Question

i have a for each loop for file array. For each file there are certain operations performed which are common. There are lot of such files to be processed and its time consuming. I was thinking if java threads can help me achieve higher performance. I am new to java thread programming. Any help needed

Answer 1

suppose FileReader Class contains the logic for processing a single File

public class FileReader implements Runnable {

String fileName;

public FileReader(String fileName) {
   this.fileName = fileName;
}

public void run() {

 processFile(fileName);

}

private void processFile(String fileName) {
  // Your logic of processing the file.
}

}

Then add the following code to process the files in a directory

You should always use a thread pool to make sure you use the system resources elegantly

private static final int THREAD_COUNT = 10;
private static final ThreadPoolExecutor pool = new ThreadPoolExecutor(
        THREAD_COUNT, THREAD_COUNT, 10, TimeUnit.SECONDS,
        new LinkedBlockingQueue<Runnable>());

for each file you want to process

  FileReader reader = new FileReader(file.getAbsolutePath());
  pool.execute(reader);