如下简单java程序为啥有错？如下简单java程序，从键盘读取一个字符，然后输出。在Eclipse的console中却输去下面的错误源代码：publicclassHelloJava{ publicstaticvoidmain(String[]args){ intb=System.in.read(); System.out.println("b="+b); System.out.print...

oracle写定时任务出现的问题createorreplaceprocedureproc_testasbegininsertintoaa(id)selecta.id,sysdatefroma;end;declarejob_numnumber;begindbms_job.submit(job_num,'proc_test;',SYSDATE,'sysdate+2/24/60');end;问题在行:8...

ORACLE变量定义问题DECLARESNVARCHAR2(50);SN1VARCHAR2(50);SN2VARCHAR2(50);SETSN=(SELECTSER_NOFROMUPLOADWHEREFILE_NAME='大堂经理.wav');SETSN1=(SELECTSER_NOFROMUPLOADWHEREFILE_NAME='大堂经理(粤).wav');SETSN2=SN+'@'+SN1;...

createorreplacepackagebody存储过程编译时总报错createorreplacepackagebodyPKG_GD_STUDENTINFOisprocedureMP_EL_INFORMisbegindeclarev_update_sqlvarchar2(1000):='';end;endMP_EL_INFORM;endPKG_GD_STUDENTINFO;==========...

createorreplacepackagebody存储过程编译时总报错createorreplacepackagebodyPKG_GD_STUDENTINFOisprocedureMP_EL_INFORMisbegindeclarev_update_sqlvarchar2(1000):='';end;endMP_EL_INFORM;endPKG_GD_STUDENTINFO;==========...

希望解决一个问题你好请问这个问题怎么解决oracle做的网上选课系统当我看见一片博客用触发器来控制一个课程允许多少个人去修你的代码如下CREATETRIGGERtri_takecourseONtb_stucourseFORINSERT,UPDATEASIF(SELECTCOUNT(*)FROMtb_stucourse,insertedWHEREtb_stucourse.CourseNum=inse...

求助oracle定义sql函数createorreplacefunctiongetTerm(username_newvarchar2(32))returnvarchar2(10)asbeginresultvarchar2(10);termnumber:=1;yearCodevarchar2(10):=substr(username_new,4,2);semesterCodevarchar2(10)...

写了个存储过程出问题了求高手看下Select*Fromjobs;CREATEORREPLACEProcedureconn_pro(v_IdInVarchar2,v_titleInVarchar2)AsDeclareTyper_typeIsRecord(v_myIdjobs.job_id%Type,v_titlejobs.job_title%Type);v_r1r_type;Cursormycurs...

关于过程报错createorreplacePROCEDURE"TAOCAN_OPERATOR"AStemp_countNUMBER(10);beginformdcin(selectphonecc,tctypefromtaocantestwheretctype='6'ortctype='10'ortctype='16')loopse...

过于父类之类的问题Ba=newA(),A是父类，B是子类，为什么不能这么写，系统提示的错误是Typemismatch:cannotconvertfromAtoB,这是一个类型转换的过程吗,求解求解color='#FF8000'>------解决思路----------------------举个例子：java中所有的类的超类都是Object难道newObject();的引用能随便使用一个子类的引用...

说是内存溢出，我看怎么不像谁看看这到底是怎么回事，这是控制台的异常片段：信息:AtleastoneJARwasscannedforTLDsyetcontainednoTLDs.EnabledebugloggingforthisloggerforacompletelistofJARsthatwerescannedbutnoTLDswerefoundinthem.SkippingunneededJAR...

电脑死机后伟福打开后全是乱码。#include<main.h>/*********************************************************************//**//**串口信号切换函数**//**//*********************************************************************...

VHDL初学者遇到的编译不通过的问题，请求大家帮助。libraryieee;useieee.std_logic_1164.all;entityCOUNTERisport(clk: instd_logic; rs: instd_logic; count_out:outstd_logic_vector(2downto0);endCOUNTER;architecturebehavofCOUNTERiss...

为什么答案是B，Given:11.publicclassPerson{12.privatename;13.publicPerson(Stringname){14.this.name=name;15.}16.publicbooleanequals(Objecto){17.if(!oinstanceofPerson)returnfalse;18.Personp=(Person)o;19.returnp...

一些java试题,有疑惑不解地方,请教.先发几个,后面还会有.1=================================11.publicStringmakinStrings(){12.Strings=“Fred”;13.s=s+“47”;14.s=s.substring(2,5);15.s=s.toUpperCase();16.returns.toString();17.}Howman...

看看这个面试题！！！！1.publicclasstest{2.publicstaticvoidmain(Stringargs[]){3.classFoo{4.publicinti=3;5.}6.Objecto=(Object)newFoo();7.Foofoo=(Foo)o;8.System.out.println("i="+foo.i);9.}10.}A.i=3;B.Comp...

请高手指教！基础知识问题，谢谢！！publicclassLocationTest{ /** *@paramargs */ publicstaticvoidmain(String[]args){ //TODOAuto-generatedmethodstub Locationl1=newLocation(1.0,1.0); Locationl2=newLocation(0.0,0.0); //...

asp.net添加信息时候出错usingSystem;usingSystem.Data;usingSystem.Configuration;usingSystem.Collections;usingSystem.Web;usingSystem.Web.Security;usingSystem.Web.UI;usingSystem.Web.UI.WebControls;usingSystem.Web...

asp.net添加信息时候出错usingSystem;usingSystem.Data;usingSystem.Configuration;usingSystem.Collections;usingSystem.Web;usingSystem.Web.Security;usingSystem.Web.UI;usingSystem.Web.UI.WebControls;usingSystem.Web...

QT编译出现qt/mainwindow.cpp:1:21:fatalerror:QtWidgets:Nosuchfileordirector我在编译QT应用时出现：qt/mainwindow.cpp:1:21:fatalerror:QtWidgets:Nosuchfileordirectory,请问如何解决，本人也网上搜索过了多次，都没见到可行方法，QT版本4.8.1，由于本为是新手学QT，所以麻...