Main.java Source code

Introduction

Here is the source code for Main.java

Source

//package com.java2s;
/*
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

public class Main {
    /**
     * This method recursively visits all thread groups under group.
     * 
     * @param group
     *            {@link ThreadGroup}
     * @param level
     *            a thread level
     */
    public static void viewRunningThreads(ThreadGroup group, int level) {
        /* 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
            Thread thread = threads[i];
            System.out.println(thread.getState() + ", " + thread.getName());
        }

        /* 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++) {
            viewRunningThreads(groups[i], level + 1);
        }
    }
}