javac

Checking if Java is installed in a makefile

I'm writing a make file that compiles and runs a Java program, but it'll be run on different platforms so I want the make file to first determine if Java IS installed, and only then will it compile and run the .java file. How would I go about doing this? ...

Java generics code compiles with javac, fails with Eclipse Helios

I have the following test class that uses generics to overload a method. It works when compiled with javac and fails to compile in Eclipse Helios. My java version is 1.6.0_21. All the articles I read indicate that Eclipse is right and this code should not work. However when compiled with javac and run, the right method is selected. Ho...

Javac can't find .class files, have right classpath

Although I'm not new to programming in general, I am new to java, and it seems to work a little bit differently. When trying to compile a .java with javac it gives me this error: cannot find symbol. I looked the cause of this up, and the error occurs when the .class file that you are referencing could not be found. I ensured that all of ...

Compiling multiple packages using the command line in Java

Hi i have been using an IDE but now I need to run and compile from the command line. The problem is that I have multiple packages and I have tried to find the answer but nothing has worked. So I have src/ Support/ (.java files) Me/ (.java files) Wrapers/ (.java files) Do you know how to compile everything with javac? ...

is it possible to disable javac's inlining of static final variables?

The Java static compiler (javac) inlines some static final variables and brings the values directly to the constant pool. Consider the following example. Class A defines some constants (public static final variables): public class A { public static final int INT_VALUE = 1000; public static final int STRING_VALUE = "foo"; } Cla...

'javac' is not recognized

I have added Path variable 'C:\Program Files\Java\jdk1.6.0_21\bin' in Environment Variables, but it still gives me this error: 'javac' is not recognized as an internal or external command, operable program or batch file when I try to run javac mycode.java. I am going insane, please help. Thanks. ...

Basic Javac question. Not seeing other classes, in same dir.

Hey, I wrote a Java program that has 3 classes. When, I use javac, I am getting errors whenever my main class attempts to interact with the other classes. Is there anything special that I need to do? I am just calling javac Main.java. Any help would be greatly appreciated. Edit: DFA myDFA = new DFA(); String test = args[0]; ...

Cannot refer to a instance method while explicitly invoking a constructor

Hi, Does anyone know why you can reference a static method in the first line of the constructor using this() or super() but not a non-static method? Consider the following working: public class TestWorking{ private A a = null; public TestWorking(A aParam){ this.a = aParam; } public TestWorking(B bParam) { ...

java/javac variation in PATH setting?

Hi, In my windows machine , i can execute "java" without having PATH variable pointing to JDKs java.exe.But i am not able to run "javac" in the same way.Please tell me ,what could be the reason. C:\Documents and Settings\USR1>java -version java version "1.6.0_21" Java(TM) SE Runtime Environment (build 1.6.0_21-b07) Java HotSpot(TM) Cli...

Java 6: how to pass multiple parameters to APT

I have a Java Annotation Processor that extends from AbstractProcessor. I have two supported options, addResDir and verbose, and I am trying to set them like this: -AaddResDir=src/main/webapp -Averbose=true I have also tried this: -AaddResDir=src/main/webapp,verbose=true While a single parameter works, e.g. -AaddResDir=src/main/w...

Compiling java programs from CLI using javac

I have the following directory structure form where I am invoking javac src/ lib/ build/ Under src: src/com/xyz/App.java -- contains the main class src/com/xyz/base/j1.java src/com/xyz/base/j2.java src/com/xyz/exceptions/e1.java src/com/xyz/hibernate/factory/hbf1.java src/com/xyz/hibernate/helper/hbh1.java Under li...

Can I prevent javac accessing the Class-Path from the manifests of our third party jars?

Since Java 1.5 or so, javac has been looking into the manifest of third-party jars to find other jars. This causes a number of undesirable side-effects: As jar files have been renamed, we now get a flood of warnings whenever we compile (can be diabled with -Xlint:-path) Files we don't want on the classpath are being brought back onto...

how come ANT javac command adds extra directories?

I start studying ANT today in order to make Java compiling easier. I wrote simple ANT script which only use javac command. What I am trying is compile from .....\head_first\src\com\masatosan\constant.java (source) to the destination directory: .....\head_first\WEB-INF\classes\com\masatosan\conf So the result would look like: .....\h...

Cannot run simple compiled java program?

I am on Arch Linux, I just installed JRE and JDK and all the proper bin files (javac and java) are in /opt/java/bin/ I simply compiled a standard hello world, and compiled it with javac running javac ./hello.java and that made a class. Now my problem is running it. I run java ./helloworld.class and it gives me an error, even if the fi...

ANT - how to use exclude, excludesfile with javac?

Looked at several post on stackoverflow as well as other sources (online + ANT definition guide book) but none of them helped so far. I can't exclude the file from compiling. I have just one file that wants to exclude from compiling and ANT documentation is not really telling the detail. I'm trying to exclude HTMLParser.java from compil...

Javac exclusion of package in ANT build.xml

I'm trying to compile all my packages except two of them, here is what my javac in build.xml looks like <javac srcdir="${src}" destdir="${output}" debug="${debug}" failonerror="yes" > <exclude name="com/abc/uyyy/**"/> <exclude name="com/abc/zzz/**"/> <include name="com/abc/zzz/Text.java"/> <patt...

ANT - javac compile failure due to cannot find symbol

I'm trying to compile ActionFactory.java file which imports one of my package, RegisterAction.java Here is the file structure: /com/masatosan/actions/register/RegisterAction.java /com/masatosan/redirector/ActionFactory.java According to the ANT output, I think ANT cannot find RegisterAction.java which is imported in ActionFactory.jav...

Ant -verbose fails with "package does not exist" despite jar being on classpath

I have the following code package myPackage; import org.neo4j.graphdb; import org.neo4j.kernel.EmbeddedGraphDatabase; public class dbServlet extends HttpServlet { public void init() throws ServletException { // Start up the database here GraphDatabaseService graphDb = new...

Javac AST Symbol Resolving for JavacTask.parse()

As I posted on the official Java support forum several days ago, I want to know, if JCTree Symbols can be resolved from own code with the original javac implementation. http://forums.oracle.com/forums/thread.jspa?threadID=1774807&amp;tstart=0 JCMethodInvocation object1 = (JCMethodInvocation) objectRef.ref; Resolve resolve = Resolve.i...

java compiler's target version "jsr14" with JDK7/8

Can anybody tell me the "jsr14" target version of javac will be still available with JDK7/8? ...