Java File Path Windows/linux

what is the best solution to create file path in Java for this two OS. Application will be used for this os , the i need to create universal String. for example : For Linux: public

Solution 1:

The best thing is to let java decide that for you like this

publicFilefolderTxt=newFile(File.separator + "home" + File.separator + "romankooo" + File.separator + "work" + File.separator + "txt" + File.separator);

Solution 2:

You can use slash character as file separator for both OS, in other words you can use C:/PDFMalwareDataAnalyser/Txt/ instead of C:\\PDFMalwareDataAnalyser\\Txt\\ it will still work on Windows OS.

Solution 3:

Use System.getProperty("os.name") for obtaining os name, depends on it set path to resource:

String resourcePath = null; 
switch (System.getProperty("os.name")) {
            case"Linux":  resourcePath ="/home/romankooo/work/txt/";
                     break;
            case"Windows":  resourcePath ="C:\\PDFMalwareDataAnalyser\\Txt\\";
                     break;
}

Solution 4:

Try this line of code and according to the string return you can adjust your code

System.getproperty("os.name");

Solution 5:

Personally I think you'd better get the folder passed in by a system property:

java -Dfolder=C:\PDFMalwareDataAnalyser\Txt\ myapp

This one you can use like this:

publicFilefolderTxt=newFile(System.getProperty("folderTxt"));

Or pass the folder by a program argument:

java myapp C:\PDFMalwareDataAnalyser\Txt\

And then use it like this:

publicFilefolderTxt=newFile(args[1]);

But if you're sticking to use constants in your code, you can use it like this:

public File folderTxt = new File(String.join(File.separator,"C:","PDFMalwareDataAnalyser","Txt"));

Or a newer version of this would be:

public File folderTxt = new File(Paths.get("C:","PDFMalwareDataAnalyser","Txt").toString());

Or you could also read a property file and store the path in that one. This would work for different OSes, you only have to create the property files before:

StringpropertyFileName= String.format("folderSettings-%s.properties", System.getProperty("os.name").replaceAll(" ","_"));
Propertiesp=newProperties();
try (InputStreamis= getClass().getResourceAsStream(propertyFileName))
{
  p.load(is);
  StringfolderName= p.getProperty("folderName");
  folderTxt = newFile(folderName);
}
catch (Exception e)
{
  // log if error occurs...
  e.printStackTrace();
}