globalcounter.java

一个开源的JAVA虚拟机

public class GlobalCounter {
    public final static int initial_value = 0;
    private static int count = initial_value;
    public static synchronized void reset() { set(initial_value); }
    public static synchronized void set(int i) { count = i; }
    public static synchronized void inc() { ++count; }
    public static synchronized void dec() { --count; }
    public static int value() { return count; }
}