How to replace multiple lines of strings from multiple files?

There are multiple utilities that can help with replacing strings from files. The challenge comes when we need to replace multiple lines of strings from multiple files from a folder that has special characters, new lines etc. to desired text such as empty string or some text.

This example folder has multiple files with different types of text. We need to remove a bulk of text with multiple new lines from these files but keep the rest of the content intact.

Below is the code sample to achieve this.

File dir = new File("C:\\ui_be_projects\\javapan");

File[] fileList = dir.listFiles();
for (File file : fileList) {

   String fileName = file.getName();
   Path path = Paths.get(file.getAbsolutePath());
   //Multiple Lines of String that needs to be removed.
   String contentToRemove = "\n" +
           "Wayback Machine\n" +
           "http://www.javapan.com/how-to-develop-build-deploy-and-run-your-applications-on-any-openshift-or-kubernetes-compatible-platform-using-openshift-client-aka-oc-command/\n" +
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           "2020\t2021\t2022\n" +
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   LinkedList<String> listOfLinesToRemove = new LinkedList<>();
   for (String line : contentToRemove.split("\\n")) {
       listOfLinesToRemove.add(line.replaceAll("\\r\\n", "").replace("\r", "").replace("\n", ""));
   }

   LinkedList<String> readLinesAsListFromFile = new LinkedList<>();
   for (String line : new String(Files.readAllBytes(path)).split("\\n")) {
       readLinesAsListFromFile.add(line.replaceAll("\\r\\n", "").replace("\r", "").replace("\n", ""));
   }

   //Removes all of this collection's elements that are also contained in the specified collection
   readLinesAsListFromFile.removeAll(new HashSet(listOfLinesToRemove));

   //If you wish to save file as date and time. This Example does not use.
   String fileNameWithDate = new SimpleDateFormat("yyyyMMddHHmm'.txt'").format(new Date());

   FileWriter writer = new FileWriter("C:\\ui_be_projects\\javapan_replaced\\" + fileName);
   for (String str : readLinesAsListFromFile) {
       writer.write(str + System.lineSeparator());
   }

   writer.close();

}