JACOB DOC turn efficient code TXT

import java.io.BufferedReader;
import java.io.DataInputStream;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;
import java.io.Writer;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import javax.swing.JLabel;
import com.jacob.activeX.ActiveXComponent;
import com.jacob.com.Dispatch;
import com.jacob.com.Variant;
public class testth{
public static void  main(String[] args)//调用Jacob，将doc文件转换为txt格式
{String docPath = "source file path name";
   // According to the file path, create a file object
  String tpFile="D://2.txt";
// Start Word program
ActiveXComponent app = new ActiveXComponent("Word.Application");
// set word invisible
app.setProperty("Visible", new Variant(false));
// Get the object DOCUMENT
Object docs = app.getProperty("Documents").toDispatch();
// Open doc document input
Object doc = Dispatch.invoke((Dispatch) docs, "Open", Dispatch.Method,
new Object[] { docPath, new Variant(false), new Variant(true) },
new int[1]).toDispatch();
// Save File
Dispatch.invoke((Dispatch) doc, "SaveAs", Dispatch.Method,
new Object[] { tpFile, new Variant(7) }, new int[1]);
// set immutable
Variant ftemp = new Variant(false);
// close and exit
Dispatch.call((Dispatch) doc, "Close", ftemp);
app.invoke("Quit", new Variant[] {});
app.safeRelease();

}}