Example usage for java.lang ThreadGroup enumerate

Introduction

In this page you can find the example usage for java.lang ThreadGroup enumerate.

Prototype

public int enumerate(ThreadGroup list[]) 

Source Link

Document

Copies into the specified array references to every active subgroup in this thread group and its subgroups.

Usage

From source file:MyThread.java

public static void main(String args[]) throws Exception {

    ThreadGroup group = new ThreadGroup("new Group");

    MyThread t1 = new MyThread(group, "Thread1");
    MyThread t2 = new MyThread(group, "Thread2");

    t1.start();//ww w .ja v  a 2  s.  co  m
    t2.start();

    Thread.sleep(1000);

    System.out.println(group.activeCount() + " threads in thread group...");

    Thread th[] = new Thread[group.activeCount()];
    group.enumerate(th);
    for (Thread t : th) {
        System.out.println(t.getName());
    }
    Thread.sleep(1000);

    System.out.println(group.activeCount() + " threads in thread group...");

    group.interrupt();
}

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From source file:MyThread.java

public static void main(String args[]) throws Exception {

    ThreadGroup group = new ThreadGroup("Group");

    ThreadGroup newGroup = new ThreadGroup(group, "new group");

    MyThread t1 = new MyThread(group, "Thread1");
    MyThread t2 = new MyThread(group, "Thread2");

    t1.start();//from ww  w.  j av  a  2  s.  c  om
    t2.start();

    Thread.sleep(1000);

    System.out.println(group.activeCount() + " threads in thread group...");

    Thread th[] = new Thread[group.activeCount()];
    group.enumerate(th);
    for (Thread t : th) {
        System.out.println(t.getName());
    }
    Thread.sleep(1000);

    System.out.println(group.activeCount() + " threads in thread group...");

    group.interrupt();
}

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From source file:MyThread.java

public static void main(String args[]) throws Exception {
    ThreadGroup tg = new ThreadGroup("My Group");

    MyThread thrd = new MyThread(tg, "MyThread #1");
    MyThread thrd2 = new MyThread(tg, "MyThread #2");
    MyThread thrd3 = new MyThread(tg, "MyThread #3");

    thrd.start();//from   www . ja  v  a 2 s  .  c  o  m
    thrd2.start();
    thrd3.start();

    Thread.sleep(1000);

    System.out.println(tg.activeCount() + " threads in thread group.");

    Thread thrds[] = new Thread[tg.activeCount()];
    tg.enumerate(thrds);
    for (Thread t : thrds)
        System.out.println(t.getName());

    thrd.myStop();

    Thread.sleep(1000);

    System.out.println(tg.activeCount() + " threads in tg.");
    tg.interrupt();
}

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From source file:NewThread.java

public static void main(String args[]) {
    ThreadGroup groupA = new ThreadGroup("Group A");
    ThreadGroup groupB = new ThreadGroup("Group B");

    NewThread ob1 = new NewThread("One", groupA);
    NewThread ob2 = new NewThread("Two", groupA);
    NewThread ob3 = new NewThread("Three", groupB);
    NewThread ob4 = new NewThread("Four", groupB);

    groupA.list();//from  w  w  w. j ava 2s  .c om
    groupB.list();
    Thread tga[] = new Thread[groupA.activeCount()];
    groupA.enumerate(tga);
    for (int i = 0; i < tga.length; i++) {
        ((NewThread) tga[i]).mysuspend();
    }

    try {
        Thread.sleep(4000);
    } catch (InterruptedException e) {
        System.out.println("Main thread interrupted.");
    }

    System.out.println("Resuming Group A");
    for (int i = 0; i < tga.length; i++) {
        ((NewThread) tga[i]).myresume();
    }

    try {
        ob1.join();
        ob2.join();
        ob3.join();
        ob4.join();
    } catch (Exception e) {
        System.out.println("Exception in Main thread");
    }
}

---

From source file:MyThread.java

public static void main(String args[]) {
    ThreadGroup groupA = new ThreadGroup("Group A");
    ThreadGroup groupB = new ThreadGroup("Group B");

    MyThread ob1 = new MyThread("One", groupA);
    MyThread ob2 = new MyThread("Two", groupA);
    MyThread ob3 = new MyThread("Three", groupB);
    MyThread ob4 = new MyThread("Four", groupB);

    System.out.println("\nHere is output from list():");
    groupA.list();/*from w ww .  j  av a  2s.c  om*/
    groupB.list();

    System.out.println("Suspending Group A");
    Thread tga[] = new Thread[groupA.activeCount()];
    groupA.enumerate(tga); // get threads in group
    for (int i = 0; i < tga.length; i++) {
        ((MyThread) tga[i]).suspendMe(); // suspend each thread
    }

    try {
        Thread.sleep(1000);
    } catch (InterruptedException e) {
        System.out.println("Main thread interrupted.");
    }

    System.out.println("Resuming Group A");
    for (int i = 0; i < tga.length; i++) {
        ((MyThread) tga[i]).resumeMe();
    }

    try {
        System.out.println("Waiting for threads to finish.");
        ob1.join();
        ob2.join();
        ob3.join();
        ob4.join();
    } catch (Exception e) {
        System.out.println("Exception in Main thread");
    }
    System.out.println("Main thread exiting.");
}

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From source file:Main.java

public static void interruptThreadAndJoin(ThreadGroup threadGroup) {
    Thread[] threads = new Thread[threadGroup.activeCount()];
    threadGroup.enumerate(threads);

    for (Thread thread : threads) {
        interruptThreadAndJoin(thread);/*ww w  .j ava2s .com*/
    }
}

---

From source file:Main.java

public static void interruptThreadAndJoin(ThreadGroup threadGroup, int activeThreadsCount) {
    Thread[] threads = new Thread[activeThreadsCount];
    threadGroup.enumerate(threads);

    for (Thread thread : threads) {
        interruptThreadAndJoin(thread);/*from ww  w. j a  v  a  2s  .  c o m*/
    }
}

---

From source file:Main.java

public static Thread[] getThreadArray(ThreadGroup group) {
    Thread[] threads = new Thread[group.activeCount()];
    for (;;) {/*www.  j a v  a 2s. c o  m*/
        int l = group.enumerate(threads);
        if (l == threads.length)
            break;
        threads = new Thread[l];
    }
    return threads;
}

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From source file:Main.java

public static List<String> namesOfActiveThreadsIn(ThreadGroup grp) {
    List<String> threadNames = new ArrayList<String>();
    Thread[] threads = new Thread[grp.activeCount() * 10];
    int count = grp.enumerate(threads);
    for (int i = 0; i < count; i++) {
        threadNames.add(threads[i].getName());
    }/*from w  w w.  j a  va2  s. c o  m*/
    return threadNames;
}

---

From source file:Mem.java

public static void dumpThreadInfo() {
    ThreadGroup g = Thread.currentThread().getThreadGroup();
    Thread[] t = new Thread[g.activeCount()];
    g.enumerate(t);
    System.err.println("Active threads in " + g);
    for (int i = 0; i < t.length; ++i)
        System.err.println(t[i]);
}

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