(1) 理解异常的使用和自定义异常类的方法。 (2) 理解throw和throws的区别和联系。 -(1) understand the use of abnormal and unusual type of custom method. (2) to understand the difference between throw and throws and contact.

/**/// / // / 转全角的函数(SBC case) // / // /任意字符串 // /全角字符串 // / // /全角空格为12288，半角空格为32 // /其他字符半角(33-126)与全角(65281-65374)的对应关系是：均相差65248 -/**/////// Switch to all-angle function (SBC case)////// any string///full-width string//////

简单程序的编写，要求输入两个整数，输出这两个整数的和、差、积、商-Simple program written input two integers, and the output of these two integers, difference, product, business

JDK和JRE的区别，给初学者帮助应该不小-The difference between JDK and JRE to help beginners should not be small ~~~~~~~~~~~~~~~~~~~~~~