Question

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How to append data to a file?

Quick question here, how can I update an exist file in java? when I open the file like this:

 try {
              File inFile = new File("scores.txt");
              BufferedReader br = new BufferedReader(new InputStreamReader(
                  new FileInputStream(inFile)));

all the former content of the file is deleted. but I dont want it to be deleted because I need this information. thanks alot.

Answer 1

(In the absence of the actual code that writes and based on the use of FileInputStream)

Use one of the two argument constructors of FileOutputStream who’s second argument is a boolean indicating if the file should be appended to, rather that overwritten:

try
{
    BufferedWriter bw = new BufferedWriter(new OutputStreamWriter(
        new FileOutputStream("scores.txt", true)));
                                         //^^^^ means append