progress bar

progress.java

// cursor moving
// http://www.tldp.org/HOWTO/Bash-Prompt-HOWTO/x361.html
static void updateProgress(int currentIndex, int total) {
    final int width = 25; // progress bar width in chars
    float percentage =  (float) currentIndex / (float) total;
    int currProgress = (int) Math.floor(percentage * width);
    int remainProgress = width - currProgress;
    String numCurr = new String(new char[currProgress]).replace("\0", "=");
    if (numCurr.length() > 0)
        numCurr = numCurr.substring(0, numCurr.length() - 1) + ">";
    String numRemain = new String(new char[remainProgress]).replace("\0", " ");
    System.out.print("\33[2A\r[" + numCurr +  numRemain + "]  " + currentIndex + " of " + total + " (" + ((int) Math.floor(percentage * 100)) + "%)\n\n");
}