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convert byte array to Hex String. @param info - the propmt String @param buf - the byte array which will be converted @return Hex String

convert byte array to Hex String. @param buf - the byte array which will be converted @param offset - the start position of buf @param length - the c

Format buffer into the designated width and height, for example: bufferString = "123456789012345678901234567890" width = 16 , height = 0 String[] = {

convert two bytes to int, in fact return int for represent unsigned short. @param convertByte-byte stream @return int number

convert four bytes to int. @param convertByte - byte stream @return int number

Method converting byte array into int. @param The byte array to be converted.

Method converting byte array into long. @param The byte array to be converted.

Center allign the string in specified digits @param item String to be allign @param digits number of characters @return formate

copy file @param src @param desc @return

delete file @param desc @return

DownLoad file @param url @return

Method fill space , converted String length to LCD_WIDTH @param The string to be format.

Method fill string @param The string to be format.

Method Format string @param The string to be format.

This method splits date in the String array and return it . @param date - date in the string format @return String[]

Fit the original string to the page @param matter - input data @param lineSize - display width @param isBeginWithSpace - true if begin with space- @r

Method Format string @param The string to be format.

this method gives only last 4 digit of card number preceding with . @param ccNum card number @return string