示例#1
0
 public static void writeFile(String dir, String fileName, String content) {
   try {
     File f = new File(dir, fileName);
     FileWriter w = new FileWriter(f);
     BufferedWriter bw = new BufferedWriter(w);
     bw.write(content);
     bw.close();
     w.close();
   } catch (IOException ioe) {
     System.err.println("can't write file");
     ioe.printStackTrace(System.err);
   }
 }
 public Class<?> findClass(String s) {
   try {
     byte[] bytes = loadClassData(s);
     return defineClass(s, bytes, 0, bytes.length);
   } catch (IOException ioe) {
     try {
       return super.loadClass(s);
     } catch (ClassNotFoundException ignore) {
     }
     ioe.printStackTrace(System.out);
     return null;
   }
 }
示例#3
0
    // Writes the program to a source file, compiles it, and runs it.
    private void compileAndRun(String fileName, String code) {
      // Exceptions here can pick and choose what font to use, as needed.
      // Exceptions thrown by the program, that cause the Playground to be unstable, should be in
      // blue.

      println("Deleting old temp files...", progErr);
      new File(fileName + ".java").delete();
      new File(fileName + ".class").delete();

      println("Creating source file...", progErr);
      file = new File(fileName + ".java");

      println("Writing code to source file...", progErr);
      try {
        new FileWriter(file).append(code).close();
      } catch (IOException i) {
        println("Had an IO Exception when trying to write the code. Stack trace:", error);
        i.printStackTrace();
        return; // Exit on error
      }

      println("Compiling code...", progErr);
      // This should only ever be called if the JDK isn't installed. How you'd get here, I don't
      // know.
      if (compiler == null) {
        println("Fatal Error: JDK not installed. Go to java.sun.com and install.", error);
        return;
      }

      // Tries to compile. Success code is 0, so if something goes wrong, do stuff.
      int result =
          compiler.run(
              null,
              null,
              null,
              file
                  .getAbsolutePath()); // Possibly add a new outputstream to parse through the
                                       // compiler errors
      if (result != 0) {
        displayLog();
        println("Failed to compile.", error);
        return; // Return on error
      }

      println("Code compiled with 0 errors.", progErr);

      println("Attempting to run code...", progErr);
      run(fileName);
    }
 private static int findFreePort() {
   try {
     final ServerSocket serverSocket = new ServerSocket(0);
     try {
       return serverSocket.getLocalPort();
     } finally {
       // workaround for linux : calling close() immediately after opening socket
       // may result that socket is not closed
       synchronized (serverSocket) {
         try {
           serverSocket.wait(1);
         } catch (Throwable ignored) {
         }
       }
       serverSocket.close();
     }
   } catch (IOException e) {
     e.printStackTrace(System.err);
     return JavacServer.DEFAULT_SERVER_PORT;
   }
 }
示例#5
0
    // Creates a new thread, runs the program in that thread, and reports any errors as needed.
    private void run(String clazz) {
      try {
        // Makes sure the JVM resets if it's already running.
        if (JVMrunning) kill();

        // Some String constants for java path and OS-specific separators.
        String separator = System.getProperty("file.separator");
        String path = System.getProperty("java.home") + separator + "bin" + separator + "java";

        // Tries to run compiled code.
        ProcessBuilder builder = new ProcessBuilder(path, clazz);

        // Should be good now! Everything past this is on you. Don't mess it up.
        println(
            "Build succeeded on " + java.util.Calendar.getInstance().getTime().toString(), progErr);
        println("~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~", progErr);

        JVM = builder.start();

        // Note that as of right now, there is no support for input. Only output.
        Reader errorReader = new InputStreamReader(JVM.getErrorStream());
        Reader outReader = new InputStreamReader(JVM.getInputStream());
        // Writer inReader = new OutputStreamWriter(JVM.getOutputStream());

        redirectErr = redirectIOStream(errorReader, err);
        redirectOut = redirectIOStream(outReader, out);
        // redirectIn = redirectIOStream(null, inReader);

      } catch (IOException e) {
        // JVM = builder.start() can throw this.
        println("IOException when running the JVM.", progErr);
        e.printStackTrace();
        displayLog();
        return;
      }
    }
示例#6
0
  /**
   * Wow! much faster than compiling outside of VM. Finicky though. Had rules called r and modulo.
   * Wouldn't compile til I changed to 'a'.
   */
  protected boolean compile(String fileName) {
    String classpathOption = "-classpath";

    String[] args =
        new String[] {
          "javac",
          "-d",
          tmpdir,
          classpathOption,
          tmpdir + pathSep + CLASSPATH,
          tmpdir + "/" + fileName
        };
    String cmdLine =
        "javac"
            + " -d "
            + tmpdir
            + " "
            + classpathOption
            + " "
            + tmpdir
            + pathSep
            + CLASSPATH
            + " "
            + fileName;
    // System.out.println("compile: "+cmdLine);

    File f = new File(tmpdir, fileName);
    JavaCompiler compiler = ToolProvider.getSystemJavaCompiler();
    //		DiagnosticCollector<JavaFileObject> diagnostics =
    //			new DiagnosticCollector<JavaFileObject>();

    StandardJavaFileManager fileManager = compiler.getStandardFileManager(null, null, null);

    Iterable<? extends JavaFileObject> compilationUnits =
        fileManager.getJavaFileObjectsFromFiles(Arrays.asList(f));

    Iterable<String> compileOptions =
        Arrays.asList(new String[] {"-d", tmpdir, "-cp", tmpdir + pathSep + CLASSPATH});

    JavaCompiler.CompilationTask task =
        compiler.getTask(null, fileManager, null, compileOptions, null, compilationUnits);
    boolean ok = task.call();

    try {
      fileManager.close();
    } catch (IOException ioe) {
      ioe.printStackTrace(System.err);
    }

    //		List<String> errors = new ArrayList<String>();
    //		for (Diagnostic diagnostic : diagnostics.getDiagnostics()) {
    //			errors.add(
    //				String.valueOf(diagnostic.getLineNumber())+
    //				": " + diagnostic.getMessage(null));
    //		}
    //		if ( errors.size()>0 ) {
    //			System.err.println("compile stderr from: "+cmdLine);
    //			System.err.println(errors);
    //			return false;
    //		}
    return ok;

    /*
    File outputDir = new File(tmpdir);
    try {
    	Process process =
    		Runtime.getRuntime().exec(args, null, outputDir);
    	StreamVacuum stdout = new StreamVacuum(process.getInputStream());
    	StreamVacuum stderr = new StreamVacuum(process.getErrorStream());
    	stdout.start();
    	stderr.start();
    	process.waitFor();
              stdout.join();
              stderr.join();
    	if ( stdout.toString().length()>0 ) {
    		System.err.println("compile stdout from: "+cmdLine);
    		System.err.println(stdout);
    	}
    	if ( stderr.toString().length()>0 ) {
    		System.err.println("compile stderr from: "+cmdLine);
    		System.err.println(stderr);
    	}
    	int ret = process.exitValue();
    	return ret==0;
    }
    catch (Exception e) {
    	System.err.println("can't exec compilation");
    	e.printStackTrace(System.err);
    	return false;
    }
    */
  }