Output without overwriting

Question

Is it possible to write text to a file without overwriting previous data?

What I have done always is:

StringBuffer sb = new StringBuffer();
BufferedReader in;
PrintWriter out;

try{
    in = new BufferedReader( new FileReader("somefile.txt"));
    out = new PrintWriter( new FileWriter("somefile.txt"));

    String input = "";
    while(input != null){
        sb.append(input + "\n");
        input = in.readLine();
    }
    in.close()

    out.print(sb.toString());

    // now start doing what I want.

Is this the correct way?

score 2 · Answer 1 · answered Nov 04 '12 at 01:29

2

Check out the FileWriter API. There's a constructor that accepts a boolean parameter -- you may wish to use it.

answered Nov 04 '12 at 01:29

Hovercraft Full Of Eels

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score 2 · Accepted Answer · answered Nov 04 '12 at 01:29

2

You can use the append mode for FileWriter to avoid overwriting existing data:

new PrintWriter( new FileWriter("somefile.txt", true));

answered Nov 04 '12 at 01:29

Reimeus

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Output without overwriting

2 Answers2