Java IO 内容附加到文件

import java.io.File;
import java.io.FileWriter;
import java.io.BufferedWriter;
import java.io.IOException;

class AppendFileDemo
{
   public static void main( String[] args )
   {    
      try{
        String content = "This is my content which would be appended " +
            "at the end of the specified file";
        //Specify the file name and path here
        File file =new File("C://myfile.txt");

        /* This logic is to create the file if the
         * file is not already present
         */
        if(!file.exists()){
           file.createNewFile();
        }

        //Here true is to append the content to file
        FileWriter fw = new FileWriter(file,true);
        //BufferedWriter writer give better performance
        BufferedWriter bw = new BufferedWriter(fw);
        bw.write(content);
        //Closing BufferedWriter Stream
        bw.close();

    System.out.println("Data successfully appended at the end of file");

      }catch(IOException ioe){
         System.out.println("Exception occurred:");
         ioe.printStackTrace();
       }
   }
}

Data successfully appended at the end of file

This is the already present content of my file

This is the already present content of my fileThis is my content which 
would be appended at the end of the specified file

import java.io.File;
import java.io.FileWriter;
import java.io.PrintWriter;
import java.io.BufferedWriter;
import java.io.IOException;

class AppendFileDemo2
{
   public static void main( String[] args )
   {    
      try{
          File file =new File("C://myfile.txt");
          if(!file.exists()){
            file.createNewFile();
          }
          FileWriter fw = new FileWriter(file,true);
          BufferedWriter bw = new BufferedWriter(fw);
          PrintWriter pw = new PrintWriter(bw);
          //This will add a new line to the file content
          pw.println("");
          /* Below three statements would add three 
           * mentioned Strings to the file in new lines.
           */
          pw.println("This is first line");
          pw.println("This is the second line");
          pw.println("This is third line");
          pw.close();

      System.out.println("Data successfully appended at the end of file");

       }catch(IOException ioe){
           System.out.println("Exception occurred:");
           ioe.printStackTrace();
      }
   }
}

Data successfully appended at the end of file

This is the already present content of my file

This is the already present content of my file
This is first line
This is the second line
This is third line