javac

Originally I was using the underscore _ as a class name. The new Java8 compiler complains that it " might not be supported after Java SE 8 ". I changed that to $ , and there is no warning any more. However I remember that $ is used by Java to indicate an inner/embedded class in the byte code. I am wondering if there is any risk to use a dollar sign $ as a class name Some background to this question. What I want to do is to overcome the fact that Java doesn't support pure function, and the _ or $ is to put an namespace to encapsulate some very generic concept (classes/static methods). and

This is annoying. I have a directory structure like this -lib --some jar files -packageName --Main.java --SomeOtherPackage --SomeOtherJavaClass.java Main.java imports SomeOtherPackage . And both java files uses jars in the lib. What I do is add the jar files independently in the CLASSPATH. And then run as: javac packageName/Main.java but it gives the error that Package not found SomeOtherPackage . Shouldn't it automatically realize the dependency and build SomeOtherPackage as well? What would be the javac command and the classpath for the above case? Thanks The normal practice is to add the

I'm having a hard time finding information about javac 's code elimination capabilities: I read that if you have something like the following, the if -statement will be eliminated: static final boolean DEBUG = false; if (DEBUG) System.out.println("Hello World!"); // will be removed But how about this, for example: static final int VALUE = 3; if (VALUE > 9) System.out.println("VALUE > 9 ???"); // will this be removed? Or this: static final SomeEnum VALUE = SomeEnum.FOO; if (VALUE==SomeEnum.BAR) System.out.println("Bar???"); // will this be removed? Since it's very difficult/impossible to

I do not have a %CLASSPATH% set up. As I understand, this should not be a problem because Javac will assume a classpath of the current directory. As you can see below, javac is unable to find my Case class even though it's in the same exact directory. Any thoughts on why this is happening? This code works fine when I use Eclipse. C:\Documents and Settings\joep\My Documents\GCJ\src\codejam2011\Round0\D>dir /B Case.class Case.java EntryPoint.java C:\Documents and Settings\joep\My Documents\GCJ\src\codejam2011\Round0\D>javac EntryPoint.java EntryPoint.java:16: cannot find symbol symbol : class

Is there any way to force Maven 2 (>2.0.10) to print the actual javac commands it's executing. We keep running out of memory even though we've bumped up the max using MAVEN_OPTS. I'd like to be able to see the actual command being executed that is running out of memory. I've tried using the verbose setting below in the pom file's plugin management section but that doesn't seem to give me the javac command: <plugin> <groupId>org.apache.maven.plugins</groupId> <artifactId>maven-compiler-plugin</artifactId> <configuration> <source>1.5</source> <target>1.5</target> <maxmem>1024m</maxmem>

Background I am writing a simple online judge (a code grading system) using PHP and MySQL. It takes submitted codes in C++ and Java, compiles them, and tests them. This is Apache running PHP 5.2 on an old version of Ubuntu. What I am currently doing I have a php program that loops infinitely, calling another php program by //for(infinity) exec("php -f grade.php"); //... every tenth of a second. Let's call the first one looper.php and the second one grade.php . (Checkpoint: grade.php should completely finish running before the "for" loop continues, correct?) grade.php pulls the earliest