set循环遍历删除特定元素

使用Iterator迭代器

public class Demo {
    public static void main(String[] args) {
        Set<Object> obj = new HashSet<Object>();
        obj.add("a");
        obj.add("b");
        obj.add("c");
        System.out.println("移除前：" + obj.toString());
Iterator<Object> it = obj.iterator();
        for(int i=0; i<obj.size(); i++){
            System.out.println(i);
            Object name = it.next();
            if("a".equals(name) || "b".equals(name)){
      it.remove();
                i--;
            }
        }
        System.out.println("移除后： " + obj.toString());
    }
}