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Intellij idea

❗ These are MY favorite tips

Shortcuts​

  • Ctrl+Alt+<-/-> back or forward place, Alt+<-/-> left or right tab

  • Ctrl+Alt+H search in hierarchy (ctrl+shift+f)

  • Ctrl+Alt+L format current file

  • Ctrl+Alt+S open settings, Ctrl+Alt+Shift+S open project settings

  • Ctrl+Alt+O optimize import

  • Ctrl+Shift+I preview implementation

  • Ctrl+Shift+F10

  • Ctrl+Shift+Alt+T show refactoring options

  • Ctrl+B go to the declaration, Ctrl+Alt+B navigate to an implementation

  • Ctrl+C/X copy or cut the whole line

  • Ctrl+D duplicate line or selection

  • Ctrl+E view the most recently opened files

  • Ctrl+N find classes

  • Ctrl+W / Ctrl+Shift+W increasing or decreasing sections of code near the cursor

  • Ctrl+Y delete line

  • Alt+F7 find where something is used

  • Alt+F8 + Ctrl + Enter evaluate expression + execute

  • Alt+1 open/close project window

  • F2 jump to the next error, warning or suggestion.

  • F4 jump to source

  • Alt+J add selection for next occurrence

  • LocalHistory > show History

  • Help > Change Memory Settings > Edit Custom VM Options

Settings​

  • Appearance > Theme >> [NEWUI] Gradianto Deep Ocean
  • Editor > General > Code Completion >> Uncheck Match case, ignore cases for auto-completion
  • Editor > General > Apperarance >> Check Show method separators
  • Editor > General > Editor Tabls >> Uncheck Show tabls in one row (tab limit)

Global setting​

  • File > New Projets SetUp > Settings for New Projets >> For ex, Maven settings

Get rid of the pop-up message asking to trust certificate​

File | Settings | Tools | Server Certificates for Windows and linux

Open File or Project dialog window hangs in loading state since new UI​

It's possible to use a native file chooser on Windows. To enable it, add the following properties to the Help | Edit Custom Properties file and restart IDE :

sun.awt.windows.useCommonItemDialog=true
ide.win.file.chooser.native=true

Open declaration source in the same tab​

Uncheck Enable preview tab in the settings of project view

Resolve Symbol ... is inaccessible from here​

Java | Javadoc | Declaration has problems in Javadoc references

Uncheck Report inaccessible sympols

Plugins​

  • Pokemon progress
  • GitHub Copilot
  • Rainbow Brackets
  • SequenceDiagram
  • CodeGlance
  • Key Promoter X
  • SonarLint
  • Save Actions

Live template​

Junit test method​

@org.junit.jupiter.api.Test
@org.junit.jupiter.api.DisplayName("$TEST_NAME$")
void $METHOD_NAME$() {
    // GIVEN
    
    // WHEN
    
    // THEN
}

Junit5 live template

Parameterized test with value source​

<template name="pvtest" value="@org.junit.jupiter.params.ParameterizedTest(name = &quot;{index} $SUB_TEST_NAME$ {0}&quot;)&#10;@org.junit.jupiter.api.DisplayName(&quot;$TEST_NAME$&quot;)&#10;@org.junit.jupiter.params.provider.ValueSource($TYPE$ = {})&#10;void $METHOD_NAME$($ARG$) {&#10;    // GIVEN&#10;    &#10;    // WHEN&#10;    &#10;    // THEN&#10;}" description="Parameterized test with value source" toReformat="true" toShortenFQNames="true">
  <variable name="TEST_NAME" expression="" defaultValue="" alwaysStopAt="true" />
  <variable name="SUB_TEST_NAME" expression="" defaultValue="" alwaysStopAt="true" />
  <variable name="TYPE" expression="enum(&quot;strings&quot;,&quot;booleans&quot;,&quot;ints&quot;,&quot;longs&quot;,&quot;floats&quot;,&quot;doubles&quot;,&quot;chars&quot;,&quot;shorts&quot;,&quot;bytes&quot;,&quot;classes&quot;)" defaultValue="strings" alwaysStopAt="true" />
  <variable name="METHOD_NAME" expression="camelCase(TEST_NAME)" defaultValue="" alwaysStopAt="true" />
  <variable name="ARG" expression="" defaultValue="" alwaysStopAt="true" />
  <context>
    <option name="JAVA_DECLARATION" value="true" />
  </context>
</template>

Parameterized test with method source​

<template name="pmtest" value="@org.junit.jupiter.params.ParameterizedTest(name = &quot;{index} $SUB_TEST_NAME$ {0}&quot;)&#10;@org.junit.jupiter.api.DisplayName(&quot;$TEST_NAME$&quot;)&#10;@org.junit.jupiter.params.provider.MethodSource&#10;void $METHOD_NAME$($ARG$) {&#10;    // GIVEN&#10;    &#10;    // WHEN&#10;    &#10;    // THEN&#10;}&#10;&#10;private static java.util.stream.Stream&lt;org.junit.jupiter.params.provider.Arguments&gt; $METHOD_NAME$() {&#10;    return Stream.of(Arguments.of(),&#10;            Arguments.of());&#10;}" description="Parameterized test with method source" toReformat="true" toShortenFQNames="true">
  <variable name="TEST_NAME" expression="" defaultValue="" alwaysStopAt="true" />
  <variable name="ARG" expression="" defaultValue="" alwaysStopAt="true" />
  <variable name="SUB_TEST_NAME" expression="" defaultValue="" alwaysStopAt="true" />
  <variable name="METHOD_NAME" expression="camelCase(TEST_NAME)" defaultValue="" alwaysStopAt="true" />
  <context>
    <option name="JAVA_DECLARATION" value="true" />
  </context>
</template>

Docusaurus note header​

<template name="noteHeader" value="---&#10;id: $Label$&#10;sidebar_label: $Label$&#10;sidebar_position: $Pos$&#10;---&#10;# $Label$" description="" toReformat="false" toShortenFQNames="true">
  <variable name="Label" expression="" defaultValue="" alwaysStopAt="true" />
  <variable name="Pos" expression="" defaultValue="" alwaysStopAt="true" />
  <context>
    <option name="OTHER" value="true" />
  </context>
</template>

Markdown​

  • Code
<template name="text" value="`$TEXT$`" description="" toReformat="false" toShortenFQNames="true">
  <variable name="TEXT" expression="" defaultValue="" alwaysStopAt="true" />
  <context>
    <option name="OTHER" value="true" />
  </context>
</template>
  • Code block
<template name="code" value="```$CODE_TYPE$&#10;&#10;```" description="" toReformat="false" toShortenFQNames="true">
  <variable name="CODE_TYPE" expression="" defaultValue="" alwaysStopAt="true" />
  <context>
    <option name="OTHER" value="true" />
  </context>
</template>