import java.util.ArrayList; import java.util.Collection; import java.util.Iterator; public class Test2 { public static void main(String[] args) { //集合 Collection<String> collection = new ArrayList<>(); collection.add("a"); collection.add("b"); collection.add("c"); collection.add("d"); System.out.println(collection); collection.remove("b"); System.out.println(collection); //迭代器 Iterator<String> iterator = collection.iterator(); while (iterator.hasNext()) { String next = iterator.next(); System.out.println(next); } System.out.printf("hello,world"); } }
java 集合和迭代器
天生我材必有用,千金散尽还复来