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题目： Given a 2d grid map of '1's (land) and '0's (water), count the number of islands. An island is surrounded by water and is formed by connecting adj 阅读全文
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题目： Given a string which consists of lowercase or uppercase letters, find the length of the longest palindromes that can be built with those letters. 阅读全文
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加载驱动程序： Class.forName(driverClass) //加载MySql驱动 Class.forName("com.mysql.jdbc.Driver") //加载Oracle驱动 Class.forName("oracle.jdbc.driver.OracleDriver") 获得 阅读全文