Main.java Source code

Introduction

Here is the source code for Main.java

Source

//package com.java2s;

public class Main {
    private static final long K = 1024;
    private static final long M = K * K;
    private static final long G = M * K;
    private static final long T = G * K;

    public static String convertToStringRepresentation(final long value) {
        final long[] dividers = new long[] { T, G, M, K, 1 };
        final String[] units = new String[] { "TB", "GB", "MB", "KB", "B" };
        if (value < 1)
            throw new IllegalArgumentException("Invalid file size: " + value);
        String result = null;
        for (int i = 0; i < dividers.length; i++) {
            final long divider = dividers[i];
            if (value >= divider) {
                result = format(value, divider, units[i]);
                break;
            }
        }
        return result;
    }

    private static String format(final long value, final long divider, final String unit) {
        final double result = divider > 1 ? (double) value / (double) divider : (double) value;
        return String.format("%.1f %s", Double.valueOf(result), unit);
    }
}