One disadvantage of automatic import of Java lang package.

When ever a new java class is added in java.lang package jdk people has to think one think in their mind. I have written one java class named com.myPack.Test if suppose the same class name is included in java.lang then that greatly affects all my programs.since java.lang is by default imported. i have to do lot of changes in my code.
Can this be avoided. Can i avoid the default import of java.lang package by any means.
Am i making sense.?

thanks jsalonen and pbrockway2
I understand but, Isn't it a Genuine requirement..?
I have written a class say com.myPack.Test
i am using this in some other package.
i am importing this by the below statement
import com.myPack.*;
this package is extensivly used in many a packages.
suppose in new JDK if the java.lang.TEST is written.
In this case, it is a gereat overhead for me. i have to do lot of code changes right?.
one solution can be replace all import com.myPack.* by
import com.myPack.Test; but isn't it a great rework. which afects widely in all the applications right?..
one other simple solution can be avoiding default import java.lang.* in certain packages alone, Isn't it?

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    #1.5 #000C296B3F6A000D0000001400000A3000EF90978C2E8C29#1183013784366#/System/Server/Services/Deploy##com.sap.engine.services.deploy#Administrator#4#####Thread[RMI/IIOP Worker [3],5,Dedicated_Application_Thread]##0#0#Error#1#com.sap.engine.services.deploy#Plain#Exception while validating application local/Dashboard.
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    The registered containers in this moment were [com.sap.security.ume, app_libraries_container, Cache Configuration Upload, servlet_jsp, dbcontentcontainer, connector, Cluster File System, JMSConnector, appclient, dbschemacontainer, orpersistence, JDBCConnector, EJBContainer, webservices_container, scheduler~container].
    Possible reasons :
         1.An AS Java service, which is providing a container, is stopped or not deployed.
         2.The containers, which processed it, are not implemented correct. They deployed or started initially the application, but didn't return deployed components in the application deployment info.###
    #1.5 #000C296B3F6A000D0000001700000A3000EF90978C2E8C29#1183013784366#/System/Server/Services/Deploy##com.sap.engine.services.deploy#Administrator#4#####Thread[RMI/IIOP Worker [3],5,Dedicated_Application_Thread]##0#0#Error#1#com.sap.engine.services.deploy#Plain#Exception in operation deploy with application local/Dashboard.###
    #1.5 #000C296B3F6A000D0000001B00000A3000EF90978C2E8C29#1183013784397#/System/Server##java.lang.Package#Administrator#4#####Thread[RMI/IIOP Worker [3],5,Dedicated_Application_Thread]##0#0#Error#1#java.lang.Package#Java#error.action.filter#com/sap/engine/services/mngt_model/localization.properties#Exception thrown by Action Filter: com.sap.engine.services.mngt_model.spi.ActionFilteringException: com.sap.engine.services.deploy.server.utils.DSRemoteException: Application local/Dashboard is not deployed..Action will not be delivered to domain: connector. Action is: APPLICATION_DEPLOYED#3#com.sap.engine.services.mngt_model.plugins.ApplicationActionFilter@d46ed0#connector#APPLICATION_DEPLOYED#
    #1.5 #000C296B3F6A000D0000001D00000A3000EF90978C2E8C29#1183013784397#/System/Server##java.lang.Package#Administrator#4#####Thread[RMI/IIOP Worker [3],5,Dedicated_Application_Thread]##0#0#Error#1#java.lang.Package#Java#error.action.filter#com/sap/engine/services/mngt_model/localization.properties#Exception thrown by Action Filter: com.sap.engine.services.mngt_model.spi.ActionFilteringException: com.sap.engine.services.deploy.server.utils.DSRemoteException: Application local/Dashboard is not deployed..Action will not be delivered to domain: servlet_jsp. Action is: APPLICATION_DEPLOYED#3#com.sap.engine.services.mngt_model.plugins.ApplicationActionFilter@d46ed0#servlet_jsp#APPLICATION_DEPLOYED#
    #1.5 #000C296B3F6A000D0000001F00000A3000EF90978C2E8C29#1183013784397#/System/Server##java.lang.Package#Administrator#4#####Thread[RMI/IIOP Worker [3],5,Dedicated_Application_Thread]##0#0#Error#1#java.lang.Package#Java#error.action.filter#com/sap/engine/services/mngt_model/localization.properties#Exception thrown by Action Filter: com.sap.engine.services.mngt_model.spi.ActionFilteringException: com.sap.engine.services.deploy.server.utils.DSRemoteException: Application local/Dashboard is not deployed..Action will not be delivered to domain: appclient. Action is: APPLICATION_DEPLOYED#3#com.sap.engine.services.mngt_model.plugins.ApplicationActionFilter@d46ed0#appclient#APPLICATION_DEPLOYED#
    #1.5 #000C296B3F6A000D0000002100000A3000EF90978C2E8C29#1183013784397#/System/Server##java.lang.Package#Administrator#4#####Thread[RMI/IIOP Worker [3],5,Dedicated_Application_Thread]##0#0#Error#1#java.lang.Package#Java#error.action.filter#com/sap/engine/services/mngt_model/localization.properties#Exception thrown by Action Filter: com.sap.engine.services.mngt_model.spi.ActionFilteringException: com.sap.engine.services.deploy.server.utils.DSRemoteException: Application local/Dashboard is not deployed..Action will not be delivered to domain: dbpool. Action is: APPLICATION_DEPLOYED#3#com.sap.engine.services.mngt_model.plugins.ApplicationActionFilter@d46ed0#dbpool#APPLICATION_DEPLOYED#
    #1.5 #000C296B3F6A000D0000002300000A3000EF90978C2E8C29#1183013784397#/System/Server##java.lang.Package#Administrator#4#####Thread[RMI/IIOP Worker [3],5,Dedicated_Application_Thread]##0#0#Error#1#java.lang.Package#Java#error.action.filter#com/sap/engine/services/mngt_model/localization.properties#Exception thrown by Action Filter: com.sap.engine.services.mngt_model.spi.ActionFilteringException: com.sap.engine.services.deploy.server.utils.DSRemoteException: Application local/Dashboard is not deployed..Action will not be delivered to domain: jmsconnector. Action is: APPLICATION_DEPLOYED#3#com.sap.engine.services.mngt_model.plugins.ApplicationActionFilter@d46ed0#jmsconnector#APPLICATION_DEPLOYED#
    #1.5 #000C296B3F6A000D0000002500000A3000EF90978C2E8C29#1183013784397#/System/Server/Services/Deploy##com.sap.engine.services.deploy#Administrator#4#####Thread[RMI/IIOP Worker [3],5,Dedicated_Application_Thread]##0#0#Error#1#com.sap.engine.services.deploy#Plain#Exception while validating application local/Dashboard.
    No one of the [] containers, which processed it, returned deployed component names.
    The registered containers in this moment were [com.sap.security.ume, app_libraries_container, Cache Configuration Upload, servlet_jsp, dbcontentcontainer, connector, Cluster File System, JMSConnector, appclient, dbschemacontainer, orpersistence, JDBCConnector, EJBContainer, webservices_container, scheduler~container].
    Possible reasons :
         1.An AS Java service, which is providing a container, is stopped or not deployed.
         2.The containers, which processed it, are not implemented correct. They deployed or started initially the application, but didn't return deployed components in the application deployment info.###
    #1.5 #000C296B3F6A000D0000002800000A3000EF90978C2E8C29#1183013784397#/System/Server/Deployment##com.sap.engine.services.tcxblxdeploy_controller#Administrator#4#####Thread[RMI/IIOP Worker [3],5,Dedicated_Application_Thread]##0#0#Error#1#com.sap.engine.services.tcxblxdeploy_controller#Plain#An error occurred while deploying the deployment item 'local_Dashboard'.###
    #1.5 #000C296B3F6A000D0000002B00000A3000EF90978C2E8C29#1183013784428#/System/Server/Deployment##com.sap.engine.services.tcxblxdeploy_controller#Administrator#4#####Thread[RMI/IIOP Worker [3],5,Dedicated_Application_Thread]##0#0#Info#1#com.sap.engine.services.tcxblxdeploy_controller#Plain###Unlocking the Deploy.#
    #1.5 #000C296B3F6A000D0000002C00000A3000EF90978C2E8C29#1183013784428#/System/Server/Deployment##com.sap.engine.services.tcxblxdeploy_controller#Administrator#4#####Thread[RMI/IIOP Worker [3],5,Dedicated_Application_Thread]##0#0#Error#1#com.sap.engine.services.tcxblxdeploy_controller#Plain#An error occurred while deploying the deployment item 'local_Dashboard'.; nested exception is:
         java.rmi.RemoteException:  class com.sap.engine.services.dc.gd.DeliveryException: An error occurred during deployment of sdu id: local_Dashboard
    sdu file path: C:\SAP\JP1\JC00\j2ee\cluster\server0\temp\tcbldeploy_controller\archives\14\Dashboard.ear
    version status: NEW
    deployment status: Admitted
    description:
              1. Error:
    Error occurred while deploying ear file C:\SAP\JP1\JC00\j2ee\cluster\server0\temp\tcbldeploy_controller\archives\14\Dashboard.ear.
    Reason: Exception while validating application local/Dashboard.
    No one of the [] containers, which processed it, returned deployed component names.
    The registered containers in this moment were [com.sap.security.ume, app_libraries_container, Cache Configuration Upload, servlet_jsp, dbcontentcontainer, connector, Cluster File System, JMSConnector, appclient, dbschemacontainer, orpersistence, JDBCConnector, EJBContainer, webservices_container, scheduler~container].
    Possible reasons :
         1.An AS Java service, which is providing a container, is stopped or not deployed.
         2.The containers, which processed it, are not implemented correct. They deployed or started initially the application, but didn't return deployed components in the application deployment info.
    . Cannot deploy it.; nested exception is:
         java.rmi.RemoteException:  class com.sap.engine.services.deploy.server.utils.DSRemoteException: Error occurred while deploying ear file C:\SAP\JP1\JC00\j2ee\cluster\server0\temp\tcbldeploy_controller\archives\14\Dashboard.ear.
    Reason: Exception while validating application local/Dashboard.
    No one of the [] containers, which processed it, returned deployed component names.
    The registered containers in this moment were [com.sap.security.ume, app_libraries_container, Cache Configuration Upload, servlet_jsp, dbcontentcontainer, connector, Cluster File System, JMSConnector, appclient, dbschemacontainer, orpersistence, JDBCConnector, EJBContainer, webservices_container, scheduler~container].
    Possible reasons :
         1.An AS Java service, which is providing a container, is stopped or not deployed.
         2.The containers, which processed it, are not implemented correct. They deployed or started initially the application, but didn't return deployed components in the application deployment info.###
    #1.5 #000C296B3F6A000D0000002F00000A3000EF90978C2E8C29#1183013784428#/System/Server/Deployment##com.sap.engine.services.tcxblxdeploy_controller#Administrator#4#####Thread[RMI/IIOP Worker [3],5,Dedicated_Application_Thread]##0#0#Info#1#com.sap.engine.services.tcxblxdeploy_controller#Plain###Deployment has finished#
    Thanks,
    MK

  • Problem with  java.lang.reflect in Eclipse

    I'm just reading java tutorial about that library, but when i'm trying to execute those example program's e.g
    import java.lang.reflect.Constructor;
    import java.lang.reflect.Type;
    import static java.lang.System.out;
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        public static void main(String... args) {
         try {
             Class<?> cArg = Class.forName(args[1]);
             Class<?> c = Class.forName(args[0]);
             Constructor[] allConstructors = c.getDeclaredConstructors();
             for (Constructor ctor : allConstructors) {
              Class<?>[] pType  = ctor.getParameterTypes();
              for (int i = 0; i < pType.length; i++) {
                  if (pType.equals(cArg)) {
                   out.format("%s%n", ctor.toGenericString());
                   Type[] gpType = ctor.getGenericParameterTypes();
                   for (int j = 0; j < gpType.length; j++) {
                   char ch = (pType[j].equals(cArg) ? '*' : ' ');
                   out.format("%7c%s[%d]: %s%n", ch,
                        "GenericParameterType", j, gpType[j]);
                   break;
    // production code should handle this exception more gracefully
         } catch (ClassNotFoundException x) {
         x.printStackTrace();
    in Eclipse i've got nothing in my output console :/
    no errors, no warnings, no text ..... (it was terminated correctly)
    Can somebody tell me what should I do to make it work properly ?                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                           

    Hi,
    In program arguments, you should not have ConstructorSift but only java.util.Formatter and java.util.Locale.
    (Eclipse : run dialog | arguments tab | program arguments)
    This is the output you should get:
    $ java ConstructorSift java.util.Formatter java.util.Locale
    public java.util.Formatter(java.util.Locale)
    *GenericParameterType[0]: class java.util.Locale
    public java.util.Formatter(java.lang.Appendable,java.util.Locale)
    GenericParameterType[0]: interface java.lang.Appendable
    *GenericParameterType[1]: class java.util.Locale
    public java.util.Formatter(java.lang.String,java.lang.String,java.util.Locale) throws java.io.FileNotFoundException,java.io.UnsupportedEncodingException
    GenericParameterType[0]: class java.lang.String
    GenericParameterType[1]: class java.lang.String
    *GenericParameterType[2]: class java.util.Locale
    public java.util.Formatter(java.io.File,java.lang.String,java.util.Locale) throws java.io.FileNotFoundException,java.io.UnsupportedEncodingException
    GenericParameterType[0]: class java.io.File
    GenericParameterType[1]: class java.lang.String
    *GenericParameterType[2]: class java.util.Locale
    public java.util.Formatter(java.io.OutputStream,java.lang.String,java.util.Locale) throws java.io.UnsupportedEncodingException
    GenericParameterType[0]: class java.io.OutputStream
    GenericParameterType[1]: class java.lang.String
    *GenericParameterType[2]: class java.util.Locale
    Hope that help,
    Jack

  • Java.lang.NoClassDefFoundError: oracle/jdbc/driver/OracleDriver

    When I run java servlet test_ora.java with IE6.0 I get the following error page:
    HTTP Status 500 -
    type Exception report
    message
    description The server encountered an internal error () that prevented it from fulfilling this request.
    exception
    javax.servlet.ServletException: Servlet execution threw an exception
         at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:269)
         at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:193)
         at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:260)
         at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:646)
         at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:483)
         at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
         at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
         at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:646)
         at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:483)
         at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
         at org.apache.catalina.core.StandardContext.invoke(StandardContext.java:2349)
         at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:180)
         at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:646)
         at org.apache.catalina.valves.ErrorDispatcherValve.invoke(ErrorDispatcherValve.java:170)
         at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:644)
         at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:171)
         at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:644)
         at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:483)
         at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
         at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:174)
         at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:646)
         at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:469)
         at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:644)
         at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:483)
         at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
         at org.apache.coyote.tomcat4.CoyoteAdapter.service(CoyoteAdapter.java:223)
         at org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:405)
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         at org.apache.tomcat.util.threads.ThreadPool$ControlRunnable.run(ThreadPool.java:518)
         at java.lang.Thread.run(Thread.java:536)
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         at test_ora.doGet(test_ora.java:21)
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         at javax.servlet.http.HttpServlet.service(HttpServlet.java:853)
         at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:247)
         at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:193)
         at org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:260)
         at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:646)
         at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:483)
         at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
         at org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:191)
         at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:646)
         at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:483)
         at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
         at org.apache.catalina.core.StandardContext.invoke(StandardContext.java:2349)
         at org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:180)
         at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:646)
         at org.apache.catalina.valves.ErrorDispatcherValve.invoke(ErrorDispatcherValve.java:170)
         at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:644)
         at org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:171)
         at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:644)
         at org.apache.catalina.core.StandardPipeline.invoke(StandardPipeline.java:483)
         at org.apache.catalina.core.ContainerBase.invoke(ContainerBase.java:995)
         at org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:174)
         at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:646)
         at org.apache.catalina.valves.AccessLogValve.invoke(AccessLogValve.java:469)
         at org.apache.catalina.core.StandardPipeline$StandardPipelineValveContext.invokeNext(StandardPipeline.java:644)
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  • How to have java.lang

    Hi guys
    when I download the package javacard development kit 2.2.1 from SUN, there's a file "api.jar" in it which can be used as Javacard API. Hence, it's quite easy for the applet developer to import this file into their applet and run this normally
    For my own sake, I now just want to have the package java.lang.* (it can be either a jar file or a folder of class files) --> How can I have it??
    P/S: I've tried to extract "api.jar" then wrapped the folder of java.lang + java.lang (export file) into a jar file (temporarily called lang.jar). However, this way didn't work out

    When I finish creating the javacard.framework, it's necessary to wrap it into a jar file (library file) and import it into normal applets, hence the applet can run normally and invoke methods from javacard.framework.
    However, when I do so, there's always a problem of missing java.lang. * (a java.lang package for javacard only).
    P/S: I've tried to extract "api.jar" then wrapped the folder of java.lang + java.lang (export file) into a jar file (temporarily called lang.jar). However, this way didn't work outWell, honestly, by this way, I made it. Finally, I built a jar file of java.lang and can put it into java card applet project
    I did it as below:
    (IDE - Netbean 6.9.1)
    1. Create a java card classic library project named com.sun.java.impl (this package is used in the future; it contains some classes which will be called by methods in javacard.framework)
    2. Fulfill the code for those classes in this class
    3. Build this class --> we have expt file and class file of all classes of this package -->wrap them into a jar file (let's call it impl.jar)
    4. Extract api.jar from Java Card Development Kit 2.2.1 (provided by SUN) --> retrieve the package java.lang (including class files such as Object.class, NullPointerException.class,... and export file of this package) --> wrap them into a jar file (let's call it javalang.jar)
    5. Create a javacard extension library project named javacard.framework
    6. Fulfill the code for those classes in this class (import impl.jar and javalang.rar as library for this package)
    7. Build this package (javacard.framework) ~~> we have a jar file (let's call it api.jar) and class files, but export file ~~> when importing this jar to an applet project, an error (missing of expt file) is sprung
    ========> I do not know why there is no expt file being created during the build of javacard.framework. Is it because the difference of Classic and Extension Project
    Remember I tried to build javacard.framework within Classic project, but failed

  • Java.lang.SecurityException: Security violation, expect: 514, actual: 0

    [import] Connect to http://bi-internal.oracleoutsourcing.com/xmlpserver using *****
    [import] Import "****.xdo" from "****" to "****.xdo"
    Command Error: import->importObject
    java.lang.SecurityException: Security violation: ****.xdo, user: ****, expect: 514, actual: 0
    Done.
    How do I debug this further? If I re-run several times it eventually starts working.
    Edited by: mcarter on May 24, 2013 9:30 AM

    Exactly the file output file is binary. Do a vi on it, you'll see what I mean. To push this through our patching system it needs to be in it's xml format like in the BICatalogUtil.sh. To my understanding that archive is a compressed archive of the xml files (stored like the backend). I need to figure out how to uncompress so it can feed through our patching system.
    Would be better if we could just get the BICatalogUtil.sh error resolved as that method does work (most of the time).

  • Code compiles - throws java.lang.NullPointerException

    This program is intended to build an array and populate it with inventory, then print out the inventory line item by line item. The code compiles but throws the NullPointerException error when the program is run. Here is the main method with 2 classes, as well as the text from the error and a pointer to the specific place in the code the error is from...
    main method
    import java.util.Scanner;
    import static java.lang.System.out;
    import java.io.*;
    public class Inventory1
        private static void Exit() //set ability for program to exit on each loop
        { out.println("We hope this inventory program was " +
                           "helpful. Thank you for using our program.");
          System.exit(0);
      public static void main (String [] args)
          boolean validNumber;
          boolean validCount;
          boolean validDollars;
          //initialize scanner
      Scanner sc = new Scanner(System.in);        
      Music info = new Music();
      //declare and initialize variables
      int[] itemNumber = new int [5];
      String[] productName = new String[5];
      int[] stockAmount = new int[5];
      double[] productCost = new double[5];
      double[] totalValue = new double[5];
      while (true)
          for (int i=0; i<5; i++)
            out.println( "Enter CD name/description or 'exit' to stop the" +
                    " program: "); //prompt - product name
               info.productName[i] = sc.next(); // input
               if (info.productName.equalsIgnoreCase("exit"))
    out.println("Exit entered. ");
    Exit();
    else
    do
    out.println("Please enter CD number: "); //prompt - item number
    info.itemNumber[i] = sc.nextInt();
    validNumber = true;
    if( (info.itemNumber[i] <1 ) )
    {//make sure product number is positive number
    validNumber = false;
    out.println("All CDs have positive numbers and no other " +
    "characters. Please enter a valid CD number.");
    }while (!validNumber);
    do
    out.println("Quantity in stock: "); // prompt - quantity
    info.stockAmount [i] = (sc.nextInt()); // capture temp number to verify
    validCount = true;
    if(( info.stockAmount[i] <1 ))
    { // ensure stock amount is positive number
    validCount = false;
    out.println( "Inventory numbers must be positive. Please " +
    "enter a correct value." ); // prompt for correct #
    } while (!validCount);
    do
    out.println("What is the product cost for each unit? "); // prompt - cost
    info.productCost[i] = sc.nextDouble();
    validDollars = true;
    if (( info.productCost[i] <1 ))
    validDollars = false;
    out.println( "Product cost must be a positive dollar " +
    "amount. Please enter correct product cost." );
    } while (!validDollars);
    out.println(totalValue);
    @Override
    public String toString()
    return super.toString();
    Music classclass Music
    String productName[];
    String title;
    int itemNumber[];
    int item;
    int stockAmount[];
    int amount;
    double productCost[];
    double cost;
    double totalValue[];
    double value;
    int i;
    public Music(String title, int item, int amount, double cost, double value,
    int i)
    this.productName[i] = title;
    this.itemNumber[i] = item;
    this.stockAmount[i] = amount;
    this.productCost[i] = cost;
    this.totalValue[i] = value;
    public Music()
    public void setTotalValue(double[] totalValue)
    this.totalValue = totalValue;
    public double[] getTotalValue()
    return totalValue;
    public void setStockAmount(int[] stockAmount)
    this.stockAmount = stockAmount;
    public int[] getStockAmount()
    return stockAmount;
    public void setProductCost(double[] productCost)
    this.productCost = productCost;
    public double[] getProductCost()
    return productCost;
    public void setProductName(String[] productName)
    this.productName = productName;
    public String[] getProductName()
    return productName;
    public void setItemNumber (int[] itemNumber)
    this.itemNumber = itemNumber;
    public int[] getItemNumber()
    return itemNumber;
    }TotalInventory classclass TotalInventory
    double TotalInfo;
    public int [] getStockAmount(int[] units)
    int[] stockAmount = units;
    return units;
    public double[] getTotalValue(double[] cost)
    double[] productCost = cost;
    return cost;
    error message
    init:
    deps-jar:
    Compiling 1 source file to C:\Documents and Settings\Tammy\My Documents\School\JavaProgramming\Inventory\build\classes
    compile:
    run:
    Enter CD name/description or 'exit' to stop the program:
    here we go
    Exception in thread "main" java.lang.NullPointerException
            at Inventory1.main(Inventory1.java:54)
    Java Result: 1
    BUILD SUCCESSFUL (total time: 4 seconds)
    Inventory1.main(Inventory1.java:54) is this line of code in the main method: info.productName[i] = sc.next(); // input Any suggestions?                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                                       

    I have not changed my code from when I supplied it in the first post - I am simply pointing out that I already initiated the String with 5 as the number...I've supplied you with everything I am getting. The three modules are in the original post, as is the error message being received - nothing has changed.
    This means with the code posted in my original question I am getting an NPE. I compile the code and run it. I'm able to input the "title" (productName) after the prompt but then get the NPE. I'm not trying to make you read my mind, I'm just asking for help and make every effort to provide as much detail as possible to make that easier on all of us.

  • Unable to locate java.lang

    Hello,
    Could anyone tell me why when runnig the batch file I get the following error:
    unable to locate java.lang package
    I have set up the envionment variables as follows:
    CLASSPATH=c:\j2sdk1.4.2_14\lib
    PATH=c:\j2sdk1.4.2_14\bin
    I would highly appreciate any help. I would like to get this simulator up and running
    and do some work over the easter holidays (nice uh?), it could always be worst! :)
    contents of batch file
    Set SNAP_PATH=C:\TaylecSim\classes\TaylecSim.jar
    Set SRC=Mo
    javac -bootclasspath %SNAP_PATH%\classes %SRC%.java
    %SNAP_PATH%\bin\preverify -classpath %SNAP_PATH%\classes;. -nofinalize -d ReadyToGo %SRC%
    pause
    MS-DOS output
    C:\Simulator\Installation\DevFiles>Set SNAP_PATH=C:\TaylecSim\classes\TaylecSim.
    jar
    C:\Simulator\Installation\DevFiles>Set SRC=Mo
    C:\Simulator\Installation\DevFiles>javac -bootclasspath C:\TaylecSim\classes\Tay
    lecSim.jar\classes Mo.java
    Fatal Error: Unable to locate package java.lang in classpath or bootclasspath
    C:\Simulator\Installation\DevFiles>C:\TaylecSim\classes\TaylecSim.jar\bin\prever
    ify -classpath C:\TaylecSim\classes\TaylecSim.jar\classes;. -nofinalize -d Ready
    ToGo Mo
    The system cannot find the path specified.
    C:\Simulator\Installation\DevFiles>pause
    Press any key to continue . . .

    C:\Simulator\Installation\DevFiles>javac -bootclasspath C:\TaylecSim\classes\Tay
    lecSim.jar\classes Mo.java
    Fatal Error: Unable to locate package java.lang in classpath or bootclasspath
    Why are you replacing (as opposed to possibly adding to) Java's standard classes? You are not providing access to the Java boot classes, as the error message is telling you.

  • Java.math package does not exist!!!

    hi java experts, i really desperately need some help. ihave been trying to compile a java program i have written that imports the java.math package as i am using the BigInteger class. I am using SUN ONE STUDIO ME 4 and have j2se SDk installed. when i try to build the program in the IDE, it gives me an error message saying the java.math package does not exist. i can't understand why. i think it's an IDE problem. i tried mounting the filesystem and i mounted almost a million times in diff ways but it still can't compile. i can't find the directory of the java.math to mount into. anyway i tried to compile it at the command prompt and it can compile but with errors... so i figure that i do have the java.math class on my system just that the IDE jsut can't recognise it. i am at my wits end and gonna go mad if someone doesn't please help me.
    adeline from singapore

    Cross-posted at http://forum.java.sun.com/thread.jsp?thread=293132&forum=54&message=1155073

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