数组模拟ArrayList

public class myArrayList {

    String[] a1=new String[5];
int size;
//public boolean[] get;
    public void add(String a){
if (a1.length==size){


            String[] temp=new String[a1.length+5];

            System.arraycopy(a1,0,temp,0,a1.length);
a1=temp;

        }
a1[size++]=a;

    }
public int size(){
return size;

    }
public String get(int i){
return a1[i];

    }

}