JNA 키보드이벤트 발생 keybd_event

package openCV;

import java.awt.Toolkit;

import java.awt.datatransfer.Clipboard;

import java.awt.datatransfer.ClipboardOwner;

import java.awt.datatransfer.DataFlavor;

import java.awt.datatransfer.StringSelection;

import java.awt.datatransfer.Transferable;

import com.sun.jna.Native;

import com.sun.jna.platform.win32.User32;

import com.sun.jna.platform.win32.WinDef.HWND;

import com.sun.jna.win32.StdCallLibrary;

public class te implements ClipboardOwner {

    public interface CustomUser32 extends StdCallLibrary {

        CustomUser32 INSTANCE = (CustomUser32) Native.loadLibrary("user32", CustomUser32.class);

        HWND GetForegroundWindow();

        void keybd_event(byte bVk, byte bScan, int dwFlags, int dwExtraInfo);

    }

    public void lostOwnership(Clipboard clipboard, Transferable contents) {

        // dummy: needed for `ClipboardOwner`

    }

    void controlC(CustomUser32 customUser32) {

        customUser32.keybd_event((byte) 07/* VK_CONTROL*/, (byte) 0, 0, 0);

        customUser32.keybd_event((byte) 0x43 /* 'C' */, (byte) 0, 0, 0);

        customUser32.keybd_event((byte) 0x43 /* 'C' */, (byte) 0, 2 /* KEYEVENTF_KEYUP */, 0);

        customUser32.keybd_event((byte) 0x11 /* VK_CONTROL*/, (byte) 0, 2 /* KEYEVENTF_KEYUP */, 0);// 'Left Control Up

    }

    String getClipboardText() throws Exception {

        return (String) Toolkit.getDefaultToolkit().getSystemClipboard().getData(DataFlavor.stringFlavor);

    }

    void setClipboardText(String data) throws Exception {

        Toolkit.getDefaultToolkit().getSystemClipboard().setContents(new StringSelection(data), this);

    }

    String getSelectedText(User32 user32, CustomUser32 customUser32) throws Exception {

        HWND hwnd = customUser32.GetForegroundWindow();

        char[] windowText = new char[512];

        user32.GetWindowText(hwnd, windowText, 512);

        String windowTitle = Native.toString(windowText);

        System.out.println("Will take selected text from the following window: [" + windowTitle + "]");

        String before = getClipboardText();

        controlC(customUser32); // emulate Ctrl C

        Thread.sleep(100); // give it some time

        String text = getClipboardText();

        System.out.println("Currently in clipboard: " + text);

        // restore what was previously in the clipboard

        setClipboardText(before);

        return text;

    }

    public static void main(String[] args) throws Exception {

        te foo = new te();

        Thread.sleep(2000); // take some time for you to select something anywhere

        System.out.println(foo.getSelectedText(User32.INSTANCE, CustomUser32.INSTANCE));

    }

}