java - Why deadlock is not happening for implicit locks? -

what re-entrant lock , concept in general? says

if lock non re-entrant grab lock, block when go grab again, deadlocking own process.

public class implicitlock {  synchronized public void test1() {     system.out.println("enter test1");     test2();     system.out.println("exit test1");  }  synchronized public void test2() {     system.out.println("inside test2");  }  } 

from main class , executed

implicitlock lock1 = new implicitlock(); lock1.test1(); 

i got below output though expecting deadlock when call goes test2 per implicit lock description didn't

enter test1 inside test2 exit test1 

java synchronized lock reentrant. jakob jenkov blog:

lock reentrance

synchronized blocks in java reentrant. means, if java thread enters synchronized block of code, , thereby take lock on monitor object block synchronized on, thread can enter other java code blocks synchronized on same monitor object. here example:

public class reentrant{     public synchronized outer(){         inner();     }     public synchronized inner(){         //do     } } 

taken from: http://tutorials.jenkov.com/java-concurrency/locks.html