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Welcome to Hexo! This is your very first post. Check documentation for more info. If you get any problems when using Hexo, you can find the answer in troubleshooting or you can ask me on GitHub. Quick StartCreate a new post1$ hexo new "My New Post" More info: Writing Run server1$ hexo server More info: Server Generate static files1$ hexo generate More info: Generating Deploy to remote sites1$ hexo deploy More info: Deployment

顺序结构 从上到下依次执行 是任何算法都离不开的一种基本算法结构 选择结构 “if” Single Selection Structure 12if (boolean){ ...} “if” Double Selection Structure 12if (boolean) { ...} else { ... } “if” Triple Selection Structure 123if (boolean) { ...} else if (boolean) { ...} else { ... } “if” Nested Selection Structure 123if (boolean) { if (boolean) { ... }} “switch” Triple Selection Structure

Scanner 对象 功能： 获取用户输入 基本语法 1Scanner s = new Scanner(System.in); next() 一定要读取有效字符后才可以结束输入 对输入有效字符之前遇到的空白，next()方法会自动将其去掉 只有输入有效字符后才将后面输入的空白作为分隔符或者结束符 next() 不能得到带有空格的字符串 nextLine() 以Enter为结束符，也就是说nextLine()方法返回的是输入回车之前的所有字符 可以获得空白 代码笔记​ https://git.sgxi.cn/ation_ciger/java_learn/src/branch/master/src/cn/sgxi/Scanner