商场推出幸运抽奖活动的java初级代码编写

int custNO;//客户会员号（说明:customer指客户）
System_out.println ("请输入四位会员卡号:");//输入会员卡号
Scanner input = new Scanner(System_in);
custNO = input.nextInt();
if (custNo > 1000){
//获得每位数字(a/b是除a%b是取余)
int gewei = custNO % 10 ; //分解获得个位数 1001 %10 ==1
int shiwei = custNO /10 %10 ; //分解获得十位数 //1234 /10 % 10 = 123 %10 =3 (1234 /10 = 123.4 % 10 )
int baiwei = custNO /100 %10 ;//分解获得百位数
int qianwei = custNO /1000 ; //分解获得千位数
}
//计算数字之和
int sum = gewei + shiwei + baiwei + qianwei ;
System_out.println ("会员卡号"+custNO +"各位之和:" + sum );

就是初级控制台程序？

BufferedReader strin=new BufferedReader(new InputStreamReader(System_in));
System_out.println("请输入会员号：");
boolean ck = false;
String str = strin.readLine();
do{
ck = false;
Pattern pattern = Pattern_compile("[0-9]*");
Matcher isNum = pattern.matcher(str);
if( !isNum_matches()||str.length()!=4 ){ //验证输入会员号是否合法
System_out.println("会员号格式不正确！");
System_out.println("请再次输入会员号：");
str = strin.readLine();
ck = true;
}
}while(ck);
int num = Integer.parseInt(str);
int a = num/1000;
int b = num%1000/100;
int c = num%100/10;
int d = num%10;
if((a+b+c+d)>20){
System_out.println("恭喜中奖!");
}else{
System_out.println("谢谢参与!");
}