javac

问题 My goal We need to pass -Xpkginfo:always arguments to javac compiler. We are using javac 1.7.0_25 . -Xpkginfo is available for this version says java doc. Expected result : package-info.class files shall be generated Actual result : javac compiler is crashing : An exception has occurred in the compiler (1.7.0_25). Please file a bug at the Java Developer Connection (http://java.sun.com/webapps/bugreport) after checking the Bug Parade for duplicates. Include your program and the following

问题 I'm trying to compile a java program using command javac -d build src/*.java -verbose It returns me the following: src\Currency.java:5: package javax.ejb does not exist import javax.ejb.*; ^ src\Currency.java:7: cannot find symbol symbol: class EJBObject public interface Currency extends EJBObject { ^ I'm using jdk1.6.0_35. CLASSPATH contains C:\wls1036_dev\modules\ which contains javax.ejb.jar What could possibly be the problem? 回答1: I faced the same problem . You need to add javaee5.jar to

问题 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

问题 Closed. This question is off-topic. It is not currently accepting answers. Want to improve this question? Update the question so it's on-topic for Stack Overflow. Closed 5 years ago . I am facing following scenario: Win XP Machine, 2003 SP, jre7 No admin rights to even set class path via my computer properties CMD prompt shows a local drive as user drive instead of C Thus unable to execute following command:- c:\program files\Java\jre7\bin It says C:\program files isn't recognized as an

问题 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 compiling. Also tried using excludesfile too. But it still complies HTMLParser.java I wrote simple ANT to examine trying different variation below. Could anyone tell

问题 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 compiling. Also tried using excludesfile too. But it still complies HTMLParser.java I wrote simple ANT to examine trying different variation below. Could anyone tell

问题 I have code of the following form: class Test { private final A t; public Test() { for ( ... : ... ) { final A u = null; } t = new A(); } private class A {} } Compiler says: variable t might already have been assigned Interestingly, if I perform any of the following changes to the loop it works out! Change the loop's content to A u = null Remove the loop (but keep final A u = null; ) Replace the foreach-style loop with a classic counting loop What is going on here? Note: I could not get the

问题 I have code of the following form: class Test { private final A t; public Test() { for ( ... : ... ) { final A u = null; } t = new A(); } private class A {} } Compiler says: variable t might already have been assigned Interestingly, if I perform any of the following changes to the loop it works out! Change the loop's content to A u = null Remove the loop (but keep final A u = null; ) Replace the foreach-style loop with a classic counting loop What is going on here? Note: I could not get the

问题 My PC is currently set up as Japanese for testing purposes. If my java project has a compilation error the message is reported in Japanese. e.g. Compiling 1 source file to [...directory...] [...class...].java:172: シンボルを見つけられません。 I would prefer to see the errors in english. Without using ant the fix for this is to use javac -J-Duser.language=en [..java files...] which makes javac give english error messages (the -J tells javac to pass the rest of the argument to java) My question is: how do I

问题 I have four java files in my folder. They are all in the same package. Here's the package declaration package com.osama.GHide All of these classes are in the same package. I want to know how can I compile them using javac (i mean i do not know how to compile multiple files that are using each other). And once that is done how do I launch then using java command in the CLI? here are the file names. EnteringPoint.java HidingProcess.java ListFiles.java 回答1: From the project's root directory: