Get Filename without Extension in Java

import java.io.File;
import org.apache.commons.io.FilenameUtils;
 
public class NewMain
{
  public static void main(String[] args)
  {
    File file = new File("C:/This/is/a/test.txt");
    String fileNameWithOutExtension = FilenameUtils.removeExtension(file.getName());
    System.out.println(fileNameWithOutExtension); // prints 'test'
  }
}

File file = new File("C:/This/is/a/test.txt");
String fileNameWithOutExtension = file.getName();
int index = fileNameWithOutExtension.lastIndexOf('.');
if (index != -1)
  fileNameWithOutExtension = fileNameWithOutExtension.substring(0, index);
System.out.println(fileNameWithOutExtension); // prints 'test