去除ArrayList中的重复元素

/*
去除ArrayList重复元素


*/
class ArrayList
{
public static void main(String[] args){
al.add("01");
al.add("02");
al.add("03");
al.add("03");
al.add("04");
al.add("07");
al.add("02");


//System.out.println(al);
//al=singleElement(al);
//System.out.println(al);


}
public static ArrayList singleElement(ArrayList al){

//定义一个临时容器
ArrayList newAl=new ArrayList();


Iterator it=new Iterator();
while(it.hasNext()){

Object obj=it.next();

if(!newAl.contains(obj))
newAl.add(obj);

}
return newAl;
}
}