Shulou(Shulou.com)06/02 Report--

This article will explain in detail how to use Compiler API in JDK6.0. The editor thinks it is very practical, so I share it with you as a reference. I hope you can get something after reading this article.

Public class CompilerAPITester {private static String JAVA_SOURCE_FILE = "DynamicObject.java"; private static String JAVA_CLASS_FILE = "DynamicObject.class"; private static String JAVA_CLASS_NAME = "DynamicObject"; public static void main (String [] args) {JavaCompiler compiler = ToolProvider.getSystemJavaCompiler (); StandardJavaFileManager fileManager = compiler.getStandardFileManager (null, null, null); generateJavaClass () Try {/ / copies the generated class files to the program's ClassPath. The following line of code is specific to the Windows+IntelliJ IDEA 6.0project and does not have portability Runtime.getRuntime () .exec ("cmd / c copy" + JAVA_CLASS_FILE+ "classesproductionJDK6Features"); Iterable sourcefiles = fileManager.getJavaFileObjects (JAVA_SOURCE_FILE); compiler.getTask (null, fileManager, null, sourcefiles) .call () FileManager.close (); Class.forName (JAVA_CLASS_NAME). NewInstance (); / / create an instance of the dynamically compiled DynamicObject class} catch (Exception ex) {ex.printStackTrace ();}} public static void generateJavaClass () {try {FileWriter fw = new FileWriter (JAVA_SOURCE_FILE); BufferedWriter bw = new BufferedWriter (fw) Bw.write ("public class" + JAVA_CLASS_NAME+ "{"); bw.newLine (); bw.write ("public" + JAVA_CLASS_NAME+ "() {System.out.println (" In the constructor of DynamicObject ");}}"); bw.flush (); bw.close ();} catch (IOException ex) {ex.printStackTrace ();}

After the program is run, two files, DynamicObject.java and DynamicObject.class, will be generated and output in the console.

This is the end of this article on "how to use Compiler API in JDK6.0". I hope the above content can be of some help to you, so that you can learn more knowledge. if you think the article is good, please share it for more people to see.

Welcome to subscribe "Shulou Technology Information " to get latest news, interesting things and hot topics in the IT industry, and controls the hottest and latest Internet news, technology news and IT industry trends.