javac

I have a problem involving setting up Java. I have installed the JRE, added its path to PATH , and set JAVA_HOME and CLASSPATH . Now, java and javacpl work fine, but running javac generates a command-not-found error. Furthermore, javac.exe does not even seem to exist in the JRE's bin folder. How do I run javac ? Ken Liu The JRE is merely the Java Runtime Environment , which includes only the infrastructure needed to run Java programs that are already compiled. To compile Java source code using javac , you need the Java Development Kit (JDK). On Oracle's Java download page , choose the package

I want to try some frameworks features that required names of parameter in runtime, so I need to compile my app with -parameters and it will store the names of parameter in JVM byte code. Which drawbacks except the size of jar/war exist of this parameter usage? The addition of parameter names to the class file format is covered by JEP 118 , which was delivered in Java 8. There was a little bit of discussion about why inclusion of parameter names was made optional in OpenJDK email threads here and here . Briefly, the stated reasons to make parameter names optional are concerns about class file

I'm trying to switch a project to Java8, and encounter odd differences between Eclipse Luna and javac's type inference. With JDK 1.7.0_65 javac this code compiles just fine. JDK 1.8.0_11 complains that both toString(char[]) and toString(Throwable) match for the "toString(getKey(code, null));" line. Eclipse Luna 4.4 (I20140606-1215) compiles it happily with either JDK: public class TypeInferenceTest { public static String toString(Object obj) { return ""; } public static String toString(char[] ca) { return ""; } public static String toString(Throwable t) { return ""; } public static <U> U

I am trying to use the JavaCompiler class: http://docs.oracle.com/javase/6/docs/api/javax/tools/JavaCompiler.html When I call ToolProvider.getSystemJavaCompiler() it returns null. I think this is because I'm using a JRE instead of a JDK. The problem is I want it to run on all platforms regardless of weather the user is using a JRE or a JDK. If anyone knows how to fix this, or an alternative method to use please comment. Any help would be appreciated. ToolProvider.getSystemJavaCompiler() is not available. Is tools.jar missing from the classpath? Set class path to the tools.jar file which can

I have a helper lib that I wrote to sit on top of Apache Commons, and when I try to javac it (so that I can make it into a jar) it complains, quite reasonably, that it has no idea what I'm talking about when I make reference to the stuff that's in the commons.jar. How does one include a jar so as that javac can compile? zengr For windows: javac -cp ".;/dir/commons.jar;/dir/more_jar_files.jar" MyClass.java For unix or mac (thanks for the tip Dawood): javac -cp ".:/dir/commons.jar:/dir/more_jar_files.jar" MyClass.java Which means: javac -cp <path to jar> MyClass.java 来源： https://stackoverflow

I'm encountering a bug in the Java compiler where the order of files submitted for compilation can cause code not to compile. I've drilled down the code to isolate the smallest amount of code I could to reproduce the problem, resulting in three source files (1 class each). public interface ActionSpec { public abstract int run(String param); } public enum Actions implements ActionSpec { SKIP { public int run(String d) { return 0; } }; } public class Program { public static void main(String[] args) { Actions.SKIP.run("hello"); } } The problem is reproducible by having javac arguments in a