dumpStack()方法是Thread类的静态方法，可以用于打印或显示当前线程的堆栈跟踪到System.err。dumpStack()方法的目的基本上是用于调试，并且在内部，该方法调用Throwable类的printStackTrace()方法。该方法不会引发任何异常。
语法
public static void dumpStack()
例子
public class ThreadDumpStackTest {
public static void main(String args[]) {
Thread t = Thread.currentThread();
t.setName("ThreadDumpStackTest");
t.setPriority(1);
System.out.println("Current Thread: " + t);
int count = Thread.activeCount();
System.out.println("Active threads: " + count);
Thread threads[] = new Thread[count];
Thread.enumerate(threads);
for (int i = 0; i < count; i++) {
System.out.println(i + ": " + threads[i]);
}
Thread.dumpStack();
}
}Output
Current Thread: Thread[ThreadDumpStackTest,1,main]
Active threads: 1
0: Thread[ThreadDumpStackTest,1,main]
java.lang.Exception: Stack trace
at java.lang.Thread.dumpStack(Thread.java:1336)
at ThreadDumpStackTest.main(ThreadDumpStackTest.java:14) 
