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import java.util.ArrayList;
import java.util.Iterator;
public class ArrayListTest
{
  //@SuppressWarnings("unchecked")    //×¢½â
  public static void main(String args[])
  {
        
         ArrayList<Person> al = new ArrayList<Person>();
         al.add(new Person("zhangsan",19));
         al.add(new Person("wangwu",21))


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