Java wrapper for Windows registry API RegQueryInfoKey() - Java Native OS

Java examples for Native OS:Windows

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Description

Java wrapper for Windows registry API RegQueryInfoKey()

Demo Code


//package com.java2s;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.util.prefs.Preferences;

public class Main {
    private static final Preferences systemRoot = Preferences.systemRoot();
    private static Method windowsRegQueryInfoKey = null;

    /**//from  www  . ja v  a  2s  .  c om
     * Java wrapper for Windows registry API RegQueryInfoKey()
     * 
     * @param hKey
     *            the Native Handle
     * @return int[5] retval[SUBKEYS_NUMBER] will give then number of sub keys
     *         under the queried key. retval[ERROR_CODE] will give the error
     *         code. retval[VALUES_NUMBER] will give the number of values under
     *         the given key. retval[MAX_KEY_LENGTH] will give the length of the
     *         longes sub key. retval[MAX_VALUE_NAME_LENGTH] will give length of
     *         the longes value name.
     */
    public static int[] RegQueryInfoKey(int hKey) {
        try {
            return (int[]) windowsRegQueryInfoKey.invoke(systemRoot,
                    new Object[] { new Integer(hKey) });
        } catch (IllegalArgumentException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } catch (IllegalAccessException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        } catch (InvocationTargetException e) {
            // TODO Auto-generated catch block
            e.printStackTrace();
        }
        return new int[0];
    }
}

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