Compile error import java.util.map$entry

Hi,
I am trying to compile code which imports the following package
import java.util.Map$Entry.
The error thrown up is : cant resolve symbol Map$Entry. Why is there a $ in the package import path and is there some configuration required to compile the file.
I am not allowed to change the code. Does anyone have an idea on how this problem can be solved.
Thanks and regards
Kumar Vellal

Btw java docs for the interface are available at:
http://java.sun.com/j2se/1.4.2/docs/api/java/util/Map.Entry.html
Changing the import should probably help compile the code, but without changing the import .. need to check. This is just from what i remember now. Lets see if anyone else comments on this.

Similar Messages

Compile errors importing Map$Entry

Hi,
I trying to compile code written by my client which uses the following syntax
import java.util.Map$Entry.
This throws a compilation error :
cant resolve symbol class Map$Entry
package : java.util
The same compile at the client side works. Am i missing some configuration. Also why is the path defined as Map$Entry instead of Map.Entry.
any help would be greatly appreciated
thanks and regrads
Kumar Vellal

What you're client is trying to do is import a nested class. To do this you use the syntax:
import A.Enclosing.Nested;Now you can refer to the nested class without refering to the enclosing class (i.e Nested n = new Nested();)
However - Some compilers don't like this, and I don't like it. You shouldn't import nested classes directly like this.

Weird exception: Cannot instantiate non-persistent class: java.util.Map

java.lang.UnsupportedOperationException: Cannot instantiate non-persistent class: java.util.Map
     at com.sleepycat.persist.impl.NonPersistentFormat.newInstance(NonPersistentFormat.java:45)
     at com.sleepycat.persist.impl.PersistEntityBinding.readEntity(PersistEntityBinding.java:89)
     at com.sleepycat.persist.impl.PersistEntityBinding.entryToObject(PersistEntityBinding.java:61)
     at com.sleepycat.persist.PrimaryIndex.put(PrimaryIndex.java:338)
     at com.sleepycat.persist.PrimaryIndex.put(PrimaryIndex.java:299)
     at com.xx.support.dbd.IdentityDataAccessor.insert(IdentityDataAccessor.java:33)
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     at junit.framework.TestResult.runProtected(TestResult.java:124)
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What's the root cause of this exception?

I wrote a small test using the classes you included
in your message and I am able to retrieve the user by
key, as in the code above. So I'm not sure what
you're doing that is causing the problem. Please
send a small test that reproduces the problem.Oops, I forgot to include the source for the test I wrote. Here it is.
import java.io.File;
import java.util.HashMap;
import java.util.Map;
import com.sleepycat.je.DatabaseException;
import com.sleepycat.je.Environment;
import com.sleepycat.je.EnvironmentConfig;
import com.sleepycat.persist.EntityStore;
import com.sleepycat.persist.PrimaryIndex;
import com.sleepycat.persist.StoreConfig;
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import com.sleepycat.persist.model.Persistent;
import com.sleepycat.persist.model.PrimaryKey;
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        protected String name;
        public SimplePrincipal(String username) {
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        public SimplePrincipal() {}
    @Entity
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        @PrimaryKey
        private String key;
        private Map properties;
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            super();
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            super(username);
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        public void setKey(String key){
            this.key = key;
        public void addPropertity(String name, String value) {
            this.properties.put(name, value);
        @Override
        public String toString() {
            return "[SimpleUser key: " + key + " name: " + name + ']';
    private Environment env;
    private EntityStore store;
    private PrimaryIndex<String, SimpleUser> primaryIndex;
    private void open()
        throws DatabaseException {
        EnvironmentConfig envConfig = new EnvironmentConfig();
        envConfig.setAllowCreate(true);
        envConfig.setTransactional(true);
        env = new Environment(new File("./data"), envConfig);
        StoreConfig storeConfig = new StoreConfig();
        storeConfig.setAllowCreate(true);
        storeConfig.setTransactional(true);
        store = new EntityStore(env, "test", storeConfig);
        primaryIndex = store.getPrimaryIndex(String.class, SimpleUser.class);
    private void close()
        throws DatabaseException {
        store.close();
        env.close();
    private void execute()
        throws DatabaseException {
        SimpleUser user = new SimpleUser("test");
        user.setKey("testkey");
        primaryIndex.put(user);
        user = primaryIndex.get("testkey");
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        throws DatabaseException {
        Test test = new Test();
        test.open();
        test.execute();
        test.close();
}Mark

Error(7): java.util.zip.ZipException: invalid entry size (expected 813 but

Hi All,
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Today I opened my working project in Jdeveloper 10.1.3 version and as I compile the project, it gives me this error in all Jsf - Jsp pages.
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<%@ taglib uri="http://java.sun.com/jsf/html" prefix="h"%>
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thanks,
pp

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Error(5): java.util.zip.ZipException: invalid entry size (expected 2875 but

Hi all!
I'm getting this error when I try to execute my application in JDeveloper: Error(5): java.util.zip.ZipException: invalid entry size (expected 2875 but got 2845 bytes)
This started to happen after I had checkout my application to CVSNT.
Any help?
P.S. I'm using JDeveloper 10.1.3 with CVSNT 2.5

My cvswrappers file (CVSNT):
*.cab -kb
*.class -kb
*.doc -kb
*.dll -kb
*.ear -kb
*.exe -kb
*.exp -kb
*.fla -kb
*.gif -kb
*.gz -kb
*.jar -kb
*.jpg -kb
*.jpeg -kb
*.lib -kb
*.msi -kb
*.mso -kb
*.pdf -kb
*.pfw -kb
*.png -kb
*.ppt -kb
*.sit -kb
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*.tar -kb
*.tlb -kb
*.vsd -kb
*.xls -kb
*.war -kb
*.wmz -kb
*.zip -kb Via Tortoise client I can add and commit zip (jar) files in binary format and everything is OK.
If I do that via Jdev, anybody who checkout that module from cvs have zip exception, because JDev didnt sent in binary format. How to setup that?
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Message was edited by:
vpetreski

Error: java.util.map can not be inherited with different arguments

Hi,
I am getting following error while building the source code.
C:\venus\src\com\martquest\messaging\msgio\MqMessageIOObjectCarrier.java:36: java.util.Map cannot be inherited with different arguments: <> and <java.lang.Object,java.lang.Object>
[javac] public class MqMessageIOObjectCarrier extends Properties implements IMqMessageIOObjectCarrier
What should I do to resolve this issue?
Thanks
Prachi

Hi,
I am getting following error while building the
source code.whose source code? If it's yours, you'd better look at where you are defining and using Map. The error code tells you exactly what's wrong.

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I have installed OIM 9100 on BEA with an Oracle Database.
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/M

Error when importing java.util.Scanner

Agh! I'm in an introduction to computer science course, and I am writing a program as an assignment that's due tomorrow.
I have imported java.util.Scanner before, but I've only run it on the Windows PCs in the lab, whereas I am currently on a Mac. I've updated to the latest version of Java (through the software update), and I'm running Tiger (also fully updated).
I'm using Dr. Java to write the programs, but I tried using the very same thing in Eclipse and it didn't work. Here's my program:
import java.util.Random;
import java.util.Scanner;
public class Password {
public static void main(String[] args) {
//create a Scanner object to read from the keyboard:
String password;
Scanner scanner = new Scanner(System.in);
Random randomizer = new Random();
System.out.println("Please enter a string containing candidate characters.");
String input = scanner.next();
int charLength = length(input);
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System.out.print(input.substring(randomizer.nextInt(charLength)));
System.out.print(input.substring(randomizer.nextInt(charLength)));
System.out.println(input.substring(randomizer.nextInt(charLength)));
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4 errors found:
File: /Users/brianmoore/Desktop/Password.java [line: 11]
Error: cannot resolve symbol
symbol : class Scanner
location: package util
File: /Users/brianmoore/Desktop/Password.java [line: 18]
Error: cannot resolve symbol
symbol : class Scanner
location: class Password
File: /Users/brianmoore/Desktop/Password.java [line: 18]
Error: cannot resolve symbol
symbol : class Scanner
location: class Password
File: /Users/brianmoore/Desktop/Password.java [line: 22]
Error: cannot resolve symbol
symbol : method length (java.lang.String)
location: class Password
Any ideas?

Ok. I figured it out. On the Dr. Java page, this is what helped me:
Please verify the following:
- Open "/Applications/Utilities/Java/J2SE 5.0/Java
Preferences";
make sure "J2SE 5.0" is at the top of the list under
"Java
Application Runtime"
- Open DrJava; go to Edit->Preferences; make sure
"Tools.jar
Location", "JSR-14 Location", and "JSR-14
Collections Path"
are all blank
- Open the Help->About dialog box; make sure the "DrJava
Version" listed is 20050601-0007 or later (that is, later
than
June 1, 2005)
- Go to the "System Properties" tab in the
"About" box; make
sure "java.version" is 1.4.2.
Let us know what you find out if you're still having
trouble.
Thanks for your help!

Import java.util Error

How come program wont accept import java.util ?
I get cannot resole symbol ?? i looked in up in my java book and its spelled right . what gives ?

there is no class named java.util .
import java.util.ArrayList;
import java.util.EventObject;
or
import java.util.*;

Cannot import java.util.concurrent.locks ... WHY?

Why is Xcode unable to find the java.util.concurrent.locks package. The class browser knows it exists. For example the entry for the ReentrantLock class looks like this in the browser class window:
ReentrantLock (java.util.concurrent.locks)
Xcode knows about other java.util packages such as java.util.ResourceBundle which I have been accessed successfully in other parts of my projecgt.
Here is a source file and the resulting compiler error:
The source file:
// Foo.java
import java.util.ResourceBundle;
import java.util.concurrent.locks;
public class Foo { }
The compiler error:
compile:
Compiling 2 source files to /Users/Terry/Desktop/JAVA/PROJECTS/Logic/bin
/Users/Terry/Desktop/JAVA/PROJECTS/Logic/src/Foo.java:3: cannot find symbol
symbol : class locks
location: package java.util.concurrent
import java.util.concurrent.locks;
^
1 error
BUILD FAILED
Help or hints would be greatly appreciated!

Well the reason to your problem is very simple... java.util.concurrent.locks is a package... Not a class.
if you want to import a specific class, the class should be written at the end like you did for import java.util.ResourceBundle; but if you want to import a whole package you need to add the little star at the end :
import java.util.concurrent.locks.*;
Or else, you only import the class you need :
import java.util.concurrent.locks.ReentrantLock;

Compilation error in java for struts application.

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I'm a newbie in java and struts, i was trying a simple struts application given in "struts complete reference".This is my code of its Controller class(Action class):-
package com.jamesholmes.struts;
import java.util.ArrayList;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.apache.struts.action.Action;
import org.apache.struts.action.ActionForm;
import org.apache.struts.action.ActionForward;
import org.apache.struts.action.ActionMapping;
public final class SearchAction extends Action
public ActionForward execute(ActionMapping mapping, ActionForm form, HttpServletRequest request, HttpServletResponse response)
throws Exception
EmployeeSearchService service = new EmployeeSearchService();
ArrayList results;
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//Perform employee search based on what criteria was entered.
String name = searchForm.getName();
if(name != null && name.trim().length() > 0)
results = service.searchByName(name);
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//place search results in SearchForm for access by jsp.
searchForm.setResults(results);
//Forward control to this Action's input page.
return mapping.getInputForward();
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Tht problem is solved, it was a mistake frm my side in compilation precedure.Anyway, now the real error-After i compiled and created the war file of application, i was running it in tomcat and got this Error, it is i guess a server sprcific error which i am unable to understand., can any one now help me solving this out?????Error is this :-
HTTP Status 500 -
type Exception report
message
description The server encountered an internal error () that prevented it from fulfilling this request.
exception
org.apache.jasper.JasperException
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     org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:292)
     org.apache.jasper.servlet.JspServlet.service(JspServlet.java:236)
     javax.servlet.http.HttpServlet.service(HttpServlet.java:802)
root cause
java.lang.NullPointerException
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Apache Tomcat/5.0.27

The import "java.util.scanner" is not vaild

I am experiment with the java.util.scanner API after compiling the code below I received the following error:
The import "java.util.Scanner" is not valid, since it does not name a type in a package.
I declared a string variable should that suffice?
import java.util.Scanner;
public class Echo {
public static void main (String[] args)
String message;
Scanner scan = new Scanner (System.in);
System.out.println ("enter something:");
message = scan.nextLine();
System.out.println ("hey you entered: \"" + message + "\"");
}

Most IDEs let you select and installed JDK for them to use. Check out that IDE's preferences.
Otherwise, start here and learn to do it with a simple text editor or programmer's editor, and the command line.
http://java.sun.com/docs/books/tutorial/getStarted/cupojava/

When included import java.util.* then why include import java.util.Gregori

Hi,
In my program I hava inported the java package like
import java.util.*;
import java.sql.*;
import java.text.*;
then for using some classes like Gregorial calender,Date etc,I have to again import
import java.util.Date;
import java.sql.PreparedStatement;
import java.util.GregorianCalendar;
As far as I know if I have import the above like
import java.util.*; then it means I can use any classes in java.util ,but if I am not importing
import java.util.GregorianCalendar;
import java.util.Date;
my program is giving error.Can somebody tell me,where my concept is wrong.
Thanks

import java.sql.*;
import java.util.*;
//import java.util.Date; // <-- needed to avoid "the type Date is ambiguous"
public class PackageEg {
public static void main(String[] args) {
Date test = new Date();
}This code gives an error when I compile it, but if I include the
java.util.Date import it is good. The reason is that there are two
possible Date classes - one in java.util and one in java.sql. The
compiler cannot figure out which one I mean.
If I include a specific class like java.util.Date, then this one will be used
in preference to any .* imports. (These are called "imports on demand")
This explains why you need java.util.Date, but the other two are a
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My first time to write a very simple Java progam. Any one could help me on this comipling error? Thanks in advance!
Compiling ERROR:
================
C:\java\class>javac hw01.java
hw01.java:43: cannot resolve symbol
symbol : variable in
location: class hw01
while((line = in.readLine()) != null ) {
^
1 error
SOURCE CODE:
============
*     Program name: hw01.java
*     Author:
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*     Date: 12/08/2002
*     compile: javac hw01.java
*     usage: java hw01 <infile> <utfile>
*     <infile> - input file
*     operator operand1 operand2
*          ex. + 1 1
* <outfile> - output file
* operand1 operator operand2 = result
*          ex. 1 + 1 = 2
import java.io.*;
import java.util.*;
public class hw01 {
     // Open input file and output file
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               FileReader in = new FileReader(inFile);
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          String line = null;
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               //String op; String op1; String op2; String result;
               // Get operation and operands
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               //op = t.nextToken().charAt(0);
               //op1 = Integer.valueOf(t.nextToken()).intValue();
               //op2 = Integer.valueOf(t.nextToken()).intValue();
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               //if( op == '+' ) {
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               //     result = op1 - op2;
               //} else if( op == '*' ) {
               //     result = op1 * op2;
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The compiling error is fixed. The revised working source code hw01.java is provided below. Can someone help the remining question below?
PROBLEM/Question:
=================
The output only goes to the console. How code should be changed to allow output to a specified file from command line.
SOURCE FILE (without Compiling error):
=====================================
*     Program name: hw01.java
*     Author:
*     Description: Simple I/O and computation
*     Date: 12/08/2002
*     compile: javac hw01.java
*     usage: java hw01 <infile> <utfile>
* example: java hw01 hw1data.txt hw1out.txt
*     <infile> - input file
*     operator operand1 operand2
*          ex. + 1 1
* <outfile> - output file
* operand1 operator operand2 = result
*          ex. 1 + 1 = 2
import java.io.*;
import java.util.*;
public class hw01 {
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     public static void main(String[] args) throws IOException {
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          BufferedReader br = null;
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               File inFile = new File(args[0]);
               in = new FileReader(inFile);
               br = new BufferedReader(in);
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               File outFile = new File(args[1]);
               out = new FileWriter(outFile);
          } else {
               System.out.println("java command <arg1> <arg2>");
          // Get operation and operands for each line
          String line = null;
     char op;
          int op1, op2;
          int result = 0;
          while((line = br.readLine()) != null ) {
               // Get operation and operands
               StringTokenizer t = new StringTokenizer(line);
               op = t.nextToken().charAt(0);
               op1 = Integer.valueOf(t.nextToken()).intValue();
               op2 = Integer.valueOf(t.nextToken()).intValue();
               // Compute math operation and print result
               if( op == '+' ) {
                    result = op1 + op2;
                    System.out.println(op1 + " + " + op2 + " = " + result);
               } else if( op == '-' ) {
                    result = op1 - op2;
                    System.out.println(op1 + " - " + op2 + " = " + result);
               } else if( op == '*' ) {
                    result = op1 * op2;
                    System.out.println(op1 + " * " + op2 + " = " + result);
               } else if( op == '/' ) {
                    result = op1 / op2;
                    System.out.println(op1 + " / " + op2 + " = " + result);
          // Close infile
          in.close();
          // Close outFile
          out.close();
}

Error on java.util.NoSuchElementException

Hi,
I am facing an error "Exception in thread "main" java.util.NoSuchElementException" on my java code but i have no idea on how to solve this error. I have been figuring for very long but still no solution. Below is my code. Can anyone help? Thank in advance=D
import java.io.FileReader;
import java.io.BufferedReader;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.util.*;
class Matrix {
      double[][] element;
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        BufferedReader br = null;
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        Matrix m1 = new Matrix();
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                 m1.element = new double[numRows][numCols];
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                             m1.element [r][c] = Double.parseDouble(record);
                  br.close();
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}

Tave wrote:
Some things occur to me, none of which may be useful.
Firstly, you have no constructor for your class.
Secondly, you don't seem to have a main method, though this may be because this class is called by another.
Thirdly, don't you have a line number or other identification for what is causing the exception?Thank for your reply=D
Yap this is a class that is called by another class that why there is no main method for it. And for the line that causing the error is
String record = st3.nextToken(" ");

Compile error import java.util.map$entry

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