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How to extract content from a java .class file using Java
Problem Description
How to extract content from a java .class file using java.
Solution
Following is the program to extract content from a java .class file using java.
import java.io.File; import java.io.FileInputStream; import java.io.IOException; import org.apache.tika.exception.TikaException; import org.apache.tika.metadata.Metadata; import org.apache.tika.parser.ParseContext; import org.apache.tika.parser.asm.ClassParser; import org.apache.tika.sax.BodyContentHandler; import org.xml.sax.SAXException; public class ExtractContentFromJavaClass { public static void main(String[] args) throws IOException,SAXException, TikaException { //detecting the file type BodyContentHandler handler = new BodyContentHandler(); Metadata metadata = new Metadata(); FileInputStream inputstream = new FileInputStream(new File( "C:/tika/classFileExample.class")); ParseContext pcontext = new ParseContext(); //Html parser ClassParser ClassParser = new ClassParser(); ClassParser.parse(inputstream, handler, metadata,pcontext); System.out.println("Contents of the document:" + handler.toString()); System.out.println("Metadata of the document:"); String[] metadataNames = metadata.names(); for(String name : metadataNames) { System.out.println(name + " : " + metadata.get(name)); } } }
Input
Output
Contents of the document:public synchronized class ClassFileExample { public void ClassFileExample(); public static void main(String[]); } Metadata of the document: dc:title : ClassFileExample resourceName : ClassFileExample.class title : ClassFileExample
java_apache_tika
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