java合并txt文件（swing项目）

通过输入文件路劲，将此路劲下文件合并

package com.myccb;

import java.awt.FlowLayout;
import java.awt.frame;
import java.awt.TextArea;
import java.awt.TextField;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.WindowAdapter;
import java.awt.event.WindowEvent;
import java.io.BufferedReader;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStreamReader;
import java.io.OutputStreamWriter;

import javax.swing.JButton;

class MyWindow {
    private frame f;
    private TextField tf;
    private JButton but;
    private JButton hebing;
    private TextArea ta;
    private String newFileName=“newFileName.txt“;
    private String newToFileName=“newToFileName.txt“;
    MyWindow（

 属性            大小     日期    时间   名称
----------- ---------  ---------- -----  ----

     文件        301  2019-07-02 08:49  merge_file\.classpath

     文件        386  2019-07-02 08:49  merge_file\.project

     文件        598  2019-07-02 08:49  merge_file\.settings\org.eclipse.jdt.core.prefs

     文件       1965  2019-07-02 11:17  merge_file\bin\com\myccb\MyWindow$1.class

     文件        674  2019-07-02 11:17  merge_file\bin\com\myccb\MyWindow$2.class

     文件       2884  2019-07-02 11:17  merge_file\bin\com\myccb\MyWindow$3.class

     文件        676  2019-07-02 11:17  merge_file\bin\com\myccb\MyWindow$4.class

     文件       4879  2019-07-02 11:17  merge_file\bin\com\myccb\MyWindow.class

     文件       8221  2019-07-02 11:17  merge_file\src\com\myccb\MyWindow.java

     目录          0  2019-07-02 11:30  merge_file\bin\com\myccb

     目录          0  2019-07-02 11:30  merge_file\src\com\myccb

     目录          0  2019-07-02 11:30  merge_file\bin\com

     目录          0  2019-07-02 11:30  merge_file\src\com

     目录          0  2019-07-02 11:30  merge_file\.settings

     目录          0  2019-07-02 11:30  merge_file\bin

     目录          0  2019-07-02 11:30  merge_file\src

     目录          0  2019-07-02 11:30  merge_file

----------- ---------  ---------- -----  ----

                20584                    17