How to show percentage progress of a downloading file in java console(without UI)?

Question

My part of java code is below.

while (status == DOWNLOADING) {
    /* Size buffer according to how much of the
       file is left to download. */
                   


        

Answer 1

This is a simple "progress bar" concept.

Basically it uses the \b character to backspace over characters previously printed to the console before printing out the new progress bar...

public class TextProgress {

    /**
     * @param args the command line arguments
     */
    public static void main(String[] args) {
        System.out.println("");
        printProgress(0);
        try {
            for (int index = 0; index < 101; index++) {
                printProgress(index);
                Thread.sleep(125);
            }
        } catch (InterruptedException ex) {
            Logger.getLogger(TextProgress.class.getName()).log(Level.SEVERE, null, ex);
        }
    }

    public static void printProgress(int index) {

        int dotCount = (int) (index / 10f);
        StringBuilder sb = new StringBuilder("[");
        for (int count = 0; count < dotCount; count++) {
            sb.append(".");
        }
        for (int count = dotCount; count < 10; count++) {
            sb.append(" ");
        }
        sb.append("]");
        for (int count = 0; count < sb.length(); count++) {
            System.out.print("\b");
        }
        System.out.print(sb.toString());

    }
}

It won't work from within most IDE's, as Java's text components don't support the \b character, you must run from the terminal/console