocketImpl.doConnect(PlainSocketImpl.java:323) at java.net.PlainSocketImpl.connectToAddress(PlainSocketImpl.java:136) at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:123) at java.net.Socket.<init>(Socket.java:273) at java.net.Socket.<init>(Socket.java:127) at weblogic.rjvm.t3.T3JVMConnection.newSocket(T3JVMConnection.java:324) at weblogic.rjvm.t3.T3JVMConnection.newSocketWithRetry(T3JVMConnection.java:312) at weblogic.rjvm.t3.T3JVMConnection.connect(T3JVMConnection.java:74) at weblogic.rjvm.t3.T3JVMConnection.createConnection(T3JVMConnection.java:148) at weblogic.rjvm.Protocol.createConnection(Protocol.java:201) at weblogic.rjvm.ConnectionManager.findOrCreateConnection(ConnectionManager.java:1077) at weblogic.rjvm.ConnectionManager.bootstrap(ConnectionManager.java:365) at weblogic.rjvm.ConnectionManager.bootstrap(ConnectionManager.java:330) at weblogic.rjvm.RJVMManager.findOrCreateRemoteInternal(RJVMManager.java:228) at weblogic.rjvm.RJVMManager.findOrCreate(RJVMManager.java:188) at weblogic.rjvm.RJVMFinder.findOrCreateRemoteServer(RJVMFinder.java:180) at weblogic.rjvm.RJVMFinder.findOrCreate(RJVMFinder.java:149) at weblogic.rjvm.ServerURL.findOrCreateRJVM(ServerURL.java:207) at weblogic.jndi.WLInitialContextFactoryDelegate.getInitialContext(WLInitialContextFactoryDelegate.java:235) at weblogic.jndi.WLInitialContextFactoryDelegate.getInitialContext(WLInitialContextFactoryDelegate.java:176) at weblogic.jndi.WLInitialContextFactory.getInitialContext(WLInitialContextFactory.java:123) at javax.naming.spi.NamingManager.getInitialContext(NamingManager.java:668) at javax.naming.InitialContext.getDefaultInitCtx(InitialContext.java:246) at javax.naming.InitialContext.init(InitialContext.java:222) at javax.naming.InitialContext.<init>(InitialContext.java:198) at Dataconn.Dataconn.getConn(Dataconn.java:55) at Dataconn.Dataconn.selectSql(Dataconn.java:67) at Dataconn.Applet1.paint(Applet1.java:20) at sun.awt.RepaintArea.paint(RepaintArea.java:298) at sun.awt.windows.WComponentPeer.handleEvent(WComponentPeer.java:199) at java.awt.Component.dispatchEventImpl(Component.java:2665) at java.awt.Container.dispatchEventImpl(Container.java:1216) at java.awt.Component.dispatchEvent(Component.java:2499) at java.awt.EventQueue.dispatchEvent(EventQueue.java:336) at java.awt.EventDispatchThread.pumpOneEventForHierarchy(EventDispatchThread.java:134) at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:101) at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:96) at java.awt.EventDispatchThread.run(EventDispatchThread.java:88)> <2001-12-7 下午04时21分17秒> <Info> <ConnectionManager> <Bootstrap unable to get a routed: 'Protocol: 't3'' connection to: '0S:127.0.0.1:[7001,-1,-1,-1,-1,-1,-1]' on port: '7001'java.rmi.ConnectException: No available router to destination at weblogic.rjvm.ConnectionManager.findOrCreateRouter(ConnectionManager.java:1167) at weblogic.rjvm.ConnectionManager.bootstrap(ConnectionManager.java:378) at weblogic.rjvm.ConnectionManager.bootstrap(ConnectionManager.java:330) at weblogic.rjvm.RJVMManager.findOrCreateRemoteInternal(RJVMManager.java:228) at weblogic.rjvm.RJVMManager.findOrCreate(RJVMManager.java:188) at weblogic.rjvm.RJVMFinder.findOrCreateRemoteServer(RJVMFinder.java:180) at weblogic.rjvm.RJVMFinder.findOrCreate(RJVMFinder.java:149) at weblogic.rjvm.ServerURL.findOrCreateRJVM(ServerURL.java:207) at weblogic.jndi.WLInitialContextFactoryDelegate.getInitialContext(WLInitialContextFactoryDelegate.java:235) at weblogic.jndi.WLInitialContextFactoryDelegate.getInitialContext(WLInitialContextFactoryDelegate.java:176) at weblogic.jndi.WLInitialContextFactory.getInitialContext(WLInitialContextFactory.java:123) at javax.naming.spi.NamingManager.getInitialContext(NamingManager.java:668) at javax.naming.InitialContext.getDefaultInitCtx(InitialContext.java:246) at javax.naming.InitialContext.init(InitialContext.java:222) at javax.naming.InitialContext.<init>(InitialContext.java:198) at Dataconn.Dataconn.getConn(Dataconn.java:55) at Dataconn.Dataconn.selectSql(Dataconn.java:67) at Dataconn.Applet1.paint(Applet1.java:20) at sun.awt.RepaintArea.paint(RepaintArea.java:298) at sun.awt.windows.WComponentPeer.handleEvent(WComponentPeer.java:199) at java.awt.Component.dispatchEventImpl(Component.java:2665) at java.awt.Container.dispatchEventImpl(Container.java:1216) at java.awt.Component.dispatchEvent(Component.java:2499) at java.awt.EventQueue.dispatchEvent(EventQueue.java:336) at java.awt.EventDispatchThread.pumpOneEventForHierarchy(EventDispatchThread.java:134) at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:101) at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:96) at java.awt.EventDispatchThread.run(EventDispatchThread.java:88)> 出错信息......javax.naming.CommunicationException. Root exception is java.net.ConnectException: No server found at T3://localhost:7001 at weblogic.rjvm.RJVMFinder.findOrCreate(RJVMFinder.java:155) at weblogic.rjvm.ServerURL.findOrCreateRJVM(ServerURL.java:207) at weblogic.jndi.WLInitialContextFactoryDelegate.getInitialContext(WLInitialContextFactoryDelegate.java:235) at weblogic.jndi.WLInitialContextFactoryDelegate.getInitialContext(WLInitialContextFactoryDelegate.java:176) at weblogic.jndi.WLInitialContextFactory.getInitialContext(WLInitialContextFactory.java:123) at javax.naming.spi.NamingManager.getInitialContext(NamingManager.java:668) at javax.naming.InitialContext.getDefaultInitCtx(InitialContext.java:246) at javax.naming.InitialContext.init(InitialContext.java:222) at javax.naming.InitialContext.<init>(InitialContext.java:198) at Dataconn.Dataconn.getConn(Dataconn.java:55) at Dataconn.Dataconn.selectSql(Dataconn.java:67) at Dataconn.Applet1.paint(Applet1.java:20) at sun.awt.RepaintArea.paint(RepaintArea.java:298) at sun.awt.windows.WComponentPeer.handleEvent(WComponentPeer.java:199) at java.awt.Component.dispatchEventImpl(Component.java:2665) at java.awt.Container.dispatchEventImpl(Container.java:1216) at java.awt.Component.dispatchEvent(Component.java:2499) at java.awt.EventQueue.dispatchEvent(EventQueue.java:336) at java.awt.EventDispatchThread.pumpOneEventForHierarchy(EventDispatchThread.java:134) at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:101) at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:96) at java.awt.EventDispatchThread.run(EventDispatchThread.java:88)Exception occurred during event dispatching:java.lang.NullPointerException at Dataconn.Applet1.paint(Applet1.java:24) at sun.awt.RepaintArea.paint(RepaintArea.java:298) at sun.awt.windows.WComponentPeer.handleEvent(WComponentPeer.java:199) at java.awt.Component.dispatchEventImpl(Component.java:2665) at java.awt.Container.dispatchEventImpl(Container.java:1216) at java.awt.Component.dispatchEvent(Component.java:2499) at java.awt.EventQueue.dispatchEvent(EventQueue.java:336) at java.awt.EventDispatchThread.pumpOneEventForHierarchy(EventDispatchThread.java:134) at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:101) at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:96) at java.awt.EventDispatchThread.run(EventDispatchThread.java:88)
象我的设置是这样的
<JDBCConnectionPool DriverName="oracle.jdbc.driver.OracleDriver"
Name="myPool"
Properties="user=cscadm;password=cscadm"
Targets="myserver" TestConnectionsOnRelease="false"
TestConnectionsOnReserve="false" TestTableName="" URL="jdbc:oracle:thin:@100.100.100.1:1521:CSCSH"/>
<JDBCDataSource JNDIName="myDataSource" Name="myDataSource"
PoolName="myPool" Targets="myserver"/>
config.xml配置
<JDBCConnectionPool DriverName="oracle.jdbc.driver.OracleDriver"
Name="myPool"
Properties="user=1234;password=1234"
Targets="myserver" TestConnectionsOnRelease="false"
TestConnectionsOnReserve="false" TestTableName="" URL="jdbc:oracle:thin:@192.168.0.1:1521:oracl"/>
<JDBCDataSource JNDIName="cxw" Name="cxw"
PoolName="myPool" Targets="myserver"/>
<JTA Name="mydomain"/>调用程序：
public Dataconn()
{
Hashtable ht = new Hashtable();
ht.put（Context.INITIAL_CONTEXT_FACTORY,"weblogic.jndi.WLInitialContextFactory");
ht.put(Context.PROVIDER_URL,"t3://localhost");
ctx = new InitialContext(ht);
GetConn(); } //连接数据库
public Connection getConn() throws Exception
{
if(conn!=null) return conn;
javax.sql.DataSource ds = (javax.sql.DataSource) ctx.lookup ("myPool");
conn = ds.getConnection();
return conn;
}报如下错误：
javax.naming.NameNotFoundException: Unable to resolve myPool. Resolved: '' Unresolved:'myPool' ; remaining name '' at weblogic.rmi.internal.AbstractOutboundRequest.sendReceive(AbstractOutboundRequest.java:90) at weblogic.rmi.cluster.ReplicaAwareRemoteRef.invoke(ReplicaAwareRemoteRef.java:247) at weblogic.rmi.cluster.ReplicaAwareRemoteRef.invoke(ReplicaAwareRemoteRef.java:225) at weblogic.jndi.internal.ServerNamingNode_WLStub.lookup(ServerNamingNode_WLStub.java:121) at weblogic.jndi.internal.WLContextImpl.lookup(WLContextImpl.java:323) at javax.naming.InitialContext.lookup(InitialContext.java:350) at Dataconn.Dataconn.getConn(Dataconn.java:57) at Dataconn.Dataconn.selectSql(Dataconn.java:66) at Dataconn.Applet1.paint(Applet1.java:20) at sun.awt.RepaintArea.paint(RepaintArea.java:298) at sun.awt.windows.WComponentPeer.handleEvent(WComponentPeer.java:199) at java.awt.Component.dispatchEventImpl(Component.java:2665) at java.awt.Container.dispatchEventImpl(Container.java:1216) at java.awt.Component.dispatchEvent(Component.java:2499) at java.awt.EventQueue.dispatchEvent(EventQueue.java:336) at java.awt.EventDispatchThread.pumpOneEventForHierarchy(EventDispatchThread.java:134) at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:101) at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:96) at java.awt.EventDispatchThread.run(EventDispatchThread.java:88)Exception occurred during event dispatching:java.lang.NullPointerException at Dataconn.Applet1.paint(Applet1.java:24) at sun.awt.RepaintArea.paint(RepaintArea.java:298) at sun.awt.windows.WComponentPeer.handleEvent(WComponentPeer.java:199) at java.awt.Component.dispatchEventImpl(Component.java:2665) at java.awt.Container.dispatchEventImpl(Container.java:1216) at java.awt.Component.dispatchEvent(Component.java:2499) at java.awt.EventQueue.dispatchEvent(EventQueue.java:336) at java.awt.EventDispatchThread.pumpOneEventForHierarchy(EventDispatchThread.java:134) at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:101) at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:96) at java.awt.EventDispatchThread.run(EventDispatchThread.java:88)麻烦了！
这样就可以了。
建议最好使用6.1,6.0的bug太多了！
java.sql.SQLException: weblogic.common.ResourceException: No resources available
没找到数据源，但我在config.xml里配置了啊，检查了url也没错，不过小酋长说要在console里配置data source，这应该跟在config.xml里配置没区别吧
2001-12-7 下午04时21分17秒> <Info> <ConnectionManager> <Bootstrap unable to get a direct: 'Protocol: 't3''connection to: '0S:127.0.0.1:[7001,-1,-1,-1,-1,-1,-1]' on port: '7001'java.rmi.ConnectException: Destination unreachable; nested exception is:
java.net.ConnectException: Connection refused: connectjava.net.ConnectException: Connection refused: connect at java.net.PlainSocketImpl.socketConnect(Native Method) at java.net.PlainSocketImpl.doConnect(PlainSocketImpl.java:323) at java.net.PlainSocketImpl.connectToAddress(PlainSocketImpl.java:136) at java.net.PlainSocketImpl.connect(PlainSocketImpl.java:123) at java.net.Socket.<init>(Socket.java:273) at java.net.Socket.<init>(Socket.java:127) at weblogic.rjvm.t3.T3JVMConnection.newSocket(T3JVMConnection.java:324) at weblogic.rjvm.t3.T3JVMConnection.newSocketWithRetry(T3JVMConnection.java:312) at weblogic.rjvm.t3.T3JVMConnection.connect(T3JVMConnection.java:74) at weblogic.rjvm.t3.T3JVMConnection.createConnection(T3JVMConnection.java:148) at weblogic.rjvm.Protocol.createConnection(Protocol.java:201) at weblogic.rjvm.ConnectionManager.findOrCreateConnection(ConnectionManager.java:1077) at weblogic.rjvm.ConnectionManager.bootstrap(ConnectionManager.java:365) at weblogic.rjvm.ConnectionManager.bootstrap(ConnectionManager.java:330) at weblogic.rjvm.RJVMManager.findOrCreateRemoteInternal(RJVMManager.java:228) at weblogic.rjvm.RJVMManager.findOrCreate(RJVMManager.java:188) at weblogic.rjvm.RJVMFinder.findOrCreateRemoteServer(RJVMFinder.java:180) at weblogic.rjvm.RJVMFinder.findOrCreate(RJVMFinder.java:149) at weblogic.rjvm.ServerURL.findOrCreateRJVM(ServerURL.java:207) at weblogic.jndi.WLInitialContextFactoryDelegate.getInitialContext(WLInitialContextFactoryDelegate.java:235) at weblogic.jndi.WLInitialContextFactoryDelegate.getInitialContext(WLInitialContextFactoryDelegate.java:176) at weblogic.jndi.WLInitialContextFactory.getInitialContext(WLInitialContextFactory.java:123) at javax.naming.spi.NamingManager.getInitialContext(NamingManager.java:668) at javax.naming.InitialContext.getDefaultInitCtx(InitialContext.java:246) at javax.naming.InitialContext.init(InitialContext.java:222) at javax.naming.InitialContext.<init>(InitialContext.java:198) at Dataconn.Dataconn.getConn(Dataconn.java:55) at Dataconn.Dataconn.selectSql(Dataconn.java:67) at Dataconn.Applet1.paint(Applet1.java:20) at sun.awt.RepaintArea.paint(RepaintArea.java:298) at sun.awt.windows.WComponentPeer.handleEvent(WComponentPeer.java:199) at java.awt.Component.dispatchEventImpl(Component.java:2665) at java.awt.Container.dispatchEventImpl(Container.java:1216) at java.awt.Component.dispatchEvent(Component.java:2499) at java.awt.EventQueue.dispatchEvent(EventQueue.java:336) at java.awt.EventDispatchThread.pumpOneEventForHierarchy(EventDispatchThread.java:134) at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:101) at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:96) at java.awt.EventDispatchThread.run(EventDispatchThread.java:88)> <2001-12-7 下午04时21分17秒> <Info> <ConnectionManager> <Bootstrap unable to get a routed: 'Protocol: 't3'' connection to: '0S:127.0.0.1:[7001,-1,-1,-1,-1,-1,-1]' on port: '7001'java.rmi.ConnectException: No available router to destination at weblogic.rjvm.ConnectionManager.findOrCreateRouter(ConnectionManager.java:1167) at weblogic.rjvm.ConnectionManager.bootstrap(ConnectionManager.java:378) at weblogic.rjvm.ConnectionManager.bootstrap(ConnectionManager.java:330) at weblogic.rjvm.RJVMManager.findOrCreateRemoteInternal(RJVMManager.java:228) at weblogic.rjvm.RJVMManager.findOrCreate(RJVMManager.java:188) at weblogic.rjvm.RJVMFinder.findOrCreateRemoteServer(RJVMFinder.java:180) at weblogic.rjvm.RJVMFinder.findOrCreate(RJVMFinder.java:149) at weblogic.rjvm.ServerURL.findOrCreateRJVM(ServerURL.java:207) at weblogic.jndi.WLInitialContextFactoryDelegate.getInitialContext(WLInitialContextFactoryDelegate.java:235) at weblogic.jndi.WLInitialContextFactoryDelegate.getInitialContext(WLInitialContextFactoryDelegate.java:176) at weblogic.jndi.WLInitialContextFactory.getInitialContext(WLInitialContextFactory.java:123) at javax.naming.spi.NamingManager.getInitialContext(NamingManager.java:668) at javax.naming.InitialContext.getDefaultInitCtx(InitialContext.java:246) at javax.naming.InitialContext.init(InitialContext.java:222) at javax.naming.InitialContext.<init>(InitialContext.java:198) at Dataconn.Dataconn.getConn(Dataconn.java:55) at Dataconn.Dataconn.selectSql(Dataconn.java:67) at Dataconn.Applet1.paint(Applet1.java:20) at sun.awt.RepaintArea.paint(RepaintArea.java:298) at sun.awt.windows.WComponentPeer.handleEvent(WComponentPeer.java:199) at java.awt.Component.dispatchEventImpl(Component.java:2665) at java.awt.Container.dispatchEventImpl(Container.java:1216) at java.awt.Component.dispatchEvent(Component.java:2499) at java.awt.EventQueue.dispatchEvent(EventQueue.java:336) at java.awt.EventDispatchThread.pumpOneEventForHierarchy(EventDispatchThread.java:134) at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:101) at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:96) at java.awt.EventDispatchThread.run(EventDispatchThread.java:88)> 出错信息......javax.naming.CommunicationException. Root exception is java.net.ConnectException: No server found at T3://localhost:7001 at weblogic.rjvm.RJVMFinder.findOrCreate(RJVMFinder.java:155) at weblogic.rjvm.ServerURL.findOrCreateRJVM(ServerURL.java:207) at weblogic.jndi.WLInitialContextFactoryDelegate.getInitialContext(WLInitialContextFactoryDelegate.java:235) at weblogic.jndi.WLInitialContextFactoryDelegate.getInitialContext(WLInitialContextFactoryDelegate.java:176) at weblogic.jndi.WLInitialContextFactory.getInitialContext(WLInitialContextFactory.java:123) at javax.naming.spi.NamingManager.getInitialContext(NamingManager.java:668) at javax.naming.InitialContext.getDefaultInitCtx(InitialContext.java:246) at javax.naming.InitialContext.init(InitialContext.java:222) at javax.naming.InitialContext.<init>(InitialContext.java:198) at Dataconn.Dataconn.getConn(Dataconn.java:55) at Dataconn.Dataconn.selectSql(Dataconn.java:67) at Dataconn.Applet1.paint(Applet1.java:20) at sun.awt.RepaintArea.paint(RepaintArea.java:298) at sun.awt.windows.WComponentPeer.handleEvent(WComponentPeer.java:199) at java.awt.Component.dispatchEventImpl(Component.java:2665) at java.awt.Container.dispatchEventImpl(Container.java:1216) at java.awt.Component.dispatchEvent(Component.java:2499) at java.awt.EventQueue.dispatchEvent(EventQueue.java:336) at java.awt.EventDispatchThread.pumpOneEventForHierarchy(EventDispatchThread.java:134) at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:101) at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:96) at java.awt.EventDispatchThread.run(EventDispatchThread.java:88)Exception occurred during event dispatching:java.lang.NullPointerException at Dataconn.Applet1.paint(Applet1.java:24) at sun.awt.RepaintArea.paint(RepaintArea.java:298) at sun.awt.windows.WComponentPeer.handleEvent(WComponentPeer.java:199) at java.awt.Component.dispatchEventImpl(Component.java:2665) at java.awt.Container.dispatchEventImpl(Container.java:1216) at java.awt.Component.dispatchEvent(Component.java:2499) at java.awt.EventQueue.dispatchEvent(EventQueue.java:336) at java.awt.EventDispatchThread.pumpOneEventForHierarchy(EventDispatchThread.java:134) at java.awt.EventDispatchThread.pumpEventsForHierarchy(EventDispatchThread.java:101) at java.awt.EventDispatchThread.pumpEvents(EventDispatchThread.java:96) at java.awt.EventDispatchThread.run(EventDispatchThread.java:88)