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The source code is released under:
MIT License
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package com.androidbook.parse; // www. j a va2 s .c om public class StringUtils { public static boolean invalidString(String s) { return !validString(s); } public static boolean validString(String s) { if (s == null) { return false; } if (s.trim().equalsIgnoreCase("")) { return false; } return true; } }