Main.java Source code

Introduction

Here is the source code for Main.java

Source

//package com.java2s;

public class Main {
    public static boolean checkGpgga(String checkString) {
        if (!checkString.contains("*"))
            return false;
        if (checkString.indexOf("*") + 4 > checkString.length())
            return false;
        String checkMain = checkString.substring(checkString.indexOf("*") + 1, checkString.indexOf("*") + 3);
        String bufferString = getCheckNum(checkString);
        if (checkMain == null || bufferString == null)
            return false;
        return checkMain.toUpperCase().equals(bufferString.toUpperCase());
    }

    public static String getCheckNum(String ggaString) {
        if (!ggaString.contains("$") || !ggaString.contains("*"))
            return null;
        String test = ggaString.substring(ggaString.indexOf("$") + 1, ggaString.indexOf("*"));
        char result = test.charAt(0);
        for (int i = 1; i < test.length(); i++)
            result ^= test.charAt(i);
        String bufferString = Integer.toHexString(result);
        if (bufferString.length() == 1)
            bufferString = "0".concat(bufferString);
        return bufferString;
    }
}