It means the file has been modified as compared to the version in your source control repository.

 I&#39;ve been following the getting started tutorial, but am stuck after I imported the playn project using Maven.  I am using Eclipse Indigo running on 64bit Windows 7.

  All the imported projects have the same error:

    Missing Artifact com.sun:tools:jar in all the pom.xml files.

After a couple hours of searching forums I have tried:

Installing the latest Java 1.6.029
Changing my `JAVA_HOME` environment variable to point to `\program files\Java\jdk1.6_029`
Changing my Eclipse Java preferences to use the JRE `jdk1.6_029`.

 I would really like to experiment with playn, but why there are a few posts I can&#39;t seem to find a consenus answer on the solution.   Some people say Sun removed something from the 64bit jdk, others say you must edit your xml files, many people have said you have change your `JAVA_HOME`, and another said you have to change your VM options for Eclipse.

  Any help on clearing this up would be appreciated, and possibly useful for many, since I do not have a particularly odd setup here.

(edit)
Here is the pom.xml in the first project.  Eclipse flags error in the line which says:

&lt;!-- language: lang-xml --&gt;

    &lt;project xmlns=&quot;http://maven.apache.org/POM/4.0.0&quot; xmlns:xsi=&quot;http://www.w3.org/2001/XMLSchema-instance&quot; xsi:schemaLocation=&quot;http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd&quot;&gt;
      &lt;modelVersion&gt;4.0.0&lt;/modelVersion&gt;
    
      &lt;parent&gt;
        &lt;groupId&gt;com.googlecode.playn&lt;/groupId&gt;
        &lt;artifactId&gt;playn-project&lt;/artifactId&gt;
        &lt;version&gt;1.1-SNAPSHOT&lt;/version&gt;
      &lt;/parent&gt;
    
      &lt;artifactId&gt;playn-android&lt;/artifactId&gt;
      &lt;name&gt;PlayN Android&lt;/name&gt;
      &lt;packaging&gt;jar&lt;/packaging&gt;
    
      &lt;repositories&gt;
      &lt;/repositories&gt;
    
      &lt;dependencies&gt;
        &lt;dependency&gt;
          &lt;groupId&gt;com.googlecode.playn&lt;/groupId&gt;
          &lt;artifactId&gt;playn-core&lt;/artifactId&gt;
          &lt;version&gt;${project.version}&lt;/version&gt;
        &lt;/dependency&gt;
    
        &lt;!-- needed because Android uses the same JSON code as playn-java;
             that should be factored into a library shared by both backends --&gt;
        &lt;dependency&gt;
          &lt;groupId&gt;com.googlecode.playn&lt;/groupId&gt;
          &lt;artifactId&gt;playn-java&lt;/artifactId&gt;
          &lt;version&gt;${project.version}&lt;/version&gt;
        &lt;/dependency&gt;
    
        &lt;dependency&gt;
          &lt;groupId&gt;com.google.android&lt;/groupId&gt;
          &lt;artifactId&gt;android&lt;/artifactId&gt;
          &lt;version&gt;${android.version}&lt;/version&gt;
          &lt;scope&gt;provided&lt;/scope&gt;
        &lt;/dependency&gt;
    
        &lt;dependency&gt;
          &lt;groupId&gt;junit&lt;/groupId&gt;
          &lt;artifactId&gt;junit&lt;/artifactId&gt;
          &lt;version&gt;4.8.1&lt;/version&gt;
          &lt;scope&gt;test&lt;/scope&gt;
        &lt;/dependency&gt;
      &lt;/dependencies&gt;
    
      &lt;build&gt;
        &lt;sourceDirectory&gt;src&lt;/sourceDirectory&gt;
      &lt;/build&gt;
    &lt;/project&gt;


Missing artifact com.sun:tools:jar

How do I check two conditions in one `&lt;c:if&gt;`? I tried this, but it raises an error:

    &lt;c:if test=&quot;${ISAJAX == 0} &amp;&amp; ${ISDATE == 0}&quot;&gt; 



How do I check two or more conditions in one &lt;c:if&gt;?

I&#39;m setting up a new dev machine with Eclipse 3.7 Indigo.  After pulling a my code down from SVN, the source tree in the Package Explorer is intermittently littered with a &gt; to the left of the file name  The parent package names have them too.  *(Note that this is an AspectJ project, but I don&#39;t think that matters.)*

![Package Explorer][1]

**What does the &gt; indicate in the Eclipse Package Manager?**


  [1]: http://i.stack.imgur.com/xUqdD.png

What does the &gt; (greater than bracket) mean beside file names in Eclipse&#39;s Package Explorer?

I'm setting up a new dev machine with Eclipse 3.7 Indigo. After pulling a my code down from SVN, the source tree in the Package Explorer is intermittently littered with a > to the left of the file name The parent package names have them too. (Note that this is an AspectJ project, but I don't think that matters.)
<img src="http://i.stack.imgur.com/xUqdD.png" alt="Package Explorer">
What does the > indicate in the Eclipse Package Manager?

If I execute `set PATH=%PATH%;C:\\Something\\bin` from the command line (`cmd.exe`) and then execute `echo %PATH%` I see this string added to the PATH. If I close and open the command line, that new string is not in PATH.

How can I update PATH permanently from the command line for all processes in the future, not just for the current process?

I don&#39;t want to do this by going to System Properties → Advanced → Environment variables and update PATH there.

This command must be executed from a Java application (please see my other [question][1]).


  [1]: https://stackoverflow.com/questions/8350663/how-can-i-set-update-path-variable-from-within-java-application-on-windows


How to update PATH variable permanently from Windows command line?

I have a collection, I want to get the last element of the collection. What&#39;s the most straighforward and fast way to do so?

One solution is to first toArray(), and then return the last element of the array. Is there any other better ones?

Java get last element of a collection

[This][1] link from the Gson project seems to indicate that I would have to do something like the following for serializing a typed Map to JSON:


        public static class NumberTypeAdapter 
          implements JsonSerializer&lt;Number&gt;, JsonDeserializer&lt;Number&gt;,
    InstanceCreator&lt;Number&gt; {
    
        public JsonElement serialize(Number src, Type typeOfSrc, JsonSerializationContext
    context) {
          return new JsonPrimitive(src);
        }
    
        public Number deserialize(JsonElement json, Type typeOfT,
    JsonDeserializationContext context)
            throws JsonParseException {
          JsonPrimitive jsonPrimitive = json.getAsJsonPrimitive();
          if (jsonPrimitive.isNumber()) {
            return jsonPrimitive.getAsNumber();
          } else {
            throw new IllegalStateException(&quot;Expected a number field, but was &quot; + json);
          }
        }
    
        public Number createInstance(Type type) {
          return 1L;
        }
      }
    
      public static void main(String[] args) {
        Map&lt;String, Number&gt; map = new HashMap&lt;String, Number&gt;();    
        map.put(&quot;int&quot;, 123);
        map.put(&quot;long&quot;, 1234567890123456789L);
        map.put(&quot;double&quot;, 1234.5678D);
        map.put(&quot;float&quot;, 1.2345F);
        Type mapType = new TypeToken&lt;Map&lt;String, Number&gt;&gt;() {}.getType();
    
        Gson gson = new GsonBuilder().registerTypeAdapter(Number.class, new
    NumberTypeAdapter()).create();
        String json = gson.toJson(map, mapType);
        System.out.println(json);
        
        Map&lt;String, Number&gt; deserializedMap = gson.fromJson(json, mapType);
        System.out.println(deserializedMap);
      }

Cool and that works, but it seems like so much overhead (***a whole Type Adapter class?***). I have used other JSON libraries like JSONLib and they let you build a map in the following way:



    JSONObject json = new JSONObject();
    for(Entry&lt;String,Integer&gt; entry : map.entrySet()){
         json.put(entry.getKey(), entry.getValue());
    }

Or if I have a custom class something like the following:

    JSONObject json = new JSONObject();
    for(Entry&lt;String,MyClass&gt; entry : map.entrySet()){
	 JSONObject myClassJson =  JSONObject.fromObject(entry.getValue());
         json.put(entry.getKey(), myClassJson);
    }


The process is more manual, but requires way less code and doesn&#39;t have the overhead of haivng to create a custom Type Adapter for Number or in most cases ***for my own custom class***.


Is this the only way to serialize a map with Gson, or has anyone found a way that beats out what Gson recommends in the link above.


  [1]: http://code.google.com/p/google-gson/issues/detail?id=45


Gson: Is there an easier way to serialize a map

I get the an exception when trying to serialize a very simple object using Jackson. The error:

&gt; org.codehaus.jackson.map.JsonMappingException: No serializer found for
&gt; class MyPackage.TestA and no properties
&gt; discovered to create BeanSerializer (to avoid exception, disable
&gt; SerializationConfig.Feature.FAIL_ON_EMPTY_BEANS) )

Below is the simple class and code to serialize. 

Can anyone tell my why I get this error?


    public class TestA {
    	String SomeString = &quot;asd&quot;;
    }

    TestA testA = new TestA();
    ObjectMapper om = new ObjectMapper();
    try {
    	String testAString = om.writeValueAsString(testA); // error here!
    	
    	TestA newTestA = om.readValue(testAString, TestA.class);
    } catch (JsonGenerationException e) {
    	// TODO Auto-generated catch block
    	e.printStackTrace();
    } catch (JsonMappingException e) {
    	// TODO Auto-generated catch block
    	e.printStackTrace();
    } catch (IOException e) {
    	// TODO Auto-generated catch block
    	e.printStackTrace();
    }



Serializing with Jackson (JSON) - getting &quot;No serializer found&quot;?

I need to create a summary table at the end of a log with some values that 
are obtained inside a class. The table needs to be printed in fixed-width 
format. I have the code to do this already, but I need to limit Strings, 
doubles and ints to a fixed-width size that is hard-coded in the code.

So, suppose I want to print a fixed-width table with

        int,string,double,string
        int,string,double,string
        int,string,double,string
        int,string,double,string

        and the fixed widths are: 4, 5, 6, 6.

If a value exceeds this width, the last characters need to be cut off. So 
for example:

        124891, difference, 22.348, montreal

the strings that need to be printed ought to be:

        1248 diffe 22.348 montre

I am thinking I need to do something in the constructor that forces a 
string not to exceed a certain number of characters. I will probably 
cast the doubles and ints to a string, so I can enforce the maximum width 
requirements.

I don&#39;t know which method does this or if a string can be instantiated to 
behave taht way.  Using the formatter only helps with the 
fixed-with formatting for printing the string, but it does not actually 
chop characters that exceed the maximum length.

Limiting the number of characters in a string, and chopping off the rest

I&#39;ve just been setting up a Ubuntu workstation and wanted to add some settings to eclipse.ini.  When I searched for the file I found:

 - /etc/eclipse.ini
 - /usr/lib/eclipse.ini

My questions are:

 - Does Eclipse actually use both files?
 - If so, in what order does it read them?
 - How does it merge them?
 - Both of the files I found are system wide, is there a location in my home directory I could put one that would effect only my instances?

Where does Eclipse look for eclipse.ini under Linux

Just put an Android project under git (*beanstalk*) version control via the command line (*mac terminal*). Next step is to set up exclusions.

 To those of you who have already been down this path:

 **What should a typical .gitignore file look like for an android project?**

*Project set up in Eclipse*


Typical .gitignore file for an Android app

When I start, Eclipse says &quot;Workspace Cannot Be Locked&quot;

&quot;Could not launch the product because the associated workspace is currently in use by another Eclipse application.&quot; or “Workspace in use or cannot be created, chose a different one.”

But I know it isn&#39;t.

How do I &quot;unlock&quot; it?

Eclipse says: “Workspace in use or cannot be created, chose a different one.” How do I unlock a workspace?

I have downloaded some open source software written in Java and tried to compile it using Eclipse.
I got the error: &quot;**The hierarchy of the type &#39;Class name&#39; is inconsistent**&quot; in some files.
What causes these errors and how do I fix them?

Eclipse compilation error: The hierarchy of the type &#39;Class name&#39; is inconsistent

I integrated Tomcat 7 in Eclipse. When I start it using Eclipse, it shows that Tomcat is up and running, but when I go to http://localhost:8080 in my browser, it gives me following error:

&gt; ##HTTP Status 404 - /

&gt; **type** Status report

&gt; **message** /

&gt; **description** The requested resource (/) is not available.  

&gt; Apache Tomcat/7.0.23

I tried changing the port in `server.xml` just in case if 8080 is used by another service, but it didn&#39;t work either. How can I solve it?

Content Type	Original Author	Original Content on Stackoverflow
Question	Stu Thompson	View Question on Stackoverflow
Solution 1 - Java	Chris	View Answer on Stackoverflow

What does the > (greater than bracket) mean beside file names in Eclipse's Package Explorer?

Java Problem Overview

Java Solutions

Solution 1 - Java

How do I check two or more conditions in one <c:if>?

Missing artifact com.sun:tools:jar

Attributions