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POText-based loading bar when running Java in command prompt?
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copied!<p>I was just wondering if there was a way to use <code>System.out.println();</code> or other methods to create a cool loading bar when I run my program with a batch file.</p> <p>The real question here is how I can make this bar appear as if it's printing on only one line.</p> <p>I don't want it to be spread over multiple lines like below:</p> <pre><code>[aaaaaccccccccccccccc] 25% [aaaaaaaaaacccccccccc] 50% [aaaaaaaaaaaaaaaccccc] 75% </code></pre> <p>One that stays cleanly in place would make things cleaner and friendlier.</p> <p>Many thanks,</p> <p>Justian</p> <p><strong>EDIT:</strong></p> <p>Ok. I managed to find this link here: <a href="https://stackoverflow.com/questions/60221/how-to-animate-the-command-line">How to animate the command line?</a>, but the answer:</p> <ol> <li>Is for C++, not Java</li> <li>Doesn't seem very efficient in Java, having to backspace each line in a loop?</li> </ol> <p>Is there a better way to do this in Java?</p> <p><strong>EDIT:</strong></p> <p>Here's what I ended up going with:</p> <pre><code>static final int PROGRESSBAR_LENGTH = 20; public static void drawProgressBar(int numerator, int denominator) { int percent = (int) (((double) numerator / (double) denominator) * 100); String bar = "["; int lines = round((PROGRESSBAR_LENGTH * numerator) / denominator); int blanks = PROGRESSBAR_LENGTH - lines; for (int i = 0; i < lines; i++) bar += "|"; for (int i = 0; i < blanks; i++) bar += " "; bar += "] " + percent + "%"; System.out.print(bar + "\r"); } private static int round(double dbl) { int noDecimal = (int) dbl; double decimal = dbl - noDecimal; if (decimal >= 0.5) return noDecimal + 1; else return noDecimal; } </code></pre> <p>Sample output:</p> <p><code>[||||||||||||||||....] 80%</code> (.'s = spaces)</p>

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