问题:
A . At most one listener of each type can be registered with a component.
B . Mouse motion listeners can be registered on a List instance.
C . There exists a class named ContainerEvent in package java.awt.event.
D . There exists a class named MouseMotionEvent in package java.awt.event.
E . There exists a class named ActionAdapter in package java.awt.event.
● 参考解析
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