read and write in java

I want print in the file every time line
But every time i want print a new line printed on the same line the old.

I want to print lines in the file

This my code

         BufferedReader read = new BufferedReader(new FileReader (SecurityScreen.path.get("ScoreFile")));
          FileWriter file ;
       BufferedWriter write = new BufferedWriter ( new FileWriter(SecurityScreen.path.get("ScoreFile")));
       String temp = "" ;
       String output = "";
       String newLine = System.getProperty("line.separator");
 String score= SecurityScreen.getPlayer() + "@" +gameTime + newLine;
 //    if(read.readLine()==null){
 //       write.write(score);
 //          }
               try{
                     if((temp = read.readLine()) != null){
 
                  while (true) {
                          output += temp + newLine;
                         file = new FileWriter(SecurityScreen.path.get("ScoreFile"));
                         //write = new BufferedWriter(file);
                         write.write(output + newLine) ; 
                          //score =   SecurityScreen.getPlayer() + "@" +gameTime ;
                         write.write(score) ;
               }
                }
                 else {
                      write.write(score);
                 }
 
                  write.close(); 
               }catch(IOException e){
 
               }
 

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