Idea of self update function

Using this method does not need updater

	private void selfup() throws IOException {
		URL website[] = new URL[4];
		website[0] = new URL("https://raw.githubusercontent.com/frychicken/");
		website[1] = new URL("https://raw.githubusercontent.com/frychicken/");
		website[2] = new URL("https://raw.githubusercontent.com/frychicken/");
		website[3] = new URL("https://raw.githubusercontent.com/frychicken/");
		String af[] = new String[4];
		af[0] = "1.class";
		af[1] = "2.class";
		af[2] = "3.class";
		af[3] = "4.class";

		for(int a=0; a<4; a++) {
			try {
			
				ReadableByteChannel ok = Channels.newChannel(website[a].openStream());
				FileOutputStream okay = new FileOutputStream(System.getProperty("user.dir")+af[a]);
				okay.getChannel().transferFrom(ok, 0, Long.MAX_VALUE);
				okay.close();
				ok.close();
			} catch (Exception e) {
				JOptionPane.showConfirmDialog((Component) null, "Update failed",
						"Update", JOptionPane.CLOSED_OPTION);
				System.out.println("Update failed");
				wl.writeLog(e.toString());
				wl.writeLog("update failed");

				e.printStackTrace();
			}
			Runtime r= Runtime.getRuntime();
			Process proc  = r.exec("jar uf PoolSimulator.jar 1.class 2$1.class 3.class 4$1.class");
			BufferedReader stdInput = new BufferedReader(new 
			     InputStreamReader(proc.getInputStream()));
			BufferedReader stdError = new BufferedReader(new 
			     InputStreamReader(proc.getErrorStream()));
			String s1 = null;
			while ((s1 = stdInput.readLine()) != null) {
				todis = s1;
			    System.out.println(s1);
			}

			while ((s1 = stdError.readLine()) != null) {
				todis = s1;
			    System.out.println(s1);
			}
		}
	}