File Encodings
IntelliJ IDEA uses these settings to view and edit files for which it was unable to detect the encoding and uses the specified encodings for new files.
If IntelliJ IDEA can’t determine the file or directory encodings, it falls back to the configured project encoding. If there is no project, IntelliJ IDEA uses the global encoding. File or directory encodings take precedence over the project encoding, which, in turn, takes precedence over the global encoding.
For more information about handling file encodings, see Encoding.
Select the encoding to use when other encoding options don’t apply.
For example, IntelliJ IDEA will use this encoding for files that are not part of any project or when you check out sources from a version control system.
Select the encoding to use for files that are not listed in the table below.
Specify the path to the files or directories for which you want to configure the encoding.
Select the encoding to use for the specified files and directories.
If this selector is disabled, the file probably has a BOM or declares the encoding explicitly. In this case, you can’t configure the encoding to use for this file.
The encoding selected for a directory applies to all files and subdirectories within it.
Default encoding for properties files
Select the encoding for properties files in your project.
The Java 1.8 API is designed to use the ISO 8859-1 encoding for properties files. You can use escape sequences for characters that are not defined by this encoding. Alternatively, you can define the default encoding for properties files on the project level and use a different API that can read properties files in the encoding you have defined.
Transparent native-to-ascii conversion
Show national characters (those not defined in ISO 8859-1) in place of the corresponding escape sequences.
By default, IntelliJ IDEA converts native characters to ASCII escape sequences with uppercase letters. To use lowercase letters, add the following platform property to the custom properties file and restart the IDE:
For more information, see Platform properties.
Create UTF-8 files
Select how IntelliJ IDEA should create UTF-8 files:
with BOM on Window and without BOM otherwise
By default, IntelliJ IDEA creates UTF-8 files without the BOM because some software is not compatible with the BOM, and it may be a problem when interpreting scripts. However, in some cases, you may want to have the BOM in your UTF-8 files.
To add or remove the BOM from all UTF-8 files in your project, select the project folder in the Project tool window. After that, from the main menu, select File | File Properties and select either Add BOM or Remove BOM .
Encoding
To display and edit files correctly, IntelliJ IDEA needs to know which encoding to use. In general, source code files are mostly in UTF-8. This is the recommended encoding unless you have some other requirements.
To determine the encoding of a file, IntelliJ IDEA uses the following steps:
If the byte order mark (BOM) is present, IntelliJ IDEA will use the corresponding Unicode encoding regardless of all other settings. For more information, see Byte order mark.
If the file declares the encoding explicitly, IntelliJ IDEA will use the specified encoding. For example, this can apply to XML, HTML, and JSP files. The explicit declaration also overrides all other settings, but you can change it in the editor.
If there is no BOM and no explicit encoding declaration in the file, IntelliJ IDEA will use the encoding configured for the file or directory in the file encoding settings. If encoding is not configured for the file or directory, IntelliJ IDEA will use the encoding of the parent directory. If the parent directory encoding is also not configured, IntelliJ IDEA will fall back to the Project Encoding , and if there is no project, to Global Encoding .
Change the encoding used to view a file
If IntelliJ IDEA displays characters in a file incorrectly, it probably couldn’t detect the file encoding. In this case, you need to specify the correct encoding to use for viewing and editing this file.
With the file open in the editor, either select File | File Properties | File Encoding from the main menu or click the File Encoding widget on the status bar, and select the correct encoding of the file.
The list of encodings is rather large. You can use speed search to quickly find the correct encoding: start typing when the popup is open.
Encodings marked with or might change the file contents. In this case, IntelliJ IDEA opens a dialog where you can choose what to do with the file:
Reload : load the file in the editor from disk and apply encoding changes to the editor only. You will see the content changes related to the chosen encoding, but the actual file will not change.
Convert : overwrite the file with the chosen encoding.
This will add an association for the file to the file encoding settings. IntelliJ IDEA will use the specified encoding to view and edit this file.
Configure file encoding settings
Press Control+Alt+S to open the IDE settings and then select Editor | File Encodings .
IntelliJ IDEA uses these settings to view and edit files for which it was unable to detect the encoding and uses the specified encodings for new files. For more information, see File Encodings.
Select console output encoding
By default, IntelliJ IDEA uses the system encoding to view console output.
In the Settings dialog ( Control+Alt+S ), select Editor | General | Console .
How do I change to UTF-8 in IntelliJ?
Select how IntelliJ IDEA should create UTF-8 files: with BOM. without BOM….By default, IntelliJ IDEA uses the system encoding to view console output.
- In the Settings/Preferences dialog Ctrl+Alt+S , select Editor | General | Console.
- Select the default encoding from the Default Encoding list.
- Click OK to apply the changes.
How do I change the encoding to UTF-8?
Click Tools, then select Web options. Go to the Encoding tab. In the dropdown for Save this document as: choose Unicode (UTF-8). Click Ok.
How do I change the encoding of a properties file?
Configure default encoding for properties files
- In the Settings/Preferences dialog Ctrl+Alt+S , select Editor | File Encodings.
- Select the encoding from the Default encoding for properties files list.
How do I view file properties in IntelliJ?
View differences in properties
- Open the Version Control tool window and switch to the Repository tab.
- In the Changed Files pane, select the file for which you want to view property differences.
- Choose Properties Diff From the context menu of the selection or click.
How do I bypass system properties in IntelliJ?
Use the Properties tab of the Build File Properties Dialog to pass properties to the build script at runtime. The specified values are equivalent to those defined after the -D option of the command line launcher. In addition to plain values, you can use macros that are evaluated at runtime.
Where is the idea properties file?
Locate the idea. properties file in the bin directory in IntelliJ IDEA’s installation directory. The default location is C:/Program Files/JetBrains/IntelliJ IDEA Community Edition 10.5.
How read .properties file in Java?
- import java.util.*;
- import java.io.*;
- public class Test <
- public static void main(String[] args)throws Exception <
- FileReader reader=new FileReader(“db.properties”);
- Properties p=new Properties();
- p.load(reader);
- System.out.println(p.getProperty(“user”));
How can I make IntelliJ faster?
IntelliJ IDEA Tips & Tricks: Improving performance
- Unload Modules. Working on a large project with many modules can greatly reduce the IDE performance.
- Excluding Files.
- Antivirus Exclusion.
- Disable Unused Plugins.
- Power-Saving Mode.
- Disk Defragmentation.
- Faster Program Switching.
- UPDATE: Activity Monitor.
Why is IntelliJ so slow?
You’ll find the memory indicator at the bottom right of your screen. It’s also possible to increase the default memory settings for IntelliJ: you can tweak custom VM settings: Afterwards you can specify an amount: If IntelliJ is still slow you can disable any plugins you don’t require.
How much RAM does IntelliJ use?
Why does IntelliJ use more memory?
The Java Virtual Machine (JVM) running IntelliJ IDEA allocates some predefined amount of memory. The default value depends on the platform. If you are experiencing slowdowns, you may want to increase the memory heap.
Why does PyCharm use CPU?
When Pycharm performs some operations such as indexing, it starts draining the entire CPU resources. While this may achieve the operation faster, it heats up the CPU resulting in the fan running at full speed, and the other application becoming non-responsive.
What is XX MaxPermSize?
The -XX:MaxPermSize option specifies the maximum size for the permanent generation, which is the memory holding objects such as classes and methods. Properly tuning this parameter can reduce memory issues in the permanent generation.
What is the maximum JVM heap size?
The max JVM heap size limit has been removed since we moved to completely 64 bit releases. As such you are now limited by the OS and/or machine. The theoretical limit is 2^64 bytes, which is 16 exabytes (1 exabyte = 1024 petabytes, 1 petabyte = 1024 terabytes).
What is the default heap size?
What is Max XMX in Java?
The Maximum Java Heap Size (Xmx) is the maximum amount of memory that Java application can uses. Customers can configure Xmx via JVM options -Xmx to optimize their Java application performance, but quite a lot of Java users never explicitly specify the -Xmx option, so in those cases the default Xmx has been used.
What is JVM heap size?
Share. The Java heap is the area of memory used to store objects instantiated by applications running on the JVM. Objects in the heap can be shared between threads. Many users restrict the Java heap size to 2-8 GB in order to minimize garbage collection pauses.
What is JVM tuning?
JVM tuning mainly involves optimizing the garbage collector for better collection performance so that applications running on VMs can have a larger throughput while using less memory and experiencing lower latency.
How much RAM does JVM use?
Is JVM inside RAM?
The JVM divides its memory into two main categories: heap memory and non-heap memory. Heap memory is the part with which people are typically the most familiar. It’s where objects that are created by the application are stored. They remain there until they are no longer referenced and are garbage collected.
How much RAM should I allocate?
It’s always a good rule of thumb to never allocate more than half. (Unless you have a lot that by all means, but from 8–16. And I only use 2gb ram and it doesn’t bottleneck it at all so I don’t think using more ram is going to really boost much performance to be honest.
Sergey Zelenin’s blog
Столкнулся с проблемкой несоответствия кодировок ресурсных файлов и web страничек. В JSP страничке кодировка указана UTF-8, для проекта в IntelliJ IDEA тоже UTF-8, а в ресурсном файле — системная. Поэтому в моей вьюшке русские символы отображались некорректно. Понятно, что можно пофиксить с помощью утилиты native2ascii, которая находится в установленном JDK , но это приходилось бы делать каждый раз при изменении файлов.
Как пофиксить в Идее:
1. В окне настроек находим настройки File Encodings
2. Удивляемся почему для properties файлов не настроена кодировка по умолчанию и меняем Default encoding for properties files на UTF-8
3. Выбираем галочку «Transparent native-to-ascii conversion
Теперь IDEA будет автоматически переводить символы в ресурсных файлах из UTF-8 в ASCII код. В редакторе мы будем продолжать видеть русские символы: