How to check a file if exists with wildcard in Java?

Question

I have a directory, and inside it are files are named \"a_id_XXX.zip\".

How do check if a file exists given an id and File dir

Answer 1

i created zip files named with a_id_123.zip ,a_id_124.zip ,a_id_125.zip ,a_id_126.zip and it looks like working fine but i'm not sure if it's proper answer for you. Output will be the following if files listed above exists

• found a_id_123.zip
• found a_id_124.zip
• found a_id_125.zip

• found a_id_126.zip

  public static void main(String[] args) {
  
      String pathToScan = ".";
      String fileThatYouWantToFilter;
      File folderToScan = new File(pathToScan); // import -> import java.io.File;
      File[] listOfFiles = folderToScan.listFiles();
  
      for (int i = 0; i < listOfFiles.length; i++) {
  
          if (listOfFiles[i].isFile()) {
              fileThatYouWantToFilter = listOfFiles[i].getName();
              if (fileThatYouWantToFilter.startsWith("a_id_")
                      && fileThatYouWantToFilter.endsWith(".zip")) {
                  System.out.println("found" + " " + fileThatYouWantToFilter);
              }
          }
      }
  }