Java tutorial
import java.io.File; import java.util.ArrayList; import java.util.List; import javax.tools.Diagnostic; import javax.tools.DiagnosticCollector; import javax.tools.JavaCompiler; import javax.tools.JavaFileObject; import javax.tools.StandardJavaFileManager; import javax.tools.ToolProvider; import javax.tools.JavaCompiler.CompilationTask; public class Main { public static void main(String[] args) throws Exception { String sourceFile = "c:/HelloWorld.Java"; JavaCompiler compiler = ToolProvider.getSystemJavaCompiler(); DiagnosticCollector<JavaFileObject> diagnostics = new DiagnosticCollector<JavaFileObject>(); StandardJavaFileManager fileManager = compiler.getStandardFileManager(null, null, null); List<File> sourceFileList = new ArrayList<File>(); sourceFileList.add(new File(sourceFile)); Iterable<? extends JavaFileObject> compilationUnits = fileManager .getJavaFileObjectsFromFiles(sourceFileList); CompilationTask task = compiler.getTask(null, fileManager, null, null, null, compilationUnits); task.call(); fileManager.close(); List<Diagnostic<? extends JavaFileObject>> diagnosticList = diagnostics.getDiagnostics(); for (Diagnostic<? extends JavaFileObject> diagnostic : diagnosticList) { System.out.println("Position:" + diagnostic.getStartPosition()); } } }