37. public class MyStack {
int idx = 0;
char [] data = new char[ 6];
public synchronized void push( char c) {
data[ idx] = c;
idx++;
}
public synchronized char pop() {
idx--;
return data[ idx];
}
44. 例子:
public Thread(ThreadGroup group, Runnable target)
public Thread(ThreadGroup group, String name)
public Thread(ThreadGroup group, Runnable target,
String name)
ThreadGroup myThreadGroup = new ThreadGroup(
"My Group of Threads");
Thread myThread = new Thread(myThreadGroup,
"a thread for my group");
theGroup = myThread.getThreadGroup();