Example usage for java.lang ThreadGroup getParent

Introduction

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

Prototype

public final ThreadGroup getParent()

Source Link

Document

Returns the parent of this thread group.

Usage

From source file:Main.java

public static void main(String[] argv) throws Exception {
    ThreadGroup group = Thread.currentThread().getThreadGroup().getParent();
    while (group.getParent() != null) {
        group = group.getParent();/*from   w w  w  .  ja  va 2 s  .  co m*/
    }
    int numThreads = group.activeCount();
    Thread[] threads = new Thread[numThreads * 2];
    numThreads = group.enumerate(threads, false);

    for (int i = 0; i < numThreads; i++) {
        Thread thread = threads[i];
        System.out.println(thread.getName());
    }

    int numGroups = group.activeGroupCount();
    ThreadGroup[] groups = new ThreadGroup[numGroups * 2];
    numGroups = group.enumerate(groups, false);

    for (int i = 0; i < numGroups; i++) {
        System.out.println(groups[i]);
    }
}

From source file:Main.java

public static void main(String[] args) throws Exception {
    ThreadGroup tg = Thread.currentThread().getThreadGroup();

    MyThread mt1 = new MyThread(tg, "first");
    MyThread mt2 = new MyThread(tg, "second");

    mt1.start();//from   w  w  w. jav  a2 s  . c om
    mt2.start();

    ThreadGroup parent = tg.getParent();
    Thread[] list = new Thread[parent.activeCount()];
    int count = parent.enumerate(list, true);
    String[] thdinfo = new String[count];
    for (int i = 0; i < count; i++)
        thdinfo[i] = list[i].toString();

    mt1.join();
    mt2.join();

    for (int i = 0; i < count; i++)
        System.out.println(thdinfo[i]);
}

From source file:Main.java

public static ThreadGroup getThreadRoot() {
    ThreadGroup root = Thread.currentThread().getThreadGroup();
    while (root.getParent() != null) {
        root = root.getParent();/*from w  ww  . j a v a2 s.  c  o  m*/
    }
    return root;
}

From source file:Main.java

public static ThreadGroup getRootThreadGroup() {
    ThreadGroup threadGroup = Thread.currentThread().getThreadGroup();
    while (threadGroup.getParent() != null) {
        threadGroup = threadGroup.getParent();
    }/*from   www. j a v  a  2  s . co  m*/

    return threadGroup;
}

From source file:Main.java

public static ThreadGroup getRootThreadGroup() {
    ThreadGroup group = Thread.currentThread().getThreadGroup();
    while (null != group.getParent()) {
        group = group.getParent();//from   w ww  .j  a  v  a  2 s.  c o m
    }
    return group;
}

From source file:Main.java

public static Thread findThreadByName(String name) {
    ThreadGroup group = Thread.currentThread().getThreadGroup();

    while (group.getParent() != null)
        group = group.getParent();/* w w  w.  j a v a2 s .com*/
    Thread[] threadList = new Thread[group.activeCount() + 5];
    group.enumerate(threadList, true);
    for (Thread thread : threadList)
        if (thread != null && thread.getName().equals(name))
            return thread;
    return null;
}

From source file:Main.java

public static ThreadGroup getRootThreadGroup() {
    ThreadGroup threadGroup = Thread.currentThread().getThreadGroup();
    while (null != threadGroup.getParent()) {
        threadGroup = threadGroup.getParent();
    }/*from w  w w .  j  a  va  2  s . c om*/

    return threadGroup;
}

From source file:Main.java

/**
 * Return the system thread group (sometimes also referred as "root thread group").
 *
 * @return the system thread group/*from   w  w w  .  j  a  v  a2s  . c  om*/
 * @throws  SecurityException  if the current thread cannot modify
 *          thread groups from this thread's thread group up to the system thread group
 */
public static ThreadGroup getSystemThreadGroup() {
    ThreadGroup threadGroup = Thread.currentThread().getThreadGroup();
    while (threadGroup.getParent() != null) {
        threadGroup = threadGroup.getParent();
    }
    return threadGroup;
}

From source file:Main.java

public static String getThreadTree() {
    ThreadGroup root = Thread.currentThread().getThreadGroup();
    while (root.getParent() != null) {
        root = root.getParent();//  w  w  w .j  a va 2  s  .  c  o  m
    }
    StringBuffer buffer = new StringBuffer();

    buffer.append(root.toString()).append("\r");
    visit(root, 1, buffer);
    return buffer.toString();
}

From source file:Main.java

public static ThreadGroup rootThreadGroup() {
    ThreadGroup tg = Thread.currentThread().getThreadGroup();
    ThreadGroup ptg = tg.getParent();
    while (ptg != null) {
        tg = ptg;//from ww w.j a  va  2s  . com
        ptg = tg.getParent();
    }
    return tg;
}