写出将字符串中的数字转换为整型的方法,如:"as31d2v"->312,并写出相应的单元测试,输入超过int范围时提示不合法输入. public struct ConvertResult { public ConvertState State; public int Number; } public enum ConvertState { // 输入不合法 InValid = , // 输入合法 Valid = } public class StringHelper { publ…
不说废话,贴代码: CREATE OR REPLACE FUNCTION to_time(sec IN NUMBER) RETURN VARCHAR2 IS /*把秒转成时分秒格式 auth lzpong 201/09/16 */ BEGIN ))), ,); EXCEPTION WHEN OTHERS THEN RETURN '0:00:00'; END to_time; CREATE OR REPLACE FUNCTION isnumeric(str IN VARCHAR2) RETURN…
import org.junit.Test; import java.util.regex.Matcher; import java.util.regex.Pattern; public class RegexTest { @Test public void test(){ String line = "This order was placed for QT3000! OK?"; String pattern = "\\d+"; // Create a Patte…
字符串必须是数字,不要超过转换成目标数字类型的范围.超过的话系统也会报错(溢出). static void Main(string[] args) { string s; int i; Console.WriteLine("please enter a number"); s = Console.ReadLine(); i = Int32.Parse(s); Console.WriteLine(i + ); Console.WriteLine(); Console.WriteLine(…
public class StringDemo{ public static void main(String args[]){ String str ="12343264sd6223"; if (isNumber(str)){ System.out.println("字符串由数字组成!"); } else { System.out.println("字符串由非数字组成!"); } } public static boolean isNumber…
