Jar file Extraction in different directory...

Question

Hi friends..
i want to extract a jar file using a java program..but not in current directory..i want it to do in another directory..
i tried it using exec(jarfilename,env var,filedirectory) ..but it is not working..help me..
thanks..
Krishna

Answer 1

Hi Krishna,
The following code will definitely help you
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.util.zip.ZipEntry;
import java.util.zip.ZipInputStream;
* @author Snehanshu
public class Main {
     * Extracts a zip file
    public void extractZipFile() {
        try {
            String zipFileName = "C:\\DEMO.jar";
            String extractedFileName = "C:\\extracted.txt";
            //Create input and output streams
            ZipInputStream inStream = new ZipInputStream(new FileInputStream(zipFileName));
            OutputStream outStream = new FileOutputStream(extractedFileName);
            ZipEntry entry;
            byte[] buffer = new byte[1024];
            int nrBytesRead;
            //Get next zip entry and start reading data
            if ((entry = inStream.getNextEntry()) != null) {
                while ((nrBytesRead = inStream.read(buffer)) > 0) {
                    outStream.write(buffer, 0, nrBytesRead);
            //Finish off by closing the streams
            outStream.close();
            inStream.close();
        } catch (IOException ex) {
            ex.printStackTrace();
     * @param args the command line arguments
    public static void main(String[] args) {
        new Main().extractZipFile();
}Change the "extractedFileName" as you want.
:)