do { check = 0; try { start.input(); } catch(Exception e) { System.out.println("输入错误!请重新输入!"); check = 1; } } while(check);
boolean check; do { check = false; try { start.input(); } catch(Exception e) { System.out.println("输入错误!请重新输入!"); check = true; } } while(check);