public class demo6 {
    public static void main(String[] args){
        //創建集合對象
        ArrayList list = new ArrayList();
        //賦值
        list.add("come");
        list.add("baby");
        list.add("baby");
        list.add("hello");
        list.add("come");
        list.add("come");
        //創建新的對象
        ArrayList list1 = new ArrayList();
        //遍歷舊的的集合
        java.util.Iterator it = list.iterator();
        while(it.hasNext()){
            String s = (String) it.next();
            if(!list1.contains(s)){
                list1.add(s);
            }
        }
        //遍歷新的集合並輸出
        for (int x=0;x<list1.size();x++){
            String s = (String) list1.get(x);
            System.out.println(s);
        }
    }
}

去除集合中重復字符串元素的案例