exception

问题 So I'm trying to run a particular file called CountdownTree.java that inherits functions from a bunch of other files in the package comp2402a4. These were all starting files given by my instructor that I'm supposed to add to, and there shouldn't be any errors running these files. I compiled it using 'javac comp2402a4/CountdownTree.java' and it compiled fine with no problems. But when I try to run it using 'java comp2402a4/CountdownTree.java', I get the error: Exception in thread "main" java

问题 I am able to see exception message for if xpath is in try-except() block as self.driver.find_element_by_xpath() .But when I add explicit wait to element,the error message is blank, if the xpath is not present or wrong. How do I print the error message in except block? If I run this , for 1st one, able to prent e, next one is blank from selenium import webdriver from selenium.webdriver.common.by import By from selenium.webdriver.support.ui import WebDriverWait from selenium.webdriver.support

问题 I am able to see exception message for if xpath is in try-except() block as self.driver.find_element_by_xpath() .But when I add explicit wait to element,the error message is blank, if the xpath is not present or wrong. How do I print the error message in except block? If I run this , for 1st one, able to prent e, next one is blank from selenium import webdriver from selenium.webdriver.common.by import By from selenium.webdriver.support.ui import WebDriverWait from selenium.webdriver.support

问题 I have a function that handles errors via Either : funErrViaEither :: a -> Either SomeException b I want to use this function in another function that should be more flexible and return MonadThrow m : funErrViaThrow :: MonadThrow m => a -> m b funErrViaThrow x = if x = someCondition then funErrViaEither else throwM (SomeException MyCustomException) This does not compile; the type checker complains that the return type of funErrViaEither does not match the expected type m b . I don't

问题 I have a function that handles errors via Either : funErrViaEither :: a -> Either SomeException b I want to use this function in another function that should be more flexible and return MonadThrow m : funErrViaThrow :: MonadThrow m => a -> m b funErrViaThrow x = if x = someCondition then funErrViaEither else throwM (SomeException MyCustomException) This does not compile; the type checker complains that the return type of funErrViaEither does not match the expected type m b . I don't

问题 I have a xlsx file with a column containing Dates in the format: "01.01.1900 09:01:25". The file is password protected so I convert it to a dataframe by means of win32com.client library. Here is the code: import pandas as pd import win32com.client xlApp = win32com.client.Dispatch("Excel.Application") xlApp.DisplayAlerts = False xlwb = xlApp.Workbooks.Open(File, False, True, None, " ") #Open Workbook password " " xlws = xlwb.Sheets("Sheet 1") #Open Sheet 1 #Get table dimensions LastRow = xlws

问题 This question already has answers here : Scanner is skipping nextLine() after using next() or nextFoo()? (19 answers) Closed 3 years ago . This is my code import java.io.*; import java.util.*; class student { String name; int age; float cgpa; } public class getdata { public static void main(String args[]) throws IOException { Scanner in=new Scanner(System.in); int n; n=in.nextInt(); student[] s=new student[n]; for(int i=0;i<n;i++) { try { s[i]=new student(); s[i].name=in.nextLine(); in

问题 I've this exception of type System.AggregateException : Message = "One or more errors occurred." Source = null StackTrace = null It's InnerException is this System.Reflection.TargetInvocationException : Message = "Exception has been thrown by the target of an invocation." Source = "mscorlib" StackTrace = at System.RuntimeMethodHandle.InvokeMethod(Object target, Object[] arguments, Signature sig, Boolean constructor) at System.Reflection.RuntimeMethodInfo.UnsafeInvokeInternal(Object obj,

问题 I have created my own type of exception and want to implement it in a method. As of now I have written it in the following way, and it works. public Worker remove (String firstName, String lastName, String number) throws NoSuchEmployeeException { Worker w = null; for (int i = 0; i < list.size(); i++) { if (list.get(i).getFirstName().compareTo(firstName) == 0 && list.get(i).getLastName().compareTo(lastName) == 0 && list.get(i).getNumber().compareTo(number) == 0) { w = list.get(i); list.remove

问题 I am using for J2Mod java jar for my project. I am connected with the device through comport but, neither able to read nor write data into the device. Both time when I am trying to read or write data into the device getting the same exception. Whenever, Using QModMaster I am able to read data from the devices. Connection Code - SerialParameters parameters; SerialConnection serialMaster; try { parameters = new SerialParameters(); parameters.setPortName((String) jComboBox4.getSelectedItem()); /