How to copy file in java with example

Here is the example of copying file in java. This example will copy file and its content from one file to another.

import java.io.File;
import java.io.FileInputStream;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
 
public class CopyFileExample 
{
    public static void main(String[] args)
    { 
     InputStream inStream = null;
     OutputStream outStream = null;
     try
     {
         File fileOne =new File("D:\\db\\fileTest\\file2.txt");
         File fileTwo =new File("D:\\db\\fileTest\\file3.txt");
 
         inStream = new FileInputStream(fileOne);
         outStream = new FileOutputStream(fileTwo);
 
         byte[] buffer = new byte[1024];
          int length;
          
         //start copy file content in bytes 
         while ((length = inStream.read(buffer)) > 0)
         {
          outStream.write(buffer, 0, length);
         }
         inStream.close();
         outStream.close();
 
         System.out.println("File copied successfully");
     }
     catch(IOException e)
     {
      e.printStackTrace();
     }
    }
}