javax.tools.JavaCompiler compile java file

[sreenivas jeenor]

I use the class javax.tools.JavaCompiler (jdk6) to compile a dynamic source file, but the source file depends on some jar file.how should i do it.

here is my code

File sourceFile = new File("d:\\Sample\\src\\com\\pilr\\utils\\JavaBuilder.java");
JavaCompiler compiler = ToolProvider.getSystemJavaCompiler();
int compilationResult=compiler.run(null, null, null, sourceFile.getPath());
			 if(compilationResult == 0){
		            System.out.println("Compilation is successful");
		        }else{
		            System.out.println("Compilation Failed");
		        }

here the code shows compile time errors for import files.


How to add jar files to compile my java file

[Muhammad Saifuddin]

If you had this jar file under classpath then you can do this way load the jars file.

File[] javaFiles = new File[]{new File(fileToCompile)};
JavaCompiler compiler = ToolProvider.getSystemJavaCompiler();

DiagnosticCollector<JavaFileObject> diagnostics = new DiagnosticCollector<JavaFileObject>();
StandardJavaFileManager fileManager = compiler.getStandardFileManager(diagnostics, null, null);

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

List<String> optionList = new ArrayList<String>();
optionList.addAll(Arrays.asList("-classpath", System.getProperty("java.class.path")));
JavaCompiler.CompilationTask task = compiler.getTask(null, fileManager, diagnostics, optionList, null, compilationUnits);
task.call();

It tested and working fine for me.
While considering its not a good idea to load all the jars instead of dependent and looking forward for the right technique.

[Daisy Smith]

Add tools.jar to your classpath. In Netbeans, this can be done by right-clicking on libraries ->Add Jar/Folder in your project column.