java基础入门-----ArrayList练习1

import java.util.*;

class ArrayList练习1    //除去ArrayList重复的元素
{
public static void main(String[] args)
{
ArrayList al = new ArrayList();
al.add("java01");
al.add("java02");
al.add("java01");
al.add("java02");
al.add("java01");
al.add("java03");

sop(singleElement(al));

}
public static void sop(Object obj)
{
System.out.println(obj);
}
public static ArrayList singleElement(ArrayList al)
{
//定义一个临时容器
ArrayList temal = new ArrayList();

Iterator it = al.iterator();

while(it.hasNext())
{
Object obj = it.next();

if(!temal.contains(obj))
temal.add(obj);
}

return temal;
}
}