So I've come across an annoying little issue between the api for javax.tools.JavaCompiler and the cmd line compiler (which are the same thing!). I simply want to use an argument to javac like: *-d C:\compiled\ C:\programs\HelloWorld.java *. This works great in cmd prompt, but my code is failing, saying that the file doesn't exist.
public class Test {
private static String programsDir = "C:\\programs\\";
private static String compiledDir = "C:\\compiled\\";
private static String fileName = "HelloWorld.java";
public static void main(String[] args){
JavaCompiler compiler = ToolProvider.getSystemJavaCompiler();
String arguments = "-d " + compiledDir + " " + programsDir + fileName ;
compiler.run(System.in, System.out, System.err, arguments);
}
The output is:
javac: file not found: -d C:\compiled\ C:\programs\HelloWorld.java
Usage: javac <options> <source files>
use -help for a list of possible options
But I can cut and paste "-d C:\compiled\ C:\programs\HelloWorld.java" into javac. That is, javac -d C:\compiled\ C:programs\HelloWorld.java works.
run expects a list of args, have you tried:
String[] args = {"-d", compiledDir, programsDir + fileName};
compiler.run(System.in, System.out, System.err, args);