IntelliJ IDEA Won't start

What is your OS? Try to start IDE from command line or terminal and examine the output from terminal.

If you are on Windows check the Windows Event Log at the moment of issue of on Linux check the system log.

Also check if there are any java crash logs (files with names like `java_error_in_idea_*.log` in your user home directory).

If you have have antivirus/firewall try with it disabled or make sure that IDE settings directories IDE installation home and project files are excluded from the scan.

Hello, Andrey Dernov!

Thank for your reply.

My OS is Windows 10. I have tried to do what you told me, but when i try to open the IDE from command prompt

 (C:\Users> start IntelliJ IDEA Community Edition 2018.2.4 x604  [i have made copy to this IDE shortcut, otherwise it is on D:\>]) it shows this message:

"Windows cannot find 'IntelliJ'. Make sure you typed the name correclty, and then try agian".

Nohting shows on the Even log, not bad java files and i am not using any antivirus.

What could be the problem?

In command prompt cd to the <IDE installation home>/bin directory and launch idea.bat file.

I did it, and here is the message: 

Start Failed: Internal error. Please report to http://jb.gg/ide/critical-startup-errors

java.lang.RuntimeException: Could not find installation home path. Please make sure bin/idea.properties is present in the installation directory.
at com.intellij.openapi.application.PathManager.getHomePath(PathManager.java:90)
at com.intellij.openapi.application.PathManager.getHomePath(PathManager.java:68)
at com.intellij.openapi.application.PathManager.loadProperties(PathManager.java:413)
at com.intellij.ide.Bootstrap.main(Bootstrap.java:17)
at com.intellij.idea.Main.main(Main.java:61)

Also, an UI exception occurred on attempt to show above message:
java.lang.Error: Trampoline must not be defined by the bootstrap classloader
at sun.reflect.misc.Trampoline.<clinit>(MethodUtil.java:51)
at java.lang.Class.forName0(Native Method)
at java.lang.Class.forName(Class.java:348)
at sun.reflect.misc.MethodUtil.getTrampolineClass(MethodUtil.java:406)
at sun.reflect.misc.MethodUtil.access$000(MethodUtil.java:78)
at sun.reflect.misc.MethodUtil$1.run(MethodUtil.java:301)
at sun.reflect.misc.MethodUtil$1.run(MethodUtil.java:299)
at java.security.AccessController.doPrivileged(Native Method)
at sun.reflect.misc.MethodUtil.getTrampoline(MethodUtil.java:298)
at sun.reflect.misc.MethodUtil.<clinit>(MethodUtil.java:81)
at javax.swing.UIDefaults.getUI(UIDefaults.java:769)
at javax.swing.UIManager.getUI(UIManager.java:1016)
at javax.swing.text.JTextComponent.updateUI(JTextComponent.java:340)
at javax.swing.text.JTextComponent.<init>(JTextComponent.java:314)
at javax.swing.JEditorPane.<init>(JEditorPane.java:196)
at javax.swing.JTextPane.<init>(JTextPane.java:90)
at com.intellij.idea.Main.showMessage(Main.java:159)
at com.intellij.idea.Main.showMessage(Main.java:135)
at com.intellij.idea.Main.main(Main.java:64)

D:\IntelliJ IDEA!\IntelliJ IDEA Community Edition 2018.2.4\bin>

Is "IntelliJ IDEA!" a real folder name? 

Try to re-install from https://www.jetbrains.com/idea/download into a new empty directory without exclamation mark. Exclude form AV/firewall IDE installation home and IDE settings directories as mentioned.

WOW! Dude that was the problem! Mystery solved!! Thank you so much and have a nice day! :)

For those that the error is not referring to the wrong path, I had this error after updating intelij, somehow intelij deleted my idea.properties file, i just put the idea.properties file in  /bin directory and intelij opened again.

Please, could anyone help me to fix or tell me what to do about the installation of Java and intelliJ on my system, I have successfully done all the installation but couldn't launch the intelliJ to create my first project. And the funniest thing here is that, I have installed the same Java and intelliJ for 3 people since last two days, all of theirs are working perfectly but couldn't resolve mine. I have enough space in my system and have also uninstalled the application to reinstall it several times but the problem persisted.

@Pcmagictouch24 are there any error messages? Also, could you please provide idea.log https://intellij-support.jetbrains.com/hc/en-us/articles/207241085-Locating-IDE-log-files
?

Hello there

I downloaded the idea of intellect. then I installed it. but my computer can't open it. I try to open it, but nothing

is my computer bad?

my computer is Windows 7 32-bit

thanks in advance

Vvali7413

Please try running the IDE from the command line using idea.bat: https://intellij-support.jetbrains.com/hc/en-us/articles/360011901879-How-to-start-IDE-from-the-command-line.

What errors do you see?

Hi, after update IDEA 2021.2 I can't open it.
Win 10

I tried to run dat file from cmd it falls with Exception:
Exception in thread "main" java.lang.reflect.InvocationTargetException
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
at java.base/java.lang.reflect.Method.invoke(Method.java:566)
at java.instrument/sun.instrument.InstrumentationImpl.loadClassAndStartAgent(InstrumentationImpl.java:513)
at java.instrument/sun.instrument.InstrumentationImpl.loadClassAndCallPremain(InstrumentationImpl.java:525)
Caused by: java.lang.RuntimeException: java.lang.NullPointerException
at fuck_the_regulations_v320.en.b(en.java)
at fuck_the_regulations_v320.dH.premain(dH.java)
... 6 more
Caused by: java.lang.NullPointerException
... 8 more
*** java.lang.instrument ASSERTION FAILED ***: "result" with message agent load/premain call failed at ./src/java.instrument/share/native/libinstrument/JPLISAgent.c line: 422
FATAL ERROR in native method: processing of -javaagent failed, processJavaStart failed

I will try to reinstall IDEA

You have some crack agent installed, it's likely loaded from the .vmoptions file (https://intellij-support.jetbrains.com/hc/en-us/articles/206544869).

Andrey Dernov

I used your link to try to download my IDE
What file extension should I use???
.exe or .zip???

israeldestiny15 Any of them. The ".exe" would be a bit easier. 

But it still didn't work. The IDE didn't open. I got a pop up telling me that it wasn't for my PC version.

May you show the screenshot? It would be also useful if you share idea.log via https://uploads.jetbrains.com/

Konstantin Annikov

C:\Program Files\JetBrains\IntelliJ IDEA 2021.3.1\bin>.\idea.bat
2022-02-16 12:57:01,709 [     25]   WARN - llij.ide.plugins.PluginManager - id redefinition ([row,col,system-id]: [2,3,"product classpath"])
2022-02-16 12:57:03,201 [   1517]  ERROR - llij.ide.plugins.PluginManager - java.net.BindException: Address already in use: bind
java.util.concurrent.CompletionException: java.net.BindException: Address already in use: bind
        at java.base/java.util.concurrent.CompletableFuture.encodeThrowable(CompletableFuture.java:314)
        at java.base/java.util.concurrent.CompletableFuture.completeThrowable(CompletableFuture.java:319)
        at java.base/java.util.concurrent.CompletableFuture$AsyncSupply.run(CompletableFuture.java:1702)
        at java.base/java.util.concurrent.CompletableFuture$AsyncSupply.exec(CompletableFuture.java:1692)
        at java.base/java.util.concurrent.ForkJoinTask.doExec(ForkJoinTask.java:290)
        at java.base/java.util.concurrent.ForkJoinPool$WorkQueue.topLevelExec(ForkJoinPool.java:1020)
        at java.base/java.util.concurrent.ForkJoinPool.scan(ForkJoinPool.java:1656)
        at java.base/java.util.concurrent.ForkJoinPool.runWorker(ForkJoinPool.java:1594)
        at java.base/java.util.concurrent.ForkJoinWorkerThread.run(ForkJoinWorkerThread.java:183)
Caused by: java.net.BindException: Address already in use: bind
        at java.base/sun.nio.ch.Net.bind0(Native Method)
        at java.base/sun.nio.ch.Net.bind(Net.java:455)
        at java.base/sun.nio.ch.Net.bind(Net.java:447)
        at java.base/sun.nio.ch.ServerSocketChannelImpl.bind(ServerSocketChannelImpl.java:227)
        at io.netty.channel.socket.nio.NioServerSocketChannel.doBind(NioServerSocketChannel.java:134)
        at io.netty.channel.AbstractChannel$AbstractUnsafe.bind(AbstractChannel.java:562)
        at io.netty.channel.DefaultChannelPipeline$HeadContext.bind(DefaultChannelPipeline.java:1334)
        at io.netty.channel.AbstractChannelHandlerContext.invokeBind(AbstractChannelHandlerContext.java:506)
        at io.netty.channel.AbstractChannelHandlerContext.bind(AbstractChannelHandlerContext.java:491)
        at io.netty.channel.DefaultChannelPipeline.bind(DefaultChannelPipeline.java:973)
        at io.netty.channel.AbstractChannel.bind(AbstractChannel.java:260)
        at io.netty.bootstrap.AbstractBootstrap$2.run(AbstractBootstrap.java:356)
        at io.netty.util.concurrent.AbstractEventExecutor.safeExecute(AbstractEventExecutor.java:164)
        at io.netty.util.concurrent.SingleThreadEventExecutor.runAllTasks(SingleThreadEventExecutor.java:469)
        at io.netty.channel.nio.NioEventLoop.run(NioEventLoop.java:500)
        at io.netty.util.concurrent.SingleThreadEventExecutor$4.run(SingleThreadEventExecutor.java:986)
        at io.netty.util.internal.ThreadExecutorMap$2.run(ThreadExecutorMap.java:74)
        at io.netty.util.concurrent.FastThreadLocalRunnable.run(FastThreadLocalRunnable.java:30)
        at java.base/java.lang.Thread.run(Thread.java:829)
2022-02-16 12:57:03,230 [   1546]  ERROR - llij.ide.plugins.PluginManager - IntelliJ IDEA 2021.3.1  Build #IU-213.6461.79
2022-02-16 12:57:03,233 [   1549]  ERROR - llij.ide.plugins.PluginManager - JDK: 11.0.13; VM: OpenJDK 64-Bit Server VM; Vendor: JetBrains s.r.o.
2022-02-16 12:57:03,233 [   1549]  ERROR - llij.ide.plugins.PluginManager - OS: Windows 10
2022-02-16 12:57:03,235 [   1551]  ERROR - llij.ide.plugins.PluginManager - Last Action:

i have tried re-installed but same. have to close via task manager. windows 10, 2021.3.1 and 2021.3.2

any advice? thanks

EDIT: 

netsh winsock reset

and a reboot solved