get File Size - Java java.io

Java examples for java.io:File Size

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Description

get File Size

Demo Code


//package com.java2s;

public class Main {
    private static final int KB = 1024;
    private static final int MB = 1024 * 1024;
    private static final int GB = 1024 * 1024 * 1024;

    public static String getFileSize(long size) {
        if (size <= 0) {
            return "0KB";
        }//  www . ja  v a 2  s  .  c o  m
        StringBuffer sb = new StringBuffer();
        int currentSize = 0;
        int remainderSize = 0;
        if (size >= GB) {
            currentSize = (int) (size / GB);
            if (currentSize > 0) {
                sb.append(String.valueOf(currentSize));
                sb.append(".");
            }
            remainderSize = (int) (size % GB);
            currentSize = (int) (remainderSize / MB);
            if (currentSize > 0) {
                sb.append(String.valueOf(currentSize));
            }
            remainderSize = (int) (size % MB);
            currentSize = (int) (remainderSize / KB);
            if (currentSize > 0) {
                sb.append(String.valueOf(currentSize));
            }
            sb.append("GB");
        } else if (size >= MB) {
            currentSize = (int) (size / MB);
            if (currentSize > 0) {
                sb.append(String.valueOf(currentSize));
                sb.append(".");
            }
            remainderSize = (int) (size % MB);
            currentSize = (int) (remainderSize / KB);
            if (currentSize > 0) {
                sb.append(String.valueOf(currentSize));
            }
            sb.append("MB");

        } else if (size >= KB) {
            currentSize = (int) (size / KB);
            if (currentSize > 0) {
                sb.append(String.valueOf(currentSize));
            }
            sb.append("KB");
        } else {
            sb.append(size + "Byte");
        }
        return sb.toString();
    }
}

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