File Path separator in Java

While working on automation when setting file path we may use the file path separator such as / or \.Some use-cases are setting driver path, download directory etc.
We generally use / on UNIX and \ on Windows. The best practice is to use a separator, not to hardcode.
Let's see how we use it with Java.

We can do it in 3 ways irrespective of any platform

1.System.getProperty(“file.separator”)

public class GetFileSeparator {
 public static void main(String[] args) {
 // unix / , windows \
 String separator = System.getProperty(“file.separator”);
 System.out.println(separator);
 }
}

2.FileSystems.getDefault().getSeparator() (Java NIO)

public class GetFileSeparator2 {
 public static void main(String[] args) {
 // unix / , windows \
 String separator = FileSystems.getDefault().getSeparator();
 System.out.println(separator);
 }
}

3.File.separator Java IO

public class GetFileSeparator3 {
 public static void main(String[] args) {
 // unix / , windows \
 String separator = File.separator;
 System.out.println(separator);
 }
}

Note: For System.getProperty("file.separator"), we can override the value by System.setProperty() or command line -Dfile.separator. Both File.separator and FileSystems.getDefault().getSeparator() will return the same separator.