public class MyArrayList<T> { private static final int DEFAULT_SIZE = 10; private Object[] elements; private int count = -1; public MyArrayList(){ elements = new Object[DEFAULT_SIZE]; } public int size(){ return count+1; } public void add(T t){ count++; if(count<elements.length){ elements[count] = t; }else{ Object[] newArray = new Object[elements.length+DEFAULT_SIZE]; for(int i=0;i<elements.length;i++){ Object o = elements[i]; newArray[i] = o; } elements = newArray; elements[count] = t; } } @SuppressWarnings("unchecked") public T get(int index){ return (T) this.elements[index]; } }
自定义泛型的数组List
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