泛型测试

public class _01_TestGeneric {

	public static void main(String[] args) {
		// TODO Auto-generated method stub
		// MyCollection myCollection = new MyCollection();
		// 让程序更加稳定
		MyCollection<String> myCollection = new MyCollection<String>();
		myCollection.set("Except", 0);
		myCollection.set("Shout", 3);
		
		// Integer integer = (Integer)myCollection.get(0);  // 类型检查，返回String类型，无法强转
		String string = (String)myCollection.get(3);
	}
}
class MyCollection<E>{  // <E>代表后期传入参数的类型
	Object[] object = new Object[5];
	public void  set(/*Object*/E object1,int index) {
		object[index] = object1; 
	}
	public /*Object*/E get(int index) {
		return (E)object[index];
	}
}