intellij-idea interview questions
Top intellij-idea frequently asked interview questions
I'm switching over from Eclipse to IntelliJ. In Eclipse, if you do Ctrl+O in the editor, it will show a hover popup that allows you to search for a method in the class you're editing.
What is the equivalent shortcut for that in IntelliJ?
Source: (StackOverflow)
I like to use Eclipse's shortcut Ctrl + O which outlines the current source. Is there an equivalent shortcut in IntelliJ IDEA?
It opens a dialog which allows for quick search of methods and fields in a class.
Source: (StackOverflow)
I remember seeing in either IntelliJ or Eclipse the setting to reformat (cleanup) files whenever they are saved. How do I find it (didn't find it in the settings)
Source: (StackOverflow)
Is there a way to tell IntelliJ never to use wildcard imports?
Under 'Settings > Code Style > Imports', I can see that you can specify the 'class count' prior to IntelliJ using wildcard imports. However, if I never want to use wildcard imports can I turn this functionality off?
I have tried putting -1 or leaving the field blank but that just tells IntelliJ to always use wildcard imports. Obviously a not-so-nice solution would be to put a ridiculously high number so that you never encounter wildcard imports but I was hoping there was a nicer way to just turn it off.
Source: (StackOverflow)
I am about to start developing an android app and need to get an IDE. Eclipse and the android eclipse plugin appears to be the natural choice. However I am familiar with intelliJ and re-sharper so I would prefer use intelliJ.
Has anyone used http://code.google.com/p/idea-android? Is this any good?
Should I just bite the bullet and learn Eclipse?
Source: (StackOverflow)
This question already has an answer here:
I was using IntelliJ-IDEA IDE , I want to create a jar file from java compiled class files. but I not found command or file, How to create a jar file (like eclipse java archive export)
Source: (StackOverflow)
Possible Duplicate:
Intellij Idea 9/10, what folders to check into (or not check into) source control?
I started using WebStorm for web development and am not sure what to add and what to exclude from our Git repository. Clearly some files inside the .idea folder are meant to be version controlled like the external library settings (jsLibraryMappings.xml) but others will probably change very often and are developer-specific (e.g., workspace.xml).
What is the recommended .gitignore pattern for WebStorm / IntelliJ IDEA?
P.S. There are already questions about this but usually focus only on whether to include the whole .idea folder or whether to fully exclude it. I think some of the files inside the .idea folder should be version controlled while others shouldn't and I'm trying to find out which ones.
Source: (StackOverflow)
I'm using IDEA 12 Leda on Mountain Lion. I wanted to increase the maximum memory that IDE can use. I set the VMOptions in Info.plist file to be
-Xmx2048m -ea -XX:+HeapDumpOnOutOfMemoryError -Xverify:none -Xbootclasspath/a:../lib/boot.jar
When I open up IDEA, I still see the maximum memory to be 711m.
jps -v shows my VMOptions has been loaded but it's replaced by the following options.
29388 **-Xmx2048m** -ea -XX:+HeapDumpOnOutOfMemoryError -Xverify:none -Xbootclasspath/a:../lib/boot.jar -Xms128m **-Xmx800m** -XX:MaxPermSize=350m -XX:ReservedCodeCacheSize=64m -XX:+UseCodeCacheFlushing -XX:+UseCompressedOops -Didea.paths.selector=IdeaIC12 -Dsun.java2d.noddraw=true -Didea.max.intellisense.filesize=2500 -Didea.dynamic.classpath=false -Didea.jars.nocopy=false -Dsun.java2d.d3d=false -Dapple.awt.fullscreencapturealldisplays=false -Dapple.laf.useScreenMenuBar=true -Djava.endorsed.dirs= -Dswing.bufferPerWindow=false -Didea.fatal.error.notification=enabled -Didea.cycle.buffer.size=1024 -Didea.popup.weight=heavy -Didea.xdebug.key=-Xdebug -Dapple.awt.graphics.UseQuartz=true -Dsun.java2d.pmoffscreen=false -Didea.no.launcher=false -DCVS_PASSFILE=~/.cvspass -Didea.use.default.antialiasing.in.editor=false -Dcom.apple.mrj.application.live-resize=false -Didea.smooth.progress=false
29392 Jps -Dapplication.home=/System/Library/Java/JavaVirtualMachines/1.6.0.jdk/Contents/Home -Xms8m
Where does -Xmx800 come from? I need to remove it.
Source: (StackOverflow)
While using intelliJ 13 ultimate edition for a week, it just seems really slow.
First of all, the whole IDE stops for a second or so every once in a while. The java editor's auto complete is really slow compared to 12 version.
I have not changed anything from default setting other than using dracula theme.
Is this happening to everybody? Or do I have to change some setting to resolve this problem??
EDIT
It seems that this is not a problem of my own. Many people suggested setting the heap size higher than default or clearing the cache, but I have not checked or tested on these suggestion.
However, the fact that IntelliJ 12 performs fine with default settings but 13 not still remains. As folks at Jetbrain probably seen how this problems affects many people, they are probably fixing it as we speak(or already found a fix).
Source: (StackOverflow)
When I attempt to run the following test in IntelliJ IDEA I get the message:
!!! JUnit version 3.8 or later expected:
It should be noted that this is an Android project I am working on in IntelliJ IDEA 9.
public class GameScoreUtilTest {
@Test
public void testCalculateResults() throws Exception {
final Game game = new Game();
final Player player1 = new Player();
{
final PlayedHole playedHole = new PlayedHole();
playedHole.setScore(1);
game.getHoleScoreMap().put(player1, playedHole);
}
{
final PlayedHole playedHole = new PlayedHole();
playedHole.setScore(3);
game.getHoleScoreMap().put(player1, playedHole);
}
final GameResults gameResults = GameScoreUtil.calculateResults(game);
assertEquals(4, gameResults.getScore());
}
}
The full stack trace looks like this...
!!! JUnit version 3.8 or later expected:
java.lang.RuntimeException: Stub!
at junit.runner.BaseTestRunner.<init>(BaseTestRunner.java:5)
at junit.textui.TestRunner.<init>(TestRunner.java:54)
at junit.textui.TestRunner.<init>(TestRunner.java:48)
at junit.textui.TestRunner.<init>(TestRunner.java:41)
at com.intellij.rt.execution.junit.JUnitStarter.junitVersionChecks(JUnitStarter.java:152)
at com.intellij.rt.execution.junit.JUnitStarter.canWorkWithJUnitVersion(JUnitStarter.java:136)
at com.intellij.rt.execution.junit.JUnitStarter.main(JUnitStarter.java:49)
at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:39)
at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:25)
at java.lang.reflect.Method.invoke(Method.java:597)
at com.intellij.rt.execution.application.AppMain.main(AppMain.java:110)
Process finished with exit code -3
Source: (StackOverflow)
In Eclipse, hovering over a method, variable, etc displays a tooltip with the corresponding JavaDocs. Is there such a feature in IntelliJ?
Source: (StackOverflow)
Is there feature that will automatically break debugging on first exception occurrence?
So we
- start application
- do something that throw exception
- got IntelliJ popped up highlighted line where exception occurred.
Source: (StackOverflow)
When running a JUnit test, using IntelliJ IDEA, I get
How can I correct this?
- Using SDK 1.7
- Module language level is 1.7
Maven build works fine. (That's why I believe this in IDEA configuration issue)
Source: (StackOverflow)