as you write the it with double-quotes, you don’t need to escape spaces with \ export PATH=$PATH:”/cygdrive/C/Program Files/Java/jdk1.6.0_23/bin/” of course this also works: export PATH=$PATH:/cygdrive/C/Program\ Files/Java/jdk1.6.0_23/bin/
I’ve run the above code in Mac OS Java 7. None of them works. So i wrote one https://github.com/trung/InMemoryJavaCompiler StringBuilder source = new StringBuilder() .append(“package org.mdkt;\n”) .append(“public class HelloClass {\n”) .append(” public String hello() { return \”hello\”; }”) .append(“}”); Class<?> helloClass = InMemoryJavaCompiler.compile(“org.mdkt.HelloClass”, source.toString());
From the javac docs: -source Specifies the version of source code accepted. -target Generate class files that target a specified version of the VM. Class files will run on the specified target and on later versions, but not on earlier versions of the VM. In your example: -source 1.5 and -target 1.6 This would be … Read more
If you’ve got files encoded in a particular way, it’s probably best to tell javac that rather than forcing the whole JVM to use a particular encoding. The javac task has an encoding attribute for this reason. <javac srcdir=”${src.dir}” destdir=”${build.classes.dir}” encoding=”iso-8859-1″ /> But really, you should just convert the source files to UTF-8. Everything tastes … Read more
Just set the path variable to JDK bin in environment variables. Variable Name : PATH Variable Value : C:\Program Files\Java\jdk1.8.0_31\bin But the best practice is to set JAVA_HOME and PATH as follow. Variable Name : JAVA_HOME Variable Value : C:\Program Files\Java\jdk1.8.0_31 Variable Name : PATH Variable Value : %JAVA_HOME%\bin
Make sure that “Hide Warnings” option is disabled in the Messages panel on the left:
What exactly is the sjavac tool? The sjavac tool is an (allegedly smart) wrapper around javac, developed at Oracle and intended to provide the following features: incremental compiles – recompile only what’s necessary parallel compilation – utilize more than one core during compilation keep compiler in a hot VM – reuse a JIT’ed javac instance … Read more
The cast is technically possible. It cannot easily be proven by javac that it is not so in your case and the JLS actually defines this as a valid Java program, so flagging an error would be incorrect. This is because List is an interface. So you could have a subclass of a Date that … Read more
I have found the answer myself. When javac is compiling code it doesn’t link against rt.jar by default. Instead it uses special symbol file lib/ct.sym with class stubs. Surprisingly this file contains many but not all of internal sun classes. In my case one of those more-internal-than-usual classes was sun.awt.event.IgnorePaintEvent. And the answer to my … Read more
This was done as part of https://openjdk.java.net/jeps/181: Nest-Based Access Control, so that the JVM can allow access to private methods from nested classes. Before that change, the compiler would have to generate a package-protected synthetic method in the Base class, which the nested class invokes. That synthetic method would in turn call the private method … Read more