Cannot access and run batch file commands using java class

Question

I have created a java class to execute a batch file that is in my desktop so that the commands in the batch file will be executed too. The problem is that, i keep getting the error:

The filename, directory name, or volume label syntax is incorrect. The filename, directory name, or volume label syntax is incorrect.

I have checked the .bat name and the directory. It is correct. When i type cmd /c start C:/Users/attsuap1/Desktop, windows explorer opens the desktop tab. However when i type cmd /c start C:/Users/attsuap1/Desktop/DraftBatchFile.bat, it gives the error. My DraftBatchFile.bat is in my desktop.

Here are my java codes:

public class OpenDraftBatchFile{
public OpenDraftBatchFile() {
    super();
}

/**Main Method
 * @param args
 */
public static void main(String[] args) {
    //Get Runtime object
    Runtime runtime = Runtime.getRuntime();
    try {
        //Pass string in this format to open Batch file
        runtime.exec("cmd /c start C:/Users/attsuap1/Desktop/DraftBatchFile.bat");
    } catch (IOException e) {
        System.out.println(e);
    }
}

Why is it that the batch file cannot be executed even if the directory is correct? Someone please help me. Thank you so much.

These are the codes in DraftBatchFile.bat

@echo off echo.>"Desktop:\testing\draft.txt" @echo Writing text to draft.txt> Desktop:\testing\draft.txt

When i execute the DraftBatchFile.bat by running the java class, i want a draft.txt file to be created in a testing folder that i have created (in desktop).

Check the PATH environment variable. See the link to change the path java.com/en/download/help/path.xml — Rudra
– Rudra, Commented Nov 23, 2017 at 8:29
Hi, thanks for helping. What should be added to the Path environment? — Susha Naidu
– Susha Naidu, Commented Nov 23, 2017 at 8:34
@YevhenDanchenko it is better to use %userprofile%\Desktop as per my answer below because if this is being run on other systems, user attsuap will not exist — user7818749
– user7818749, Commented Nov 23, 2017 at 9:01

score 2 · Accepted Answer · 2017-11-23 09:14:32Z

2

there is no such thing as desktop:\

Instead try something like this.

@echo off
echo . %userprofile%\Desktop\testing\dblank.txt
@echo Writing text to draft.txt > %userprofile%\Desktop\testing\dblank.txt

edited Nov 23, 2017 at 9:14

answered Nov 23, 2017 at 8:57

user7818749

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6 Comments

Susha Naidu Over a year ago

I still get the error The filename, directory name, or volume label syntax is incorrect. i got no idea why :( i edited the batch file. I edited runtime.exec("cmd /c start %userprofile%/Desktop/DraftBatchFile.bat"); that line of code in my java class however when i run my java class i still dont get what i want it still gives error

Susha Naidu Over a year ago

I want the draft.txt file to be created in the testing folder i have created in my desktop. Actually, i just have to prove, when i run my java class, my batch file is being executed. Is there any other simpler commands that i can put in my batch file to prove that?

Susha Naidu Over a year ago

I will create a new batch file instead and try it out

user7818749 Over a year ago

@SushaNaidu try my batch code now please, I edited my answer I forgot to replace the desktop:\ part in the first echo.

Susha Naidu Over a year ago

IT WORKED ! Thank you so much ! :)

|

Dumbo · Accepted Answer · 2017-11-23 09:59:39Z

You just need to change a directory and create new subdirectory if it not exist. My offer is change .bat file like this:

@echo off
if not exist "%userprofile%\Desktop\testing" mkdir "%userprofile%\Desktop\testing"
echo.>"%userprofile%\Desktop\draft.txt"
@echo Writing text to draft.txt>"%userprofile%\Desktop\draft.txt"

Also you can create .txt file and write in it text through Java code:

    File directory = new File(System.getProperty("user.home")+"//Desktop//testing");
    if (!directory.exists())
         directory.mkdirs();
    String content = "Writing text to draft.txt";
    File file = new File(System.getProperty("user.home")+"//Desktop//testing//draft.txt");
    BufferedWriter writer = null;
    try {
        writer = new BufferedWriter(new FileWriter(file));
        writer.write(content);
    } catch (Exception e) {
        e.printStackTrace();
    } finally {
        try {
            if (writer != null)
                writer.close();
        } catch (Exception e) {
            e.printStackTrace();
        }
    }

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