Java ioexception что делать

java.io.IOException – How to solve Java IOException

In this article, we will explain how to solve the java.io.IOException.

This exception is related to Input and Output operations in the Java code. It happens when there is a failure during reading, writing, and searching file or directory operations. IOException is a checked exception. A checked exception is handled in the java code by the developer. This exception object has a string message which is the root cause for the failure.

IOException has subclasses such as FileNotFoundException , EOFException , UnsupportedEncodingException , SocketException , and SSLException . If the file is not found, FileNotFoundException is thrown. While reading a file, EOFException occurs when the end of the file is reached. If the file has an unsupported encoding, UnsupportedEncodingException occurs. When the socket connection is closed, SocketException can happen. SSLException happens when the SSL connection is not established.

1. Prerequisites

Java 7 or 8 is required on the Linux, windows, or Mac operating system.

2. Download

You can download Java 7 from the Oracle site. On the other hand, You can use Java 8. Java 8 can be downloaded from the Oracle website.

3. Setup

You can set the environment variables for JAVA_HOME and PATH. They can be set as shown below:

JAVA_HOME="/desktop/jdk1.8.0_73" export JAVA_HOME PATH=$JAVA_HOME/bin:$PATH export PATH

4. What is Java IOException – java.io.IOException

java.io.IOException is an exception which programmers use in the code to throw a failure in Input & Output operations. It is a checked exception. The programmer needs to subclass the IOException and should throw the IOException subclass based on the context.

5. UML diagram

The sequence diagram of throwing the IOException in classes Manager, Service, Facade, and Persistence Manager is shown below:

6. When is IOException thrown

Java application needs to handle failures related to reading, writing, and searching a file or a directory. java.io.IOException is the base exception class used for handling the failures. In a method of a class, try, catch, and finally block handles the exception. The application API class methods throw an IOException or its subclasses.

Try catch finally block of code is shown below in different scenarios. The code below shows the printing of the exception stack trace. Printing Stack trace

try < >catch(IOException ioException) < ioException.printStacktrace(); >finally

In the code below, a runtime exception is thrown after catching the IOException in a java application. throwing a runtime exception

try < >catch(IOException ioException) < throw new RuntimeException("IO Exception in CommandLine Application",ioException); >finally

In the code below, a wrapped exception is thrown after catching IOException in Facade class. throwing a wrapped exception

try < >catch(IOException ioException) < throw new WrappedException("IO Exception in Facade" ,ioException); >finally

In the code below, throwing a business exception after catching the IOException is shown. Throwing a business exception

try < >catch(IOException ioException) < throw new BusinessException("IO Exception in Service" ,ioException); >finally

Throwing an application exception after catching an IOException is presented in the code below: Throwing an application exception

try < >catch(IOException ioException) < throw new ApplicationException("IO Exception in Manager" ,ioException); >finally

6. A simple case of java.io.ioexception

Let’s see a very simple case of a Java IOException . In the following example, we are going to try to read some lines of text from a file that does not exist: IOException

import java.io.FileInputStream; import java.io.FileNotFoundException; public class FileNotFoundExceptionExample < public void checkFileNotFound() < try < FileInputStream in = new FileInputStream("input.txt"); System.out.println("This is not printed"); >catch (FileNotFoundException fileNotFoundException) < fileNotFoundException.printStackTrace(); >> public static void main(String[] args) < FileNotFoundExceptionExample example = new FileNotFoundExceptionExample(); example.checkFileNotFound(); >>

The code above is executed as shown below: Run Command

javac InputOutputExceptionExample.java java InputOutputExceptionExample

Now, when you run this program because the file input.txt does not exist, the exception is thrown as shown in the screen below. As you can see the message is showing the cause of the problem. The root cause of the problem is that the file does not exist.

EOFException is a subclass of the IOException.The code below shows how an EndOfFileException happens while reading an input file. While reading a file, EOFException is thrown when the end of the file is reached. EndOfFileException

import java.io.DataInputStream; import java.io.EOFException; import java.io.File; import java.io.FileInputStream; import java.io.IOException; public class EndOfFileExceptionExample < public void checkEOF() < File file = new File("einput.txt"); DataInputStream dataInputStream = null; try < dataInputStream = new DataInputStream(new FileInputStream(file)); while(true) < dataInputStream.readInt(); >> catch (EOFException eofException) < eofException.printStackTrace(); >catch (IOException ioException) < ioException.printStackTrace(); >finally < try< if (dataInputStream != null) < dataInputStream.close(); >> catch (IOException ioException) < ioException.printStackTrace(); >> > public static void main(String[] args) < EndOfFileExceptionExample example = new EndOfFileExceptionExample(); example.checkEOF(); >>

The code above is executed as shown below: Run Command

javac EndOfFileExceptionExample.java java EndOfFileExceptionExample

You can run the above code as per the command above. The output is as shown on the screen below.

FileNotFoundException is a subclass of IOException. FileNotFoundException scenario is presented in the code below. This happens if the input file is not found. FileNotFoundException

import java.io.FileInputStream; import java.io.FileNotFoundException; public class FileNotFoundExceptionExample < public void checkFileNotFound() < try < FileInputStream in = new FileInputStream("input.txt"); System.out.println("This is not printed"); >catch (FileNotFoundException fileNotFoundException) < fileNotFoundException.printStackTrace(); >> public static void main(String[] args) < FileNotFoundExceptionExample example = new FileNotFoundExceptionExample(); example.checkFileNotFound(); >>

The code above is executed as shown below: Run Command

javac FileNotFoundExceptionExample.java java FileNotFoundExceptionExample

The output of the code when executed is shown below.

7. How to solve java.io.IOException

IOException is a Java exception that occurs when an IO operation fails. Develop can explicitly handle the exception in a try-catch-finally block and print out the root cause of the failure. The developer can take the correct actions to solve this situation by having additional code in the catch and finally blocks.

8. Download the Source Code

That was an example of how to solve the java.io.ioexception.

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You can download the full source code of this example here: java.io.ioexception – How to solve Java IOException

Last updated on Oct. 12th, 2021

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Class IOException

Signals that an I/O exception of some sort has occurred. This class is the general class of exceptions produced by failed or interrupted I/O operations.

Constructor Summary

Constructs an IOException with the specified cause and a detail message of (cause==null ? null : cause.toString()) (which typically contains the class and detail message of cause ).

Method Summary

Methods declared in class java.lang.Throwable

Methods declared in class java.lang.Object

Constructor Details

IOException

IOException

IOException

Constructs an IOException with the specified detail message and cause. Note that the detail message associated with cause is not automatically incorporated into this exception’s detail message.

IOException

Constructs an IOException with the specified cause and a detail message of (cause==null ? null : cause.toString()) (which typically contains the class and detail message of cause ). This constructor is useful for IO exceptions that are little more than wrappers for other throwables.

Report a bug or suggest an enhancement
For further API reference and developer documentation see the Java SE Documentation, which contains more detailed, developer-targeted descriptions with conceptual overviews, definitions of terms, workarounds, and working code examples. Other versions.
Java is a trademark or registered trademark of Oracle and/or its affiliates in the US and other countries.
Copyright © 1993, 2023, Oracle and/or its affiliates, 500 Oracle Parkway, Redwood Shores, CA 94065 USA.
All rights reserved. Use is subject to license terms and the documentation redistribution policy.

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Class IOException

Signals that an I/O exception of some sort has occurred. This class is the general class of exceptions produced by failed or interrupted I/O operations.

Constructor Summary

Constructs an IOException with the specified cause and a detail message of (cause==null ? null : cause.toString()) (which typically contains the class and detail message of cause ).

Method Summary

Methods declared in class java.lang.Throwable

Methods declared in class java.lang.Object

Constructor Details

IOException

IOException

IOException

Constructs an IOException with the specified detail message and cause. Note that the detail message associated with cause is not automatically incorporated into this exception’s detail message.

IOException

Constructs an IOException with the specified cause and a detail message of (cause==null ? null : cause.toString()) (which typically contains the class and detail message of cause ). This constructor is useful for IO exceptions that are little more than wrappers for other throwables.

Report a bug or suggest an enhancement
For further API reference and developer documentation see the Java SE Documentation, which contains more detailed, developer-targeted descriptions with conceptual overviews, definitions of terms, workarounds, and working code examples. Other versions.
Java is a trademark or registered trademark of Oracle and/or its affiliates in the US and other countries.
Copyright © 1993, 2023, Oracle and/or its affiliates, 500 Oracle Parkway, Redwood Shores, CA 94065 USA.
All rights reserved. Use is subject to license terms and the documentation redistribution policy.

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Как исправить ошибку «java.io.ioexception» в Minecraft?

При запуске игр мы часто сталкиваемся с различными ошибками и сбоями, которые заставляют переключить нашу вовлеченность с игрового мира в процесс поиска способов их решения. Более того, некоторые из них не просто решить. В частности, к таким ошибкам при запуске Minecraft относится и « internal exception java.io.ioexception», которая препятствует подключению ПК к внешнему серверу игры.

Простые решения

В общем она может появиться по ряду причин и некоторые из них можно исправить простыми способами. Поэтому прежде чем перейти к более продвинутым решениям выполните следующие шаги.

Во-первых, попробуйте исправить ошибку Java.Io.Ioexception обычным перезапуском Minecraft. В противном случае перезапустите компьютер и роутер. Также нужно проверить состояние внешнего сервера Minecraft. Если эти методы не сработали, перейдите к следующим шагам.

Варианты запуска

Ошибка внутреннего исключения «internal exception java.io.ioexception удаленный хост принудительно разорвал существующее подключение» в основном происходит из-за проблем с Java. Даже если игра работает, сбой может произойти из-за проблем этой среды выполнения. Иногда программа запуска использует старую версию java, хотя в системе установлен последний ее выпуск.

В этом случае нужно заставить загрузчик Minecraft использовать последнюю версию программной среды. Для этого нужно перейти в параметры запуска и в профиле переключить путь с устаревшей версии на новую.

Отключение межсетевого экрана

Межсетевые экраны, включая брандмауэр Windows, могут сбросить подключение с внешним сервером Minecraft на этапе запуска игры. Чтобы узнать, не причастен ли он к этому событию, попробуйте отключить эту функцию безопасности.

Откройте параметры Windows нажатием на Win + I и перейдите в раздел Обновление и безопасность. На вкладке Безопасность Windows выберите раздел Брандмауэр и защита сети.

Для активной частной сети переместите переключатель в положение «Отключено». После этого попробуйте запустить игру.

Установка разрешений в брандмауэре Windows

Если продолжаете сталкиваться с ошибкой внутреннего исключения java.io.ioexception, попробуйте добавить среду в список разрешений брандмауэра.

С помощью поискового запроса перейдите в брандмауэр. На панели слева перейдите на вкладку «Разрешение взаимодействия с приложением или компонентом в брандмауэре Windows». Затем щелкните на кнопку изменения параметров.

Найдите в списке файлы Java Platform SE и разрешите им доступ по частной сети.

После перезагрузки компьютера проблема должна быть решена.

Уменьшение глубины прорисовки

С ошибкой внутреннего исключения можно столкнуться, когда Minecraft не сможет отобразить всю картинку в целом из-за низкой скорости Интернета. В этом случае уменьшите глубину прорисовки в настройках до минимально допустимого.

В настройках Майнкрафт в разделе «Настройки графики» переместите ползунок прорисовки до минимального, например, до 2-х позиций.

Если ошибка исчезла, увеличьте этот показатель на единицу, пока не достигните оптимального значения.

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