Main.java Source code

Introduction

Here is the source code for Main.java

Source

//package com.java2s;

import java.io.File;

import java.text.DecimalFormat;

public class Main {
    private static final String CACHE_MEASURE_FORMATE = "0.0";
    private static final int CACHESIZE0 = 1024;
    private static final int CACHESIZE1 = 1048576;
    private static final int CACHESIZE2 = 1073741824;
    private static double mCacheMeasure;

    /**
     * 
     * @Title: formatCacheMeasure: format files' measure
     * @Description: formatCacheMeasure
     * @param @param path
     * @param @return
     * @return String
     * @throws @param path
     * @throws @return
     */
    public static String formatCacheMeasure(String path) {
        String measure;
        DecimalFormat df = new DecimalFormat(CACHE_MEASURE_FORMATE);
        getCacheMeasure(path);
        if (mCacheMeasure == 0.0) {
            mCacheMeasure = 0;
            return null;
        } else if (mCacheMeasure < CACHESIZE1) {
            measure = df.format((double) mCacheMeasure / CACHESIZE0) + "K";
        } else if (mCacheMeasure < 1073741824) {
            measure = df.format((double) mCacheMeasure / CACHESIZE1) + "M";
        } else {
            measure = df.format((double) mCacheMeasure / CACHESIZE2) + "G";
        }
        mCacheMeasure = 0;
        return measure;
    }

    /**
     * 
     * @Title: getCacheMeasure: get the measure of all the files under the given
     *         path
     * @Description: getCacheMeasure
     * @param @param path: the given file path
     * @return void
     * @throws @param path
     */
    private static void getCacheMeasure(String path) {
        File[] allFiles = new File(path).listFiles();
        if (allFiles != null) {
            for (int i = 0; i < allFiles.length; i++) {
                if (allFiles[i].isDirectory()) {
                    getCacheMeasure(allFiles[i].getAbsolutePath());
                } else {
                    mCacheMeasure += allFiles[i].length();
                }
            }
        }
    }
}