摘要： layout可以叠加效果 import java.awt.*; import java.awt.event.WindowAdapter; import java.awt.event.WindowEvent; public class HomeWork { public static void mai 阅读全文

摘要： public class Recursive { public static void main(String[] args) { long sum = fun(10); System.out.println(sum); } private static int fun(int i) { //终止条 阅读全文