CODEWITHSUNDEEP
javafilefile-io
Taobitz
Taobitz

Reputation: 556

Java IO Create / Append File

Im trying to create a file if it doesnt exist, if it does exist append to it. Is this the best way to do it? Im not sure having two try catches inside one method is good personally? 

   public static void main(String [] args)
    {
        String fileLocation = "/temp/";
        String name = "Bob";
        String timeStamp = "1988-03-15";
        Path path = Paths.get(fileLocation+ "info.log");

        if(!Files.exists(path)){
            try {
                Files.createFile(path);
            } catch (IOException e) {
                e.printStackTrace();
            }
        }

        try (BufferedWriter writer = Files.newBufferedWriter(path, StandardCharsets.UTF_8, StandardOpenOption.APPEND)) {
            SimpleDateFormat tTimeFormatter = new SimpleDateFormat("yyyy/MM/dd HH:mm:ss:SSS");
            writer.write(tTimeFormatter.format(System.currentTimeMillis()) + " name: " + name + " Timestamp: "+ timeStamp);
            writer.newLine();
        } catch (IOException e) {
          System.out.print(e.getStackTrace());
        }
    }

Upvotes: 1

Views: 2050

Answers (3)

Rupesh
Rupesh

Reputation: 388

The File.createNewFile() method creates a new, empty file named by this abstract pathname if and only if a file with this name does not yet exist. This methods return a true value if the file is created successfully and false if the file already exists or the operation failed.

if (myFile.createNewFile()){
    System.out.println("File is created!");
   }else{
    System.out.println("File already exists.");
   }

Upvotes: 1

JamesEpicGuru
JamesEpicGuru

Reputation: 21

Try using the printWriter class like this

java.io.PrintWriter p = new java.io.PrintWriter(yourFileHere);
// You can use println to print a new line if it allready exists
p.println(yourTextHere);
// Or append to the end of the file
p.append("TEXT HERE!!!!")

Upvotes: 0

eg04lt3r
eg04lt3r

Reputation: 2610

You can write to file with StandardOpenOptions: CREATE and APPEND.

Files.write(Paths.get(""), new byte[] {}, StandardOpenOption.CREATE, StandardOpenOption.APPEND);

CREATE - means if file doesn't exists it creates new one otherwise get existing. APPEND - means append new data to existing content in file.

So, you can do all your operations with a single line.

Upvotes: 5

Related Questions