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Manually opened Excel / Notepad file (Opened by user), How would like to identify this through java program

Description: Actually I am looking the java code which is basically running in the background, But whenever I want to open a new notepad or excel file, It will capture those file as an input and display the result in output console.

How I can do that, any one can help me on this.

The following mathod is based on Windows...

First of all, when opening files in software like Notepad and Excel, it is executed with a command line with parameters, that is, if Notepad is opened in E:\test.txt, the command line parameters for startup are

notepad E:\test.txt

In Windows, we can use the wmic command to get the startup parameters of an application. The specific usage is:

wmic process where caption="{exe_name}" get caption,commandline /value

For example, the cmd command to query the command line parameters opened in Notepad is:

wmic process where caption="notepad.exe" get caption,commandline /value

The returned result is similar to the following:

Caption=notepad.exe
CommandLine="C:\Windows\system32\NOTEPAD.EXE" H:\2019Summer\软件工程\任务.txt

The above "H:\2019Summer\软件工程\任务.txt" is the file I currently open by notepad. What we need to do is to parse the result String, here is my example java code:

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.text.MessageFormat;
import java.util.ArrayList;
import java.util.List;
import java.util.stream.Collectors;

public class GetOpenedFile {
    //QUERY_COMMAND
    private static String QUERY_COMMAND = "wmic process where caption=\"{0}\" get caption,commandline /value";
    private static String NOTEPAD_NAME = "notepad.exe";
    private static String EXCEL_NAME = "excel.exe";

    /**
     * get execName command line
     *
     * @param execName like notepad.exe, excel.exe
     * @return the all command line of the process {execName}
     */
    private static List<String> getExecCommandLines(String execName) {
        Runtime runtime = Runtime.getRuntime();
        List<String> commandLines = new ArrayList<>();
        try {
            Process process = runtime.exec(MessageFormat.format(QUERY_COMMAND, execName));
            BufferedReader bufferedReader = new BufferedReader(new InputStreamReader(process.getInputStream(), "GB2312"));//set your cmd charset(default value is utf8)
            String caption = null;
            while (true) {
                String s = bufferedReader.readLine();
                if (s == null) {
                    break;
                }
                if (s.length() == 0) {//skip blank string
                    continue;
                }
                //get the file name
                if (s.startsWith("Caption")) {
                    caption = s.substring("Caption=".length());
                    continue;
                }
                if (s.startsWith("CommandLine=") && caption != null) {
                    int index = Math.max(s.indexOf(caption), s.indexOf(caption.toUpperCase()));//maybe the exe file name is ALL UPPER CASE, eg. NOTEPAD.EXE
                    index += caption.length()
                            + 1;//Double quotes "
                    String commandLine = s.substring(index);// command Line
                    commandLine = commandLine.stripLeading();//strip leading white space
                    commandLines.add(commandLine);
                }
            }
        } catch (IOException e) {
            e.printStackTrace();
        }
        return commandLines;
    }

    /**
     * get notepad opened files
     *
     * @return notepad opened files
     */
    public static List<String> getNotepadOpenedFiles() {
        List<String> commandLines = getExecCommandLines(NOTEPAD_NAME);
        return commandLines.stream()
                .filter(s -> s.length() > 0)//skip empty command line
                .collect(Collectors.toList());
    }

    /**
     * get excel opened files
     * @return excel opened files
     */
    public static List<String> getExcelOpenedFiles() {
        List<String> commandLines = getExecCommandLines(EXCEL_NAME);
        return commandLines.stream()
                .filter(s -> s.length() > 0)//skip empty command line
                .map(s -> {             //map result of "filename" to filename
                    if (s.startsWith("\"") && s.endsWith("\"")) {
                        return s.substring(1, s.length() - 1);
                    } else {
                        return s;
                    }
                })
                .collect(Collectors.toList());
    }

    public static void main(String[] args) {
        //console printed
//        [H:\2019Summer\软件工程\任务.txt]
//        [E:\info.xlsx]
        System.out.println(getNotepadOpenedFiles());
        System.out.println(getExcelOpenedFiles());
    }
}

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