Error invoking method перевод

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Invoke error: перевод, синонимы, произношение, примеры предложений, антонимы, транскрипция

У меня возникает эта ошибка: попытка вызвать виртуальный метод «java.lang.String android.os.Bundle.getString (java.lang.String)» для нулевой ссылки на объект

У меня есть эта проблема .

Это мой Halaplaymatches Класс:

Вы можете сделать это так. Прежде чем присваивать значение имени, проверьте, содержит ли пакет ваш ключ «заголовок».

Спасибо за ответ. Но у меня такая же ошибка

Я отредактировал свой ответ. Пожалуйста, попробуйте с этим условием и дайте мне знать.

Теперь есть ошибка для ContainsKey : ссылка на нулевой объект

И у меня есть еще 3 таких действия с тем же кодом, просто измените какой-то ключ. И была такая же ошибка, но я получаю свои данные с помощью ключа. И здесь этого не происходит.

в этом случае просто проверьте, получаете ли вы что-нибудь в дополнение к своему пакету.

да, я получил свой титул, на самом деле я тоже получаю свой титул здесь. Но когда я пытаюсь получить данные из заголовка через jsonarray nd jsonobject nd volley, это также ничего не дает мне в это время. Итак, я отлаживаю это действие, а затем оно показывает мне эту ошибку, затем я проверяю другое действие, но была и такая же ошибка, но она дает мне данные, которые я хочу

Спасибо. Это решено, но это дает мне ноль вместо моего заголовка.

это потому, что вы, возможно, не храните дополнения в «заголовке» в качестве ключа

ммм, я не понимаю этого извините

откуда вы звоните в класс «Halaplaymatches»

Вызов метода для объекта означает вызов метода для этого объекта; например, «Hello World».length() вызывает метод length для String со значением «Hello World» .

Как говорится в сообщении об ошибке, bundle должно быть null в строке name = bundle.getString(«title»); , если это строка 56.

Если вы отметите документация, это произойдет, когда в намерение с putExtras() не было добавлено никаких дополнений.

Нет, я добавил putExtras() Вот код: Намерение намерения=новое намерение(getContext(),HalaplayMatches.class); намерение.putExtra(«название»,name.get(position).trim()); startActivity(намерение);

Я знаю, что означает сообщение Java; Я просто читал документацию о том, как это относится к вашей проблеме. Я не знаю, почему putExtra не сработает в этом случае, но я все равно готов поспорить, если вы явно проверите, является ли bundle null , вы обнаружите, что это так.

да, я проверял его много раз, он не нулевой, он дает мне мой заголовок, который я хочу, но когда я пытаюсь получить свои данные через свой заголовок, он показывает мне пустую активность в приложении. у меня есть еще 2 действия с тот же код просто меняется в заголовке или ключе, и я получаю свои данные, но да, он показывает мне такую ​​​​ошибку, пока я отлаживаю свое приложение

я не знаю, что с ним случилось, я делал это много раз, но теперь это не работает

Источник

Attempt to invoke virtual method ‘boolean java.lang.String.equals(java.lang.Object)’ on a null object reference #18397

I am running the Android application with react-native run-android . The application crashing at the entry with the following error

Attempt to invoke virtual method ‘boolean java.lang.String.equals(java.lang.Object)’ on a null object reference

Environment

Environment:
OS: Windows 10
Node: 6.10.2
Yarn: 1.5.1
npm: 3.10.10
Watchman: Not Found
Xcode: N/A
Android Studio: Not Found

The machine does have Android Studio and Android SDK.

Packages: (wanted => installed)
react: ^16.3.0-alpha.1 => 16.3.0-alpha.2
react-native: 0.54.2 => 0.54.2

Expected Behavior

The application should open normally

Actual Behavior

The application is crashing with the following errors.

Steps to Reproduce

As this is a private project cannot give the code and steps to reproduce.

The text was updated successfully, but these errors were encountered:

This issue is not actionable without code or steps to reproduce.

I got same issue here, error show where I get data from API, and in log show

ReactNative: CatalystInstanceImpl.destroy() start
ReactNative: CatalystInstanceImpl.destroy() end

FYI I use
«react»: «16.3.0-alpha.1»,
«react-native»: «0.54.2»,

Please open a new issue.

I faced the same issue and the thing is that i haven’t export the value of API_URL that i have created in another page,because of that it gives an error(Attempt to invoke virtual method ‘boolean java.lang.String.equals(java.lang.Object)’ on a null object reference ).
I fixed my issue by exporting the value that i have created.

I’ve ran into the same issue. The error message originates from

Lines 81 to 82 in e636eb6

On line 81 the developer tries to extract the scheme (http/https) the request is using, but the method uri.getScheme() is returning null . That means your request has no scheme. Line 82 attempts to call a virtual method which doesn’t exist for the value null .

Add a scheme to your request and the problem should go away.

We should submit a PR to provide a clearer error message when the request doesn’t have a scheme.

Anyone solve it?

As @danihodovic explained this error due to providing null url for network request. In my case urls stored in .env file and we are using https://github.com/luggit/react-native-config for this. But I’ve not configured build.gradle file as described in https://github.com/luggit/react-native-config#extra-step-for-android .

In my case, it only happens if I disable JS Dev Mode from Dev Settings on Android.
Once I enable it and reload the app, the exception is gone.

I used fetch(SERVER_URL) also got the same error message «Attempt to invoke virtual method ‘boolean java.lang.String.equals(java.lang.Object)’ on a null object reference» .

As @danihodovic indicated, this crashed because uri was null in uri.getScheme() on line 81. So I printed out my SERVER_URL and noticed that it was undefined due to importing error. I fixed my uri and now it’s working.

If you get the same message as mine, check your URI before it crashes :

@trachanh1609 thank you! I had the same issue and followed your steps. just needed to fix the uri, but the error message (The big ugly red blob 🙂 ) wasn’t helpful in pointing that out.

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Источник

Attempt to invoke virtual method ‘int java.lang.String.compareToIgnoreCase(java.lang.String)’ on a null object reference #9556

🐛 Bug Report

Summary of Issue

When calling getContactsAsync() with sort set to firstName , I receive the following exception every time:

The cause appears to be that displayName on Contact is initialized to null, and if name is also null it will remain null. Then in the sort comparator, we do not verify that displayName is not null. This is in sortContactsBy method of ContactsModule.java .

Also, the exception will sometimes manifest as Attempt to invoke virtual method ‘int java.lang.String.length()’ on a null object reference instead.

Environment — output of expo diagnostics & the platform(s) you’re targeting

Expo CLI 3.13.1 environment info:
System:
OS: macOS 10.15.2
Shell: 5.8 — /usr/local/bin/zsh
Binaries:
Node: 13.14.0 —

/.nvm/versions/node/v13.14.0/bin/node
Yarn: 1.22.4 — /usr/local/bin/yarn
npm: 6.14.4 —

/.nvm/versions/node/v13.14.0/bin/npm
Watchman: 4.9.0 — /usr/local/bin/watchman
IDEs:
Android Studio: 4.0 AI-193.6911.18.40.6626763
Xcode: 11.6/11E708 — /usr/bin/xcodebuild
npmPackages:
@sentry/react-native: ^1.6.1 => 1.6.1
@types/react: ^16.8.22 => 16.9.11
@types/react-native: 0.62.2 => 0.62.2
react: 16.11.0 => 16.11.0
react-native: 0.62.2 => 0.62.2

Steps to Reproduce

Reproduced on a Samsung A10, though I’ve also seen it occur on a variety of Samsung, Motorola, LG devices. To reproduce, do the following:

1. Create a contact with no name set (can have just phone number).
2. Make the following call to fetch and sort contacts:

Note: If you remove the sort parameter, then the exception will not be thrown.

The text was updated successfully, but these errors were encountered:

Источник

Error invoking method java lang string

Encountering an error that you don’t see above? Ask on Piazza — using the error folder.

This error occurs when the class name and the filename of a given Java program do not match. For example, say that the following program is saved in a file named Foo.java: Since Foo does not match with Bar, the code will not compile. To fix this error, either rename the file or change the class name.

Errors of the form » expected» happen when the compiler detects a missing character in your code. The error message will tell you which character is missing and on which line. Consider the following program: These error messages tell you there is a missing curly brace on the first line and a missing semi-colon on the seventh line. To fix this kind of error, simply place the missing character in the correct position in the code:

An «illegal start of expression» error occurs when the compiler encounters an inappropriate statement in the code. Consider the following example: Here, there is a missing closing curly brace for the main method. Since the main method is not closed, the compiler is expecting the line after the call to my_method to be a part of the main method’s code. However, it instead encounters public static void my_method() < , which is not a valid statement inside a method.

The «illegal start of expression» error message is not as helpful as the «. expected» error message that we encountered above. For this error (and for many other errors), it may be necessary to look at the lines that come before the error to see where the problem is. In this case, we simply need to add a curly brace to close the main method on the line before where the compiler issued the warning. After recompiling, all of the errors are resolved.

Every method in Java requires that you explicitly state the return type of the method. Even methods that do not return a value must explicitly say void in the method signature, just as the main method does.

When a method declaration does not contain a return type, this error will occur:

An ArrayIndexOutOfBoundsException is thrown when an attempt is made to access an index in an array that is not valid. The only valid indices for an array arr are in the range [0, arr.length — 1 ]; any attempt to access an index outside of this range will result in this error. For example: This error is quite similar to the java.lang.StringIndexOutOfBoundsException: String index out of range: error that we have previously discussed. The error message for this kind of error is similarly irrelevant toward the end of the message. However, the first line lets you know that a problem with an array index was encountered, and the index in error was 3, in this case. The next line tells you that it encountered this error on line 5 of Test.java, inside the main method.

In this case, the error occurred because the for loop iterates too many times; the value of the loop index, i , reaches 4 and is therefore out of bounds. Instead, the upper bound should use the boolean operator, or an equivalent statement. When dealing with an ArrayIndexOutOfBoundsException , it is usually helpful to print out the value of the index variable that is accessing the array and try to trace through to code to find out why it is reaching that (invalid) value.

A StringIndexOutOfBoundsException is thrown when an attempt is made to access an index in the String that is not valid. The only valid indices for a String str are in the range [0, str.length() — 1 ]; any attempt to access an index outside of this range will result in this error. For example: The error message for this kind of error becomes less relevant towards the end. However, the first line lets you know that a problem with a String index was encountered, and the index in error was -1. The next line tells you that it encountered this error while trying to perform the substring routine, which was called from the Test class on line 5. This «backtrace» of the error tells you the line numbers of the method calls involved so that you can trace your error to the source and correct it.

Note that all of a , b , and c would have thrown this error, but the program was halted after the first occurred.

This is not a compile-time error, but rather a runtime error. In other words, the compiler will accept this kind of error because it is a logical error. Additionally, it may not be known before the program is run that the error will occur. To fix this error, you often have to correct the logic of your program to ensure that the program will not try to access an invalid index.

This method occurs when you try to call a method using the wrong number or wrong order of parameters. For example, consider the following program: The error message for this error is very helpful. The line that says «required» tells you about what the method is expecting. It lists the order of the arguments that are required. In the example above, the parameters for myMethod should be a double , then a String , and then an int .

The next line of the error message (which says «found») tells you what you (incorrectly) tried to use to call the method. In this example, we invoked the method using a double , then an int , and then a String — which is the wrong order!

We can fix this by ensuring that the number and ordering of the method parameters is correct:

This error typically happens when you are not adequately closing your program using curly braces. The error message is essentially saying that the compiler has reached the end of the file without any acknowledgement that the file has ended. For example: To fix this, all you have to do is correct your ending curly braces ( ‘>’ ). Sometimes all you need is a curly brace at the end of your file; other times you may have missed a curly brace or added an extra curly brace in the middle of your code.

One way to diagnose where the problem is occuring is to use the CTRL-A + TAB shortcut to attempt to properly indent your code. Since we have a curly brace problem, however, the code will not be properly indented. Search for the place in the file where the indentation first becomes incorrect. This is where your error is happening!

Once the curly braces in the program match up appropriately, the compiler will not complain:

An «unreachable statement» error occurs when the compiler detects that it is impossible to reach a given statement during the flow of a program. This error is often caused by placing statements after return or break . For example: The compiler gives two errors: one to indicate that the line System.out.println(«Returning » + twice); is an unreachable statement, and another because it assumes that if we can get to that print statement, then we would need a return statement somewhere after it.

We can fix this by placing the print statement before the return so it can be executed:

This error occurs when the compiler believes you’re trying to use a variable that has not been «initialized»— or given an initial value— yet. In a very simple case: Here, you have not told the compiler what the value of y is. Therefore, y cannot be printed; it needs to be initialized as x is in this example.

In more complicated scenarios, if statements can cause this error if you are not careful about ensuring that a variable is initialized. For example:

Original document created by Cody Doucette ’14.

Источник

Возникла проблема при сборке проекта в IntelliJ IDEA. Использовал Maven и JavaFX.

Суть программы считать данные с поля ввода текста, оправить на сервер запрос(поверка номера) и в случае, если номер есть в бд, идет переход на след. сцену.

При тестировании в IntelliJ IDEA все работает как часы, но при попытке запустить jar появляется ошибка:

Error invoking method

Разбираясь с проблемой пришел к тому, что если убрать код метода запроса на сервер (метод aurorization()), jar запускается и производится переход к след. сцене, но если «включить» метод и даже если не использовать метод, возникает ошибка:

Error invoking method

Для удобства код обработки нажатия кнопки и код отправки запроса на сервер представлены в контроллере.

MainApp

package com.devcolibri.mavenjavafxapp;

public class MainApp extends Application {

public static void main(String[] args) throws Exception {
    launch(args);
}

@Override
public void start(Stage stage) throws Exception {
    String fxmlFile = "/fxml/login.fxml";
    FXMLLoader loader = new FXMLLoader();
    Parent root = loader.load(getClass().getResourceAsStream(fxmlFile));
    stage.setTitle("YouDelivery");
    stage.setResizable(false);
    stage.setScene(new Scene(root));
    stage.getIcons().add(new Image("/ic/YD-256.png"));
    stage.show();
    }
}

Контроллер

package com.devcolibri.mavenjavafxapp.controllers;

public class LoginControllerFX {

    @FXML
    private TextField edLogin;


    public void logIn(ActionEvent actionEvent) {

        Stage stageIn = (Stage) 
        ((Node)actionEvent.getSource()).getScene().getWindow();
        String login = edLogin.getText();
        Resp authorization = aurorization(login, "1");

        if(true){
            try {
                FXMLLoader loader = new 
                FXMLLoader(getClass().getResource("/fxml/start_order.fxml"));
                Parent root = loader.load();
                stageIn.setScene(new Scene(root, 850, 450));
                stageIn.show();

            }  catch (Exception e) {
                e.printStackTrace();
            }
        }
        else
            showAlertError("Ошибка авторизации!");
    }

    private void showAlertError(String text) {
        Alert alert = new Alert(Alert.AlertType.ERROR);
        alert.setTitle("Авторизация");
        alert.setHeaderText(null);
        alert.setContentText(text);
        alert.showAndWait();
    }


    private Resp aurorization(String login, String pass) { // Метод авторизации
        Gson GSON = new Gson();
        String appKey = "c312b5a7b1794220a85b89079250e64e";
        String cliKey = "aec9813472954766897c74a55815d4e1";
        final String j =
            "{n" +
            ""app":"" + appKey + "",n" +
            ""cli":"" + cliKey + "",n" +
            ""email":"" + login + "",n" +
            ""password":"1"n" +
            "}";

        HttpClient httpClient = HttpClients.createDefault();
        String url = "https://api.scorocode.ru/api/v1/login";
        HttpPost httpPost = new HttpPost(url);
        httpPost.addHeader(HTTP.CONTENT_TYPE, "application/json");

        StringEntity stringEntity = new StringEntity(j, org.apache.http.entity.ContentType.APPLICATION_JSON);
        httpPost.setEntity(stringEntity);
        try {
            HttpResponse response = httpClient.execute(httpPost);
            int code = response.getStatusLine().getStatusCode();
            if (code == 200) {
                HttpEntity respEntity = response.getEntity();
                String result = EntityUtils.toString(respEntity);
                Resp resp = GSON.fromJson(result, Resp.class);
                if (!resp.getError() && 
                 !resp.getResult().getUser().getIsBlocked()) {
                    return resp;
                }
            }
        } catch (IOException e) {
            e.printStackTrace();
        }
        return null;
    }
}

pom.xml

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 
    http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <dependencies>
        <dependency>
            <groupId>commons-io</groupId>
            <artifactId>commons-io</artifactId>
            <version>2.6</version>
        </dependency>
        <dependency>
            <groupId>org.apache.httpcomponents</groupId>
            <artifactId>httpclient</artifactId>
            <version>4.5.5</version>
        </dependency>
        <dependency>
            <groupId>org.json</groupId>
            <artifactId>json</artifactId>
            <version>20180130</version>
        </dependency>
        <dependency>
            <groupId>com.google.code.gson</groupId>
            <artifactId>gson</artifactId>
            <version>2.8.4</version>
        </dependency>
        <dependency>
            <groupId>org.mongodb</groupId>
            <artifactId>mongodb-driver-sync</artifactId>
            <version>3.8.0</version>
        </dependency>
        <dependency>
            <groupId>com.akathist.maven.plugins.launch4j</groupId>
            <artifactId>launch4j-maven-plugin</artifactId>
            <version>1.5.2</version>
        </dependency>
    </dependencies>

    <groupId>prob2</groupId>
    <artifactId>prob2</artifactId>
    <version>1.0-SNAPSHOT</version>
    <packaging>jar</packaging>

    <build>
        <plugins>

            <plugin>
                <groupId>com.zenjava</groupId>
                <artifactId>javafx-maven-plugin</artifactId>
                <version>2.0</version>
                <configuration>
                    <mainClass>com.devcolibri.mavenjavafxapp.MainApp</mainClass>
                </configuration>
            </plugin>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-compiler-plugin</artifactId>
                <configuration>
                    <source>8</source>
                    <target>8</target>
                </configuration>
            </plugin>

        </plugins>
    </build>
</project>

Ошибка из консоли

Exception in Application start method
java.lang.reflect.InvocationTargetException
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
        at java.lang.reflect.Method.invoke(Unknown Source)
        at com.sun.javafx.application.LauncherImpl.launchApplicationWithArgs(LauncherImpl.java:389)
        at com.sun.javafx.application.LauncherImpl.launchApplication(LauncherImpl.java:328)
        at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
        at sun.reflect.NativeMethodAccessorImpl.invoke(Unknown Source)
        at sun.reflect.DelegatingMethodAccessorImpl.invoke(Unknown Source)
        at java.lang.reflect.Method.invoke(Unknown Source)
        at sun.launcher.LauncherHelper$FXHelper.main(Unknown Source)
Caused by: java.lang.RuntimeException: Exception in Application start method
        at com.sun.javafx.application.LauncherImpl.launchApplication1(LauncherImpl.java:917)
        at com.sun.javafx.application.LauncherImpl.lambda$launchApplication$154(LauncherImpl.java:182)
        at java.lang.Thread.run(Unknown Source)
Caused by: java.lang.NoClassDefFoundError: org/apache/http/HttpEntity
        at java.lang.Class.getDeclaredConstructors0(Native Method)
        at java.lang.Class.privateGetDeclaredConstructors(Unknown Source)
        at java.lang.Class.getConstructor0(Unknown Source)
        at java.lang.Class.newInstance(Unknown Source)
        at sun.reflect.misc.ReflectUtil.newInstance(Unknown Source)
        at javafx.fxml.FXMLLoader$ValueElement.processAttribute(FXMLLoader.java:927)
        at javafx.fxml.FXMLLoader$InstanceDeclarationElement.processAttribute(FXMLLoader.java:971)
        at javafx.fxml.FXMLLoader$Element.processStartElement(FXMLLoader.java:220)
        at javafx.fxml.FXMLLoader$ValueElement.processStartElement(FXMLLoader.java:744)
        at javafx.fxml.FXMLLoader.processStartElement(FXMLLoader.java:2707)
        at javafx.fxml.FXMLLoader.loadImpl(FXMLLoader.java:2527)
        at javafx.fxml.FXMLLoader.load(FXMLLoader.java:2425)
        at com.devcolibri.mavenjavafxapp.MainApp.start(MainApp.java:22)
        at com.sun.javafx.application.LauncherImpl.lambda$launchApplication1$161(LauncherImpl.java:863)
        at com.sun.javafx.application.PlatformImpl.lambda$runAndWait$174(PlatformImpl.java:326)
        at com.sun.javafx.application.PlatformImpl.lambda$null$172(PlatformImpl.java:295)
        at java.security.AccessController.doPrivileged(Native Method)
        at com.sun.javafx.application.PlatformImpl.lambda$runLater$173(PlatformImpl.java:294)
        at com.sun.glass.ui.InvokeLaterDispatcher$Future.run(InvokeLaterDispatcher.java:95)
        at com.sun.glass.ui.win.WinApplication._runLoop(Native Method)
        at com.sun.glass.ui.win.WinApplication.lambda$null$147(WinApplication.java:177)
        ... 1 more
Caused by: java.lang.ClassNotFoundException: org.apache.http.HttpEntity
        at java.net.URLClassLoader.findClass(Unknown Source)
        at java.lang.ClassLoader.loadClass(Unknown Source)
        at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)
        at java.lang.ClassLoader.loadClass(Unknown Source)
        ... 22 more
Exception running application com.devcolibri.mavenjavafxapp.MainApp

Сборка проекта

Project Structure -> Artifactc

Далее Build-> Build Artifacts-> Build

Похожие слова: control invoke method

Синонимы & Антонимы: не найдено