Here you can find the source of Base64Decode(String str)
public static byte[] Base64Decode(String str) throws IOException
//package com.java2s; //License from project: Open Source License import java.io.IOException; import sun.misc.BASE64Decoder; public class Main { public static byte[] Base64Decode(String str) throws IOException { return new BASE64Decoder().decodeBuffer(str); }//from w ww.java 2s. c o m }