Java equivalent to #region in C#

Question

I want to use regions for code folding in Eclipse; how can that be done in Java?

An example usage in C#:

#region name
//code
#endregion

Answer 1

There's no such standard equivalent. Some IDEs - Intellij, for instance, or Eclipse - can fold depending on the code types involved (constructors, imports etc.), but there's nothing quite like #region.

Answer 2

Jet Brains IDEA has this feature. You can use hotkey surround with for that (ctrl + alt + T). It's just IDEA feature.

Regions there look like this:

//region Description

Some code

//endregion

Answer 3

With Android Studio, try this:

//region VARIABLES
private String _sMyVar1;
private String _sMyVar2;
//endregion

Careful : no blank line after //region ...

And you will get:

Answer 4

No equivalent in the language... Based on IDEs...

For example in netbeans:

NetBeans/Creator supports this syntax:

// <editor-fold defaultstate="collapsed" desc="Your Fold Comment">
...
// </editor-fold>

http://forums.java.net/jive/thread.jspa?threadID=1311

Answer 5

For Eclipse IDE the Coffee-Bytes plugin can do it, download link is here.

EDIT:

Latest information about Coffee-Bytes is here.

Answer 6

동일한 목록에 대한 워크 플로를 트리거하고있는 것 같습니다.항목이 변경된 경우 워크 플로를 시작하고 워크 플로를 사용하여 동일한 목록 항목을 변경하려고합니다.그래서 그 오류를 반환합니다.

Answer 7

This is more of an IDE feature than a language feature. Netbeans allows you to define your own folding definitions using the following definition:

// <editor-fold defaultstate="collapsed" desc="user-description">
  ...any code...
// </editor-fold>

As noted in the article, this may be supported by other editors too, but there are no guarantees.

Answer 8

the fastest way in Android Studio (or IntelliJ IDEA)

1. highlight the code you want to surround it
2. press ctrl + alt + t
3. press c ==> then enter the description
4. enjoy

Answer 9

AndroidStudio region
Create region

First, find (and define short cut if need) for Surround With menu

Then, select the code, press Ctrl+Alt+Semicolon -> choose region..endregion...

Go to region

First, find Custom Folding short cut
Second, from anywhere in your code, press Ctrl+Alt+Period('>' on keyboard)

Answer 10

이 페이지는 게시 사이트 나 공동 작업에서 사용되는 데 사용되는 것과 관련이 있지만 오히려 웹 응용 프로그램 수준에서 변경할 수있는 응용 프로그램 페이지입니다. - 자세히보기 http://geekswithblogs.net/jayantsharma/charive/2012/07/09/ How-to-change-system-application-pages.aspx (및 error.aspx 페이지에서 찾기 http://www.learningsharepoint.com/2013/06/17/replace-default-pagenotfoundError -aspx-with-custom-page-in-sharepoint-2013 / )

SharePoint 2013 관련 게시 사이트에서는 바꿀 수있는 오류 페이지에 연결된 새로운 콘텐츠 유형이 있습니다 ( https://www.nothingbutsharepoint.com/sites/devwiki/articles/pages/sharepoint-2013-custom-error-pages.aspx < / a>)

Answer 11

The best way

//region DESCRIPTION_REGION
int x = 22;
// Comments
String s = "SomeString";
//endregion;

Tip: Put ";" at the end of the "endregion"

Answer 12

하위 사이트 수준에서 게시 기능을 활성화하는 것과 같습니다.그러면 사이트 페이지 라이브러리가 생성됩니다.

사이트 작업> 사이트 설정> 사이트 기능 관리> 활성 "SharePoint Server Publishing"으로 이동하십시오.페이지 작성 옵션이 누락 된 하위 사이트 수준 에서이 작업을 수행해야합니다.

Answer 13

If anyone is interested, in Eclipse you can collapse all your methods etc in one go, just right click when you'd normally insert a break point, click 'Folding' > 'Collapse all'. It know it's not an answer to the question, but just providing an alternative to quick code folding.

Answer 14

#region

// code

#endregion

Really only gets you any benefit in the IDE. With Java, there's no set standard in IDE, so there's really no standard parallel to #region.

Answer 15

I usually need this for commented code so I use curly brackets at start and end of that.

{
// Code
// Code
// Code
// Code
}

It could be used for code snippets but can create problems in some code because it changes the scope of variable.

Answer 16

Actually johann, the # indicates that it's a preprocessor directive, which basically means it tells the IDE what to do.

In the case of using #region and #endregion in your code, it makes NO difference in the final code whether it's there or not. Can you really call it a language element if using it changes nothing?

Apart from that, java doesn't have preprocessor directives, which means the option of code folding is defined on a per-ide basis, in netbeans for example with a //< code-fold> statement

Answer 17

On Mac and Android Studio follow this sequence:

1. Highlight the source code to fold
2. Press Alt+Command+t
3. Select <editor-fold>

Also you can select other options:

Answer 18

In Eclipse you can collapse the brackets wrapping variable region block. The closest is to do something like this:

public class counter_class 
{ 

    { // Region

        int variable = 0;

    }
}

Answer 19

SharePoint는 자동으로 꺼진 경고 및 워크 플로의 링크에 대한 기본 URL을 사용합니다.경고와 관련하여 기본 영역의 URL을 변경하는 것입니다.이것은 CMDlet Set-SpalTernateURL 또는 (내 환경 설정) 웹 응용 프로그램을 삭제하고 새 URL을 사용하기 위해 새 웹 응용 프로그램을 만드는 새 응용 프로그램을 사용하여 AAM이있는 CA에서 수행 할 수 있습니다.선택한 옵션은 웹 응용 프로그램과 해당 인증 공급자에게 수행 한 구성의 양에 따라 다릅니다.처음 두 가지 옵션이 사용자를 위해 작동 할 수 있지만 웹 앱이 생성 된 후에 수행 한 구성의 양에 따라 실제로 의존합니다.아무 것도 없을 것으로 확신 할 수있는 유일한 방법은 웹 응용 프로그램을 재현하는 것입니다.

TechNet 문서는 이전 환경의 URL을 사용하는 이주 된 웹 앱에 대한 것입니다.

Answer 20

There is some option to achieve the same, Follow the below points.

1) Open Macro explorer:

2) Create new macro:

3) Name it "OutlineRegions" (Or whatever you want)

4) Right Click on the "OutlineRegions" (Showing on Macro Explorer) select the "Edit" option and paste the following VB code into it:

    Imports System
Imports EnvDTE
Imports EnvDTE80
Imports EnvDTE90
Imports EnvDTE90a
Imports EnvDTE100
Imports System.Diagnostics
Imports System.Collections

Public Module OutlineRegions

    Sub OutlineRegions()
        Dim selection As EnvDTE.TextSelection = DTE.ActiveDocument.Selection

        Const REGION_START As String = "//#region"
        Const REGION_END As String = "//#endregion"

        selection.SelectAll()
        Dim text As String = selection.Text
        selection.StartOfDocument(True)

        Dim startIndex As Integer
        Dim endIndex As Integer
        Dim lastIndex As Integer = 0
        Dim startRegions As Stack = New Stack()

        Do
            startIndex = text.IndexOf(REGION_START, lastIndex)
            endIndex = text.IndexOf(REGION_END, lastIndex)

            If startIndex = -1 AndAlso endIndex = -1 Then
                Exit Do
            End If

            If startIndex <> -1 AndAlso startIndex < endIndex Then
                startRegions.Push(startIndex)
                lastIndex = startIndex + 1
            Else
                ' Outline region ...
                selection.MoveToLineAndOffset(CalcLineNumber(text, CInt(startRegions.Pop())), 1)
                selection.MoveToLineAndOffset(CalcLineNumber(text, endIndex) + 1, 1, True)
                selection.OutlineSection()

                lastIndex = endIndex + 1
            End If
        Loop

        selection.StartOfDocument()
    End Sub

    Private Function CalcLineNumber(ByVal text As String, ByVal index As Integer)
        Dim lineNumber As Integer = 1
        Dim i As Integer = 0

        While i < index
            If text.Chars(i) = vbCr Then
                lineNumber += 1
                i += 1
            End If

            i += 1
        End While

        Return lineNumber
    End Function
End Module

5) Save the macro and close the editor.

6) Now let's assign shortcut to the macro. Go to Tools->Options->Environment->Keyboard and search for your macro in "show commands containing" textbox (Type: Macro into the text box, it will suggest the macros name, choose yours one.)

7) now in textbox under the "Press shortcut keys" you can enter the desired shortcut. I use Ctrl+M+N.

Use:

return
{
//Properties
//#region
Name:null,
Address:null
//#endregion
}

8) Press the saved shortcut key

See below result: