摘要:
import java.util.ArrayList; public class Main { public static void main(String[] args) { boolean result = false; ArrayList arr = new ArrayList<>(); // 阅读全文
摘要:
import java.util.HashMap; import java.util.Map; public class Test { public static void main(String[] args){ Map<String,String> m = new HashMap(); m.pu 阅读全文