Skype URI Java

package dragorn421;

import java.awt.Desktop;
import java.io.IOException;
import java.net.URI;
import java.net.URISyntaxException;
import java.nio.charset.Charset;

public class SkypeAPI
{

    final static public String SKYPE_PROTOCOL = "skype:";
    final static private Charset UTF_8_CHARSET = Charset.forName("UTF-8");

    private SkypeAPI() {}

    static public boolean runSkypeOrFocusIt()
    {
        return SkypeAPI.runURI(SkypeAPI.SKYPE_PROTOCOL + "?");
    }

    static public boolean call(final String contact, final String... additionalContacts)
    {
        return SkypeAPI.call(false, contact, additionalContacts);
    }

    static public boolean call(final boolean video, final String contact, final String... additionalContacts)
    {
        return SkypeAPI.callTopic(video, null, contact, additionalContacts);
    }

    static public boolean callTopic(final String topicName, final String contact, final String... additionalContacts)
    {
        return SkypeAPI.callTopic(false, topicName, contact, additionalContacts);
    }

    static public boolean callTopic(final boolean video, final String topicName, final String contact, final String... additionalContacts)
    {
        String contacts = contact;
        for(final String c : additionalContacts)
            contacts += (";" + c);
        return SkypeAPI.runURI(SkypeAPI.SKYPE_PROTOCOL + contacts + "?call" + ((topicName==null)?(""):("&topic=" + SkypeAPI.escapeString(topicName))) + ((video)?("&video=true"):("")));
    }

    static public boolean createGroup(final String contact, final String... additionalContacts)
    {
        return SkypeAPI.createGroupTopic(null, contact, additionalContacts);
    }

    static public boolean createGroupTopic(final String topicName, final String contact, final String... additionalContacts)
    {
        String contacts = contact;
        for(final String c : additionalContacts)
            contacts += (";" + c);
        return SkypeAPI.runURI(SkypeAPI.SKYPE_PROTOCOL + contacts + "?chat" +
            ((topicName==null)?(""):("&topic=" + SkypeAPI.escapeString(topicName))));
    }

    static public boolean runURI(final String uriS)
    {
        Swagg421.p(uriS);
        URI uri;
        try {
            uri = new URI(uriS);
        } catch (URISyntaxException e) {
            e.printStackTrace();
            return false;
        }
        try {
            Desktop.getDesktop().browse(uri);
        } catch (IOException e) {
            e.printStackTrace();
            return false;
        }
        return true;
    }

    public static String escapeString(String s)
    {
        String hexa, es = "";
        for(final byte b : s.getBytes(SkypeAPI.UTF_8_CHARSET))
        {
            if(Character.isLetterOrDigit(b))
            {
                es += new String(new byte[]{b}, SkypeAPI.UTF_8_CHARSET);
                continue;
            }
            hexa = Integer.toString(b, 16);
            if(hexa.length() == 1)
                hexa = ("0" + hexa);
            es += ("%" + hexa);
        }
        return es;
    }

    public static String unescapeString(String s)
    {
        final byte bytes[] = s.getBytes();
        String es = "";
        for(int i=0;i<bytes.length;i++)
        {
            if(bytes[i] == '%')
            {
                es += new String(new byte[]{(byte) Integer.parseInt(new String(new byte[]{bytes[i+1], bytes[i+2]}, SkypeAPI.UTF_8_CHARSET), 16)}, SkypeAPI.UTF_8_CHARSET);
                i += 2;
            }
            else
                es += new String(new byte[]{bytes[i]}, SkypeAPI.UTF_8_CHARSET);
        }
        return es;
    }

}