exception thrown while building the java application using netbeans

Question

Suddenly, while opening and building the application this exception was thrown:

java.lang.IllegalArgumentException: Malformed \uxxxx encoding.
    at java.util.Properties.loadConvert(Properties.java:552)
    at java.util.Properties.load0(Properties.java:374)
    at java.util.Properties.load(Properties.java:325)
    at org.netbeans.modules.java.source.indexing.FQN2Files.load(FQN2Files.java:112)
    at org.netbeans.modules.java.source.indexing.FQN2Files.<init>(FQN2Files.java:78)
    at org.netbeans.modules.java.source.indexing.FQN2Files.forRoot(FQN2Files.java:70)
    at org.netbeans.modules.java.source.indexing.JavaParsingContext.<init>(JavaParsingContext.java:110)
    at org.netbeans.modules.java.source.indexing.JavaCustomIndexer$2.run(JavaCustomIndexer.java:332)
    at org.netbeans.modules.java.source.indexing.JavaCustomIndexer$2.run(JavaCustomIndexer.java:328)
    at org.netbeans.modules.java.source.usages.ClassIndexManager.prepareWriteLock(ClassIndexManager.java:120)
    at org.netbeans.modules.java.source.indexing.JavaCustomIndexer.clearFiles(JavaCustomIndexer.java:328)
    at org.netbeans.modules.java.source.indexing.JavaCustomIndexer.access$600(JavaCustomIndexer.java:123)
    at org.netbeans.modules.java.source.indexing.JavaCustomIndexer$Factory.filesDeleted(JavaCustomIndexer.java:883)
    at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Work.delete(RepositoryUpdater.java:2063)
    at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Work.scanFiles(RepositoryUpdater.java:2502)
    at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$FileListWork.getDone(RepositoryUpdater.java:2796)
[catch] at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Work.doTheWork(RepositoryUpdater.java:2582)
    at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Task._run(RepositoryUpdater.java:4681)
    at org.netbeans.modules.parsing.impl.indexing.RepositoryUpdater$Task.run(RepositoryUpdater.java:4618)
    at org.netbeans.modules.parsing.impl.TaskProcessor.callParserResultTask(TaskProcessor.java:618)
    at org.netbeans.modules.parsing.impl.TaskProcessor$CompilationJob.run(TaskProcessor.java:728)
    at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:441)
    at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:303)
    at java.util.concurrent.FutureTask.run(FutureTask.java:138)
    at java.util.concurrent.ThreadPoolExecutor$Worker.runTask(ThreadPoolExecutor.java:886)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:908)
    at java.lang.Thread.run(Thread.java:662)

I have searched the meaning of this error but I couldn't understand the solution. Could some body help me quickly and please to make your answer simple to follow.

The error Malformed \uxxxx encoding is because you might be passing an invalid or bad unicode character to some method. Without some code, that's all I can say. — vidit
– vidit, Commented May 31, 2013 at 18:10
thnx for helping but how could i find where this passing is? — BDeveloper
– BDeveloper, Commented May 31, 2013 at 18:18
My guess is that it's a problem with some path in your project configuration, not in your code - based upon the fact that only the Java library and Netbeans show up in the stack trace. — CmdrMoozy
– CmdrMoozy, Commented May 31, 2013 at 18:19

CmdrMoozy · Accepted Answer · 2013-05-31 18:14:55Z

1

Via Google, it looks like the problem might be an improperly specified path. If you specify a path like this:

C:\Documents and Settings\jdoe

The \ character can be interpreted as a bad unicode character, if the following character is a "u". The solution is one of the following:

Excape the \ with another \ - e.g.:

C:\\Documents and Settings\\jdoe
Use / instead (this is probably the better solution, since it works on all platforms - not just Windows - e.g.:

C:/Documents and Settings/jdoe

answered May 31, 2013 at 18:14

CmdrMoozy

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4 Comments

BDeveloper Over a year ago

i'm really passing some paths but i'm using the / char and it was working perfectly but this exception where thrown suddenly.. is there any thing could cause this exception..

CmdrMoozy Over a year ago

Basically, you either have an improperly specified path, or you have a unicode character "\u####" somewhere that is invalid. Because the stack trace doesn't include your code, I might look for weird special characters in your properties or other non-source files, rather than in your source code - same for paths.

BDeveloper Over a year ago

actually i'm not expert in reading the properties files but i've tried and i couldn't as i think find any weird char. could you give my an example.

CmdrMoozy Over a year ago

You're looking for any `` characters, or any other characters that are not ASCII printable characters (en.wikipedia.org/wiki/Ascii#ASCII_printable_characters). There are so many possible examples, I'm not sure I can provide a specific one that is very meaningful.

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