Diagnostic Demo : Compiler Diagnostic « Development « Java Tutorial

1. Java Tutorial
2. Development
3. Compiler Diagnostic

import java.io.File;
import java.io.IOException;
import java.util.ArrayList;
import java.util.List;
import javax.tools.Diagnostic;
import javax.tools.DiagnosticCollector;
import javax.tools.JavaCompilerTool;
import javax.tools.JavaFileObject;
import javax.tools.StandardJavaFileManager;
import javax.tools.ToolProvider;
import javax.tools.JavaCompilerTool.CompilationTask;

public class DiagnosticDemo {

  public static void main(String[] args) {
    String sourceFile = "c:/HelloWorld.Java";
    JavaCompilerTool compiler = ToolProvider.getSystemJavaCompilerTool();
    DiagnosticCollector<JavaFileObject> diagnostics = new DiagnosticCollector<JavaFileObject>();
    StandardJavaFileManager fileManager =

    compiler.getStandardFileManager(diagnostics);

    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.run();
    try {
      fileManager.close();
    } catch (IOException e) {
    }
    List<Diagnostic<? extends JavaFileObject>> diagnosticList = diagnostics.getDiagnostics();
    for (Diagnostic<? extends JavaFileObject> diagnostic : diagnosticList) {
      System.out.println("Position:" + diagnostic.getStartPosition());
    }
  }
}