Question

I have to read txt files in my program. Im currently using FileReader and BufferedReader. I tried to use Scanner but its slower than FileReader and BufferedReader. Is there any class, which can read files faster ? It must be written in Java Language.

I need to read all words(strings splited by white space) from text file

Answer 1

If the files being read is huge then you would want to use BufferedReader on top of a FileReader to improve read performance.

or you may try something likethis:-

 BufferedReader br = new BufferedReader(new FileReader("file.txt"));
try {
    StringBuilder sb = new StringBuilder();
    String line = br.readLine();

    while (line != null) {
        sb.append(line);
        sb.append("\n");
        line = br.readLine();
    }
    String everything = sb.toString();
   } finally {
    br.close();
}

or you can try this program. It works faster for larger files:-

public String readDoc(File f) {
String text = "";
int read, N = 1024 * 1024;
char[] buffer = new char[N];

try {
    FileReader fr = new FileReader(f);
    BufferedReader br = new BufferedReader(fr);

    while(true) {
        read = br.read(buffer, 0, N);
        text += new String(buffer, 0, read);

        if(read < N) {
            break;
        }
    }
} catch(Exception ex) {
    ex.printStackTrace();
}

return text;
}