Question

javac: invalid source release: 1.5

Asked by: mdoland

I am trying to compile my code with JDK 1.4.2. It used to work with 1.4.2, but now it doesn't seem to work anymore. What do I need to do to find out where ther error is? It doesn't give much of a help.

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Asked On
2009-01-29 at 01:26:03ID24093895
Topics

Java Programming Language

,

Java Standard Edition

Participating Experts
3
Points
500
Comments
19

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Answers

 

by: ksivananthPosted on 2009-01-29 at 01:28:56ID: 23495484

how are you compiling it?

if in eclispse, look at the problems tab!

 

by: objectsPosted on 2009-01-29 at 01:29:46ID: 23495489

sounds like you are using the wrong compile command line, how are you compiling?

 

by: objectsPosted on 2009-01-29 at 01:31:19ID: 23495500

if you are using 1.4 JDK then you should not need any options.
if >1.4 then use -target 1.4 -source 1.4

 

by: mdolandPosted on 2009-01-29 at 01:32:06ID: 23495505

I am using Eclipse. Here is the Ant call. THe compiler is set to 1.4.2 and seems to be the one running also.

      <target name="build" depends="init,set_build_classpath" description="Compiles Java source to class files">
            <javac classpathref="client.build.classpath"
                  fork="yes"
                  memorymaximumsize="120m"
           destdir="${build.dir}/classes"
           debug="on"
           source="${client.java.language.level}"
           srcdir="${src.dir}"
           deprecation="true"/>
      </target>

 

by: objectsPosted on 2009-01-29 at 01:34:05ID: 23495519

your language level appears set to 1.5

 

by: ksivananthPosted on 2009-01-29 at 01:34:13ID: 23495521

whats the message it prints out?

 

by: objectsPosted on 2009-01-29 at 01:35:42ID: 23495523

checjk the java comiler settings in the project properties

 

by: mdolandPosted on 2009-01-29 at 02:46:34ID: 23495866

I probably found the base error, that is I use pregenerated libraries that are based on what is in the JAVA_HOME (and that was 1.5). However, now when I compile, it just referes to the compile task:

F:\DevelopmentView\build\include\compiler.xml:137: Error running C:\Program\Java\j2sdk1.4.2_18\bin\javac.exe compiler

The error message from the log doesn't help that much either:
org.eclipse.core.runtime.CoreException: File not found: F:\DevelopmentView\TestClient\build\classes\test\client\gui\TestDialog.class.
      at org.eclipse.core.internal.filesystem.Policy.error(Policy.java:55)
      at org.eclipse.core.internal.filesystem.local.LocalFile.openInputStream(LocalFile.java:365)
      at org.eclipse.core.internal.localstore.FileSystemResourceManager.read(FileSystemResourceManager.java:642)
      at org.eclipse.core.internal.resources.File.getContents(File.java:298)
      at org.eclipse.jdt.internal.core.util.Util.getResourceContentsAsByteArray(Util.java:1085)
      at org.eclipse.jdt.internal.core.builder.IncrementalImageBuilder.writeClassFileCheck(IncrementalImageBuilder.java:858)
      at org.eclipse.jdt.internal.core.builder.IncrementalImageBuilder.writeClassFileContents(IncrementalImageBuilder.java:800)
      at org.eclipse.jdt.internal.core.builder.AbstractImageBuilder.writeClassFile(AbstractImageBuilder.java:809)
      at org.eclipse.jdt.internal.core.builder.AbstractImageBuilder.acceptResult(AbstractImageBuilder.java:186)
      at org.eclipse.jdt.internal.compiler.Compiler.compile(Compiler.java:484)
      at org.eclipse.jdt.internal.core.builder.AbstractImageBuilder.compile(AbstractImageBuilder.java:363)
      at org.eclipse.jdt.internal.core.builder.IncrementalImageBuilder.compile(IncrementalImageBuilder.java:306)
      at org.eclipse.jdt.internal.core.builder.AbstractImageBuilder.compile(AbstractImageBuilder.java:300)
      at org.eclipse.jdt.internal.core.builder.IncrementalImageBuilder.build(IncrementalImageBuilder.java:130)
      at org.eclipse.jdt.internal.core.builder.JavaBuilder.buildDeltas(JavaBuilder.java:265)
      at org.eclipse.jdt.internal.core.builder.JavaBuilder.build(JavaBuilder.java:193)
      at org.eclipse.core.internal.events.BuildManager$2.run(BuildManager.java:633)
      at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:37)
      at org.eclipse.core.internal.events.BuildManager.basicBuild(BuildManager.java:170)
      at org.eclipse.core.internal.events.BuildManager.basicBuild(BuildManager.java:201)
      at org.eclipse.core.internal.events.BuildManager$1.run(BuildManager.java:253)
      at org.eclipse.core.runtime.SafeRunner.run(SafeRunner.java:37)
      at org.eclipse.core.internal.events.BuildManager.basicBuild(BuildManager.java:256)
      at org.eclipse.core.internal.events.BuildManager.basicBuildLoop(BuildManager.java:309)
      at org.eclipse.core.internal.events.BuildManager.build(BuildManager.java:341)
      at org.eclipse.core.internal.resources.Workspace.build(Workspace.java:330)
      at org.eclipse.debug.internal.core.LaunchConfiguration.launch(LaunchConfiguration.java:736)
      at org.eclipse.debug.internal.core.LaunchConfiguration.launch(LaunchConfiguration.java:614)
      at org.eclipse.debug.internal.ui.DebugUIPlugin.buildAndLaunch(DebugUIPlugin.java:880)
      at org.eclipse.debug.internal.ui.DebugUIPlugin$8.run(DebugUIPlugin.java:1083)
      at org.eclipse.core.internal.jobs.Worker.run(Worker.java:55)
Caused by: java.io.FileNotFoundException: F:\DevelopmentView\TestClient\build\classes\test\client\gui\TestDialog.class.

      at java.io.FileInputStream.open(Native Method)
      at java.io.FileInputStream.<init>(FileInputStream.java:106)
      at org.eclipse.core.internal.filesystem.local.LocalFile.openInputStream(LocalFile.java:356)
      ... 29 more

 

by: objectsPosted on 2009-01-29 at 02:53:47ID: 23495893

What is the Java Compiler settings for the project?

 

by: mdolandPosted on 2009-01-29 at 03:01:56ID: 23495940

1.4 and that is mapped to my j2sdk1.4.2_18 directory

 

by: mdolandPosted on 2009-01-29 at 03:06:14ID: 23495963

Another weird thing (in Eclipse) is that imports that some files complain about that it cannot resolve other classes or interfaces to a type (even though they are in the very same package). The classes they complain about has worked for a long time. I even stripped those classes down to virtually nothing, and it still complained about them.  This is not during compilation, but it signals by underlining with red.

 

by: objectsPosted on 2009-01-29 at 03:08:57ID: 23495976

sounds like your eclipse or jdk are a bit sick

> I probably found the base error, that is I use pregenerated libraries that are based on what is in the JAVA_HOME (and that was 1.5).

can you explain further about this



 

by: ksivananthPosted on 2009-01-29 at 03:36:56ID: 23496099

>>This is not during compilation, but it signals by underlining with red.

can you close your editor and open again... I have seen this type immatured err and lots of time resolved by opeining it again!

 

by: mdolandPosted on 2009-01-29 at 04:11:04ID: 23496311

objects:
I used to work with som e1.5 stuff not related to what I am doing now. Then I changed back in Eclipse, but forgot to change back in the WIndows system environment. This is a problem since I use jar-files that are fetched and built depending on java version. Later on the libraries are the base for the path creatin - the project files are created. When I changed the Java in the environment and rerun the dependncy creation sript, I got rid of that problem.

ksivananth:
I have had that problem before also, and also have some tricks to get rid of it. However, it keeps getting more and more stubborn. It comes back faster and faster and restarts and other tricks tend not to help.

 

by: objectsPosted on 2009-01-29 at 04:17:01ID: 23496360

why do u need to change anything in windows?
eclipse lets u pick whicj jdk to use in the prefs

 

by: mdolandPosted on 2009-01-29 at 04:32:22ID: 23496473

It's because there is a command prompt file (.bat) that sets up the environment. It ofcourse could be run directly from Eclipse (or at least the contents of it since it is ant). The problem is that I forgot about the dependency to the system env. when I run the script.

 

by: objectsPosted on 2009-01-29 at 13:54:59ID: 23503122

sets up what environment exactly?

 

by: jwentingPosted on 2009-06-30 at 03:19:44ID: 24743798

-source flag is not part of the environment. It's part of the compiler command line.
You're supplying the 1.4 compiler with a flag telling it to compile 1.5 sources. It won't allow that because it knows nothing of them.
If you're compiling using ANT or Maven (or some other build tool) change its project file.
If you're compiling by calling the compiler from the commandline directly, remove the -target 1.5 flag.

20120131-EE-VQP-002

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