multithreading - Thread count is different when debugging and Running the porgramme -


i using following code :-

public static void main(string[] args) {         int threadpool = 4;         system.out.println("intital count---" + thread.activecount());         thread.currentthread(); }

the output different while debugging on intellij :- intital count---1

while running on intellij :- intital count---2

i not able understand thread in when run program.

there 1 thread made intellij when running it:

"monitor ctrl-break"         java.lang.thread.state: runnable             @ java.net.dualstackplainsocketimpl.accept0(native method)             @ java.net.dualstackplainsocketimpl.socketaccept(dualstackplainsocketimpl.java:131)             @ java.net.abstractplainsocketimpl.accept(abstractplainsocketimpl.java:398)             @ java.net.plainsocketimpl.accept(plainsocketimpl.java:199)             @ java.net.serversocket.implaccept(serversocket.java:530)             @ java.net.serversocket.accept(serversocket.java:498)             @ com.intellij.rt.execution.application.appmain$1.run(appmain.java:90)             @ java.lang.thread.run(thread.java:745)

you print them using:

/** http://crunchify.com/how-to-generate-java-thread-dump-programmatically/ */ public static string crunchifygeneratethreaddump() {     final stringbuilder dump = new stringbuilder();     final threadmxbean threadmxbean = managementfactory.getthreadmxbean();     final threadinfo[] threadinfos = threadmxbean.getthreadinfo(threadmxbean.getallthreadids(), 100);     (threadinfo threadinfo : threadinfos) {         dump.append('"');         dump.append(threadinfo.getthreadname());         dump.append("\" ");         final thread.state state = threadinfo.getthreadstate();         dump.append("\n   java.lang.thread.state: ");         dump.append(state);         final stacktraceelement[] stacktraceelements = threadinfo.getstacktrace();         (final stacktraceelement stacktraceelement : stacktraceelements) {             dump.append("\n        @ ");             dump.append(stacktraceelement);         }         dump.append("\n\n");     }     return dump.tostring(); }

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