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1.在对象和类中,我学习了定义类和创建对象的方法,比如定义getArea()和get perimeter();还包括定义静态变量和添加修饰符static,以及添加private包装的时候。在给一个方法传递对象参数的时候,比如printCircle(myCircle)就是把myCircle的值传递给printCircle方法,这是对Circle对象的引用值;同时也可以用这个来调用构造函数,比如this.radius=radius



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