File concatenation : File Commands « File Input Output « Java






  1. Java
  2. File Input Output
  3. File Commands

File concatenation

    

import java.io.FileNotFoundException;
import java.io.IOException;
import java.io.RandomAccessFile;

public class Cat {
  public static void concatenate(String fileName) {
    RandomAccessFile file = null;
    String line = null;

    try {
      file = new RandomAccessFile(fileName, "r");
      while ((line = file.readLine()) != null) {
        System.out.println(line);
      }
      return;
    } catch (FileNotFoundException fnf) {
      System.err.println("File: " + fileName + " not found.");
    } catch (Exception e) {
      System.err.println(e.toString());
    } finally {
      if (file != null) {
        try {
          file.close();
        } catch (IOException io) {
        }
      }
    }

  }

  public static void main(String[] args) {
    for (int i = 0; i < args.length; i++)
      Cat.concatenate(args[i]);
  }
}








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