高质量Java程序设计　源代码

				package net.betterjava.design.override;
				
				/**
				 * override sample, Child override Base.Iam(Base) method
				 */
				public class Base {
					void Iam(Base b) {
						System.out.println("Base;Overload");
					}
					void Iam(Child c) {
						System.out.println("Child;Overload");
					}
					public static void main(String[] args) {
						Base[] test = new Base[] { new Base(), new Child()};
						for (int i = 0; i < test.length; i++)
							test[i].Iam(test[i]);
					}
				}
				
				class Child extends Base {
					void Iam(Base b) {
						System.out.println("Base;Override");
					}
				}