Das folgende Beispiel zeigt, wie die Methode getThreadId() verwendet wird, um die Thread-ID zu erhalten:
/* author by w3cschool.cc Main.java */public class Main extends Object implements Runnable { private ThreadID var; public Main(ThreadID v) { this.var = v; } public void run() { try { print("var getThreadID =" + var.getThreadID()); Thread.sleep(2000); print("var getThreadID =" + var.getThreadID()); } catch (InterruptedException x) { } } private static void print(String msg) { String name = Thread.currentThread().getName(); System.out.println(name + ": " + msg); } public static void main(String[] args) { ThreadID tid = new ThreadID(); Main shared = new Main(tid); try { Thread threadA = new Thread(shared, "threadA"); threadA.start(); Thread.sleep(500); Thread threadB = new Thread(shared, "threadB"); threadB.start(); Thread.sleep(500); Thread threadC = new Thread(shared, "threadC"); threadC.start(); } catch (InterruptedException x) { } }}class ThreadID extends ThreadLocal { private int nextID; public ThreadID() { nextID = 10001; } private synchronized Integer getNewID() { Integer id = new Integer(nextID); nextID++; return id; } protected Object initialValue() { print("in initialValue()"); return getNewID(); } public int getThreadID() { Integer id = (Integer) get(); return id.intValue(); } private static void print(String msg) { String name = Thread.currentThread().getName(); System.out.println(name + ": " + msg); }}
Das Ausgabeergebnis der Ausführung des obigen Codes ist:
threadA: in initialValue() threadA: var getThreadID =10001 threadB: in initialValue() threadB: var getThreadID =10002 threadC: in initialValue() threadC: var getThreadID =10003 threadA: var getThreadID =10001 threadB: var getThreadID =10002 threadC: var getThreadID =10003
Das ist das Java-Beispiel – Holen Sie sich den Inhalt der Thread-ID. Weitere verwandte Inhalte finden Sie auf der chinesischen PHP-Website (www.php.cn)!