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copied!<p>As suggested by <a href="http://www.coderanch.com/t/403914/java/java/do-read-entire-file-all" rel="nofollow noreferrer">Garrett Rowe and Stan James</a> you can use <code>java.util.Scanner</code>:</p> <pre><code>try (Scanner s = new Scanner(file).useDelimiter("\\Z")) { String contents = s.next(); } </code></pre> <p>or</p> <pre><code>try (Scanner s = new Scanner(file).useDelimiter("\\n")) { while(s.hasNext()) { String line = s.next(); } } </code></pre> <p>This code does not have external dependencies. Here is an example of how to use <code>java.util.Scanner</code> with correct resource and error handling:</p> <pre><code>import java.io.File; import java.io.FileNotFoundException; import java.util.Scanner; import java.util.Iterator; class TestScanner { public static void main(String[] args) throws FileNotFoundException { File file = new File(args[0]); System.out.println(getFileContents(file)); processFileLines(file, new LineProcessor() { @Override public void process(int lineNumber, String lineContents) { System.out.println(lineNumber + ": " + lineContents); } }); } static String getFileContents(File file) throws FileNotFoundException { try (Scanner s = new Scanner(file).useDelimiter("\\Z")) { return s.next(); } } static void processFileLines(File file, LineProcessor lineProcessor) throws FileNotFoundException { try (Scanner s = new Scanner(file).useDelimiter("\\n")) { for (int lineNumber = 1; s.hasNext(); ++lineNumber) { lineProcessor.process(lineNumber, s.next()); } } } static interface LineProcessor { void process(int lineNumber, String lineContents); } } </code></pre>

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