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    <pre><code>public String readFile() { File f = new File("/Users/Guest/Documents/workspace/Project/src/test.txt"); FileReader fr = null; BufferedReader br = null; StringBuilder content = new StringBuilder();; try { fr = new FileReader(f); br = new BufferedReader(fr); //int c; //while ((c = fr.read()) != -1) { //content.append((char) c); //} String line = null; while((line = br.readLine()) != null) { content.append(line); } fr.close(); br.close(); } catch (Exception e) { // do something } return content.toString(); } </code></pre> <p>Use buffered reader and youll get 70%+ improvement, use string builder instead of string buffer unless you need syncronization.</p> <p>ran it on a 10MB file 50 times and averaged </p> <ul> <li>no need to put anything that does not need exception handling inside try</li> <li>no need for that if clause because it will be true only once and so you're wasting time - checking it for every character</li> <li>there is no runtime exceptions to throw.</li> </ul> <p>results: fastest combination to slowest:</p> <ol> <li>string builder and buffered reader line by line: 211 ms </li> <li>string buffer and buffered reader line by line: 213 ms </li> <li>string builder and buffered reader char by char: 348 ms </li> <li>string buffer and buffered reader char by char: 372 ms </li> <li>string builder and file reader char by char: 878 </li> <li>string buffer and file reader char by char: 935 ms</li> <li>string: extremely slow</li> </ol> <p>so use string builder + buffered reader and make it read line by line for best results.</p>
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    1. POFilereader null declarations and appending best practice
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    1. CO@StephenC, agreed! left it there from testing wrong file path :)
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