自定义泛型的数组List

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];
	}

}