Main.java Source code

Introduction

Here is the source code for Main.java

Source

//package com.java2s;
import java.util.ArrayList;
import java.util.List;

public class Main {
    public static List<Thread> getFullThreadList(boolean includeDaemons) {

        List<Thread> list = new ArrayList<Thread>();

        // Find the root thread group
        ThreadGroup root = Thread.currentThread().getThreadGroup().getParent();
        while (root.getParent() != null) {
            root = root.getParent();
        }

        // Visit each thread group
        visit(list, root, 0, includeDaemons);

        // returns the full list
        return list;
    }

    private static void visit(List<Thread> list, ThreadGroup group, int level, boolean includeDaemons) {

        // Get threads in `group'
        int numThreads = group.activeCount();
        Thread[] threads = new Thread[numThreads * 2];
        numThreads = group.enumerate(threads, false);

        // Enumerate each thread in `group'
        for (int i = 0; i < numThreads; i++) {
            // Get thread
            if (!includeDaemons && threads[i].isDaemon())
                continue;

            list.add(threads[i]);
        }

        // Get thread subgroups of `group'
        int numGroups = group.activeGroupCount();
        ThreadGroup[] groups = new ThreadGroup[numGroups * 2];
        numGroups = group.enumerate(groups, false);

        // Recursively visit each subgroup
        for (int i = 0; i < numGroups; i++) {
            visit(list, groups[i], level + 1, includeDaemons);
        }
    }
}