关于动态数组的泛型实现

package data;

public class DynamicArray<T extends Comparable<T>> {
short index;
Object[] datas;

public DynamicArray(){
index=0;
datas  = new Object[2];
}
void addData(T a){
System.out.println("当前数组大小:"+datas.length);
if(index>=datas.length-1){
Object[] tempData = new Object[datas.length*2];
System.arraycopy(datas, 0, tempData, 0, datas.length);
datas = tempData;
}

datas[index]=a;

System.out.println("curIndex:"+index);
index++;
}
void addSort(T a){
System.out.println("当前数组大小:"+datas.length);
if(index>=datas.length-1){
Object[] tempData = new Object[datas.length*2];
System.arraycopy(datas, 0, tempData, 0, datas.length);
datas = tempData;
}
short tempIndex = 0;
while(tempIndex<=index&& datas[tempIndex]!=null&&a.compareTo((T) datas[tempIndex])>0){
tempIndex++;
}

for(short temp=index;tempIndex<=temp;temp--){
datas[temp+1] = datas[temp];
}
datas[tempIndex] = a;
index++;
}
void display(){
System.out.println("current Data:");
for(short a=0;a<index;a++){
System.out.println(datas[a]);
}
}

}