Extract resources from a jar from jar

PureJavaJarExtract.java

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package javaapplication23;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.util.Arrays;
import java.util.Properties;
import java.util.jar.JarFile;
import java.util.logging.Level;
import java.util.logging.Logger;
import java.util.zip.GZIPInputStream;
import org.apache.commons.io.FileUtils;

/**
 *
 * @author Mat
 */
public class JavaApplication23 {

	/**
	 * @param args the command line arguments
	 */
	public static void main(String[] args) {
		try {
			String path = "C:\\Users\\Mat\\Desktop\\sdf";
			String s = System.getProperty("java.class.path");
			JarFile jar = new JarFile( new File( s ) );
			jar.stream().forEach(e->{
				if( e.getName().contains("stuff") ) {
					InputStream is = ClassLoader.getSystemResourceAsStream(e.getName());
					File f = new File( path + File.separator + e.getName() );
					if( e.isDirectory() ) {
						f.mkdirs();
						System.out.println( "making dir " + e.getName() );
					} else {
						try {
							f.createNewFile();
							System.out.println( e.getName() );
							try (FileOutputStream fos = new FileOutputStream( f )) {
								byte[] buff = new byte[1024];
								while( is.available()>0 ) {
									is.read(buff);
									fos.write(buff);
								}
								is.close();
							}
						} catch (FileNotFoundException ex) {
							Logger.getLogger(JavaApplication23.class.getName()).log(Level.SEVERE, null, ex);
						} catch (IOException ex) {
							Logger.getLogger(JavaApplication23.class.getName()).log(Level.SEVERE, null, ex);
						}
					}
					
				}
			});
		} catch (IOException ex) {
			Logger.getLogger(JavaApplication23.class.getName()).log(Level.SEVERE, null, ex);
		}
	}
	
}