java中怎么用system.in方法能够从控制台不停的输入...
怎么判断年份是否为闰年....要求从控制台输入,当输入不为正整数时，提示请输入错误，请输入正整数，然后能继续从控制台输入，知道输入为正整数为止...
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for example
- Java code
import java.util.*;public class Test { public static void main(String[] args) throws Throwable { Scanner sc = new Scanner(System.in); String buf; int year; GregorianCalendar c = new GregorianCalendar(); while (true) { System.out.print("请输入年([yyyy]格式):"); buf = sc.nextLine(); try { year = Integer.parseInt(buf); if (year < 0) {throw new Exception("负数");} System.out.println(c.isLeapYear(year) ? "闰年" : "不是闰年"); System.out.print("是否继续？(y/n):"); buf = sc.nextLine(); if ("y".equalsIgnoreCase(buf)) break; } catch (Exception e) { System.out.println("输入错误，请重输"); } } }}