classcastexception

问题 I have been trying in vain to implement tomcat 9's jakarta servlet as opposed to the previous javax.servlet implementation (as its my understanding that the jakarta package is the way forward). The issue is that when I point the browser at my servlet's url I get the following error(s)... java.lang.ClassCastException: class cti.nm.web.Index cannot be cast to class javax.servlet.Servlet (cti.nm.web.Index is in unnamed module of loader org.apache.catalina.loader.ParallelWebappClassLoader

问题 I'm trying make an automation test in Selenium WebDriver, but Eclipse is showing me the following error: java.lang.ClassCastException: java.base/java.lang.String cannot be cast to org.openqa.selenium.WebElement Here is my code: public void SeachApp() { Object elem = driver.getPageSource().contains("Staffing"); if (elem != null) { System.out.println("Encontrado"); int width = ((WebElement) elem).getSize().getWidth(); Actions act = new Actions(driver); act.moveToElement((WebElement) elem)

问题 I'm trying make an automation test in Selenium WebDriver, but Eclipse is showing me the following error: java.lang.ClassCastException: java.base/java.lang.String cannot be cast to org.openqa.selenium.WebElement Here is my code: public void SeachApp() { Object elem = driver.getPageSource().contains("Staffing"); if (elem != null) { System.out.println("Encontrado"); int width = ((WebElement) elem).getSize().getWidth(); Actions act = new Actions(driver); act.moveToElement((WebElement) elem)

问题 In implementation of a generic stack ,the following idiom is used and works without any problem public class GenericStack<Item> { private int N; private Item[] data; public GenericStack(int sz) { super(); data = (Item[]) new Object[sz]; } ... } However when I try the following ,it causes a ClassCastException String[] stra = (String[]) new Object[4]; Exception in thread "main" java.lang.ClassCastException: [Ljava.lang.Object; cannot be cast to [Ljava.lang.String; How do you explain this? 回答1:

问题 In implementation of a generic stack ,the following idiom is used and works without any problem public class GenericStack<Item> { private int N; private Item[] data; public GenericStack(int sz) { super(); data = (Item[]) new Object[sz]; } ... } However when I try the following ,it causes a ClassCastException String[] stra = (String[]) new Object[4]; Exception in thread "main" java.lang.ClassCastException: [Ljava.lang.Object; cannot be cast to [Ljava.lang.String; How do you explain this? 回答1:

问题 The compiler is throwing ClassCastException: String cannot cast be to an int on line 96 of the below. I cannot for the life of me figure out why, and any help would be really appericiated. code: public class Progress extends Activity { private TextView names, current, goal, start; private EditText updateBox; private ProgressBar progress; private String currentWeight, goalS, startS; private int currentWeightInt, weightUpdate; protected void onCreate(Bundle savedInstanceState) { super.onCreate

问题 This question already has answers here : Convert ArrayList<String> to String[] array [duplicate] (6 answers) Convert list to array in Java [duplicate] (11 answers) Closed 7 years ago . List<String> list = getNames();//this returns a list of names(String). String[] names = (String[]) list.toArray(); // throws class cast exception. I don't understand why ? Any solution, explanation is appreciated. 回答1: This is because the parameterless toArray produces an array of Object s. You need to call the

问题 i am using a BaseExpandableListAdapter as follows. where instead of passing a list, i am directly passing a View to be a child data. and the child count is always returned as 1. as there is only one view per heading. public class TaxAdapter extends BaseExpandableListAdapter{ private Context _context; private ArrayList<String> _listDataHeader; private HashMap<String, View> _listDataChild; public TaxAdapter(Context context, ArrayList<String> taxListDataHeader, HashMap<String, View>

问题 i am using a BaseExpandableListAdapter as follows. where instead of passing a list, i am directly passing a View to be a child data. and the child count is always returned as 1. as there is only one view per heading. public class TaxAdapter extends BaseExpandableListAdapter{ private Context _context; private ArrayList<String> _listDataHeader; private HashMap<String, View> _listDataChild; public TaxAdapter(Context context, ArrayList<String> taxListDataHeader, HashMap<String, View>

问题 Since MIUI 11/12 Use Its Own Custom Implementation of Dark Mode, using below code results in ClassCastException and Activity Life Cycle Exception, as DefaultNightMode and LocalNightMode is always Unspecified i.e. -100 instead of 0 or 1. If anyone has built a workaround for Xiaomi Devices specially for MIUI 11/12. Please Help Me Out On this. Code Used: AppCompatDelegate.setDefaultNightMode(AppCompatDelegate.MODE_NIGHT_NO); this.recreate(); Error Caused: 2020-10-25 07:04:43.626 9167-9167/com