getting exception in below stacktrace program

Question

I have developed the program to prove that if thread and it is in static synchronized method still a thread can enter other static synchronized method from that method in java itself but my programs throws the exception please advise what went wrong in it , below is the code

package com.synchrnozie;

class MyRunnable18 implements Runnable {

    @Override
    public void run() {
        method1();
    }

    static synchronized void method1() {
        System.out.println("static synchronized void method1() started");
        method2();
        System.out.println("static synchronized void method1() ended");
    }

    static synchronized void method2() {
        System.out.println("in static synchronized method2()");
        method3();
    }

    static synchronized void method3() {
        System.out.println("in static synchronized method3()");
        method3();
    }

}

public class staticNesting {
    public static void main(String args[]) throws InterruptedException {
        MyRunnable18 MyRunnable18 = new MyRunnable18();
        Thread thread1 = new Thread(MyRunnable18, "Thread-1");
        thread1.start();
    }

}

and below is the exception stack trace ..

Exception in thread "Thread-1" java.lang.StackOverflowError
    at sun.nio.cs.SingleByte.withResult(Unknown Source)
    at sun.nio.cs.SingleByte.access$000(Unknown Source)
    at sun.nio.cs.SingleByte$Encoder.encodeArrayLoop(Unknown Source)
    at sun.nio.cs.SingleByte$Encoder.encodeLoop(Unknown Source)
    at java.nio.charset.CharsetEncoder.encode(Unknown Source)
    at sun.nio.cs.StreamEncoder.implWrite(Unknown Source)
    at sun.nio.cs.StreamEncoder.write(Unknown Source)
    at java.io.OutputStreamWriter.write(Unknown Source)
    at java.io.BufferedWriter.flushBuffer(Unknown Source)
    at java.io.PrintStream.write(Unknown Source)
    at java.io.PrintStream.print(Unknown Source)
    at java.io.PrintStream.println(Unknown Source)
    at com.synchrnozie.MyRunnable18.method3(staticNesting.java:24)
    at com.synchrnozie.MyRunnable18.method3(staticNesting.java:25)

You are calling method3() from method3() repeatedly.So there is ending for this. — PSR, Jan 05 '17 at 05:28
http://stackoverflow.com/questions/214741/what-is-a-stackoverflowerror You can refer this — Mohamed Anees A, Jan 05 '17 at 05:36

score 1 · Answer 1 · answered Jan 05 '17 at 05:29

1

Your methode3() call method3() infinitly , maybe that's why ?

answered Jan 05 '17 at 05:29

Topsy

1,023
1
11
26

score 1 · Answer 2 · answered Jan 05 '17 at 05:37

1

You are making recursive calls to method3 which is resulting in stackoverlflow error.

 static synchronized void method3() {
            System.out.println("in static synchronized method3()");
            method3();
        }

answered Jan 05 '17 at 05:37

Noman Khan

920
5
12

getting exception in below stacktrace program

2 Answers2