1、与普通秋沙鸭相比，中华秋沙鸭的两侧有很明显的鳞纹状，黑白相间的非常显眼；而中华秋沙鸭两侧就没有这种纹，它的两侧是白色的羽毛，这一点是非常明显的差别。还有就是中华秋沙鸭的脖子是深绿色或者棕褐色的，而普
I have been studying internals of Java for quite some time. I am curious to learn and understand how threading/locking takes place in Java.
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