file input java code example

Example 1: java read text file

// java read text file example code
import java.io.BufferedReader;
import java.io.File;
import java.io.FileReader;
import java.io.IOException;
public class JavaReadTextFileUsingBufferedReader
{
   public static void main(String[] args) throws IOException
   {
      File fl = new File("B:\\demo.txt");
      BufferedReader br = new BufferedReader(new FileReader(fl));
      String str;
      while((str = br.readLine()) != null)
      {
         System.out.println(str);
      }
      br.close();
   }
}

Example 2: input file in java

import java.io.*;
public class CopyFile {

   public static void main(String args[]) throws IOException {  
      FileInputStream in = null;
      FileOutputStream out = null;

      try {
         in = new FileInputStream("input.txt");
         out = new FileOutputStream("output.txt");
         
         int c;
         while ((c = in.read()) != -1) {
            out.write(c);
         }
      }finally {
         if (in != null) {
            in.close();
         }
         if (out != null) {
            out.close();
         }
      }
   }
}