标题: Integer.parseInt(String)会抛出异常吗? [打印本页] 作者: 我笨故我学 时间: 2004-06-02 18:56 标题: Integer.parseInt(String)会抛出异常吗? 一般在jsp文件中是使用
int id=Integer.parseInt(request.getParameter("id");
来获得id号的 ,但是有人说这个会抛出异常,需要捕获,请教是否会抛出异常,
或者告知这相关的资料到哪里查？
谢谢指教.作者: 雨中漫步 时间: 2004-06-02 19:23 标题: Integer.parseInt(String)会抛出异常吗? 如果request.getParameter("id"返回的是字符串，不是整数，肯定有异常的
JAVA基础都有说明的作者: sakulagi 时间: 2004-06-03 07:21 标题: Integer.parseInt(String)会抛出异常吗? http://java.sun.com/j2se/1.4.2/docs/api/index.html
每个函数抛出的异常都有说明。作者: 我笨故我学 时间: 2004-06-03 12:19 标题: Integer.parseInt(String)会抛出异常吗? 谢谢
parseInt
public static int parseInt(String s)
throws NumberFormatExceptionParses the string argument as a signed decimal integer. The characters in the string must all be decimal digits, except that the first character may be an ASCII minus sign '-' ('\u002D') to indicate a negative value. The resulting integer value is returned, exactly as if the argument and the radix 10 were given as arguments to the parseInt(java.lang.String, int) method.
Parameters:
s - a String containing the int representation to be parsed
Returns:
the integer value represented by the argument in decimal.
Throws:
NumberFormatException - if the string does not contain a parsable integer.
);