谁能教我该怎么看java报的错误信息？

我在学习java使用时，常常看到各种错误信息，一次就弹出很多行，但是对于具体意思不太明白，请教谁能告诉我个代表什么意思？例如：
javax.naming.NameNotFoundException: HelloWorldEJB not bound
at org.jnp.server.NamingServer.getBinding(NamingServer.java:490)
at org.jnp.server.NamingServer.getBinding(NamingServer.java:498)
at org.jnp.server.NamingServer.getObject(NamingServer.java:504)
at org.jnp.server.NamingServer.lookup(NamingServer.java:277)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:324)
at sun.rmi.server.UnicastServerRef.dispatch(UnicastServerRef.java:261)
at sun.rmi.transport.Transport$1.run(Transport.java:148)
at java.security.AccessController.doPrivileged(Native Method)
at sun.rmi.transport.Transport.serviceCall(Transport.java:144)
at sun.rmi.transport.tcp.TCPTransport.handleMessages(TCPTransport.java:460)
at sun.rmi.transport.tcp.TCPTransport$ConnectionHandler.run(TCPTransport.java:701)
at java.lang.Thread.run(Thread.java:534)
at sun.rmi.transport.StreamRemoteCall.exceptionReceivedFromServer(Unknown Source)
at sun.rmi.transport.StreamRemoteCall.executeCall(Unknown Source)
at sun.rmi.server.UnicastRef.invoke(Unknown Source)
at org.jnp.server.NamingServer_Stub.lookup(Unknown Source)
at org.jnp.interfaces.NamingContext.lookup(NamingContext.java:530)
at org.jnp.interfaces.NamingContext.lookup(NamingContext.java:509)
at javax.naming.InitialContext.lookup(Unknown Source)
at com.test.HelloWorldClient.getHome(HelloWorldClient.java:25)
at com.test.HelloWorldClient.testBean(HelloWorldClient.java:47)
at com.test.HelloWorldClient.main(HelloWorldClient.java:64)
Picked up _JAVA_OPTIONS: -Dawt.toolkit=mercury.awt.awtSW -Xrunmicsupp -Xbootclasspath/a:C:\PROGRA~1\COMMON~1\MERCUR~1\SHARED~1\JAVAAD~1\classes;C:\PROGRA~1\COMMON~1\MERCUR~1\SHARED~1\JAVAAD~1\classes\mic.jar