prueba.java

How To accede Windows registry with java. Example.

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package accesoregistro;

import com.ice.jni.registry.*;
import java.util.StringTokenizer;
        
/**
 *
 * @author TeimoyM
 */
public class prueba {
    
    public prueba(){
        String appString = "";
        
        RegistryKey skey = Registry.HKEY_CLASSES_ROOT;
        RegistryKey mkey = Registry.HKEY_CLASSES_ROOT;
        try{
            
        skey = skey.openSubKey("ext");
        String tt = skey.getDefaultValue();

        mkey = mkey.openSubKey(tt);
        mkey = mkey.openSubKey("shell");
        mkey = mkey.openSubKey("open");
        mkey = mkey.openSubKey("command");

        appString = mkey.getDefaultValue();

        skey.closeKey();
        mkey.closeKey();

        appString = appString.replace('"',' ');

        StringTokenizer st = new StringTokenizer(appString);
        String sst;
        StringBuffer ret = new StringBuffer();
        ret.append((String)st.nextElement());
        ret.append(" ");

        while (st.hasMoreElements()) {
            sst = (String) st.nextElement();
            if ((sst.indexOf('%') == -1))
                ret.append(sst + " ");
        }
        System.out.println(ret.toString());
        }
        catch(Exception e)
        {
            e.printStackTrace();
        }
    }    
}