小编Alb*_*ong的帖子

在下面的代码中,即使我在同一个for循环中初始化,number也无法在行中找到变量.谁能告诉我为什么？number++number

import java.lang.Math;
import java.util.Random;

public class test
{
    public static void main( String [] args )
    {
        String cardNumber; 
        double cardRandom;
        int cardRandomNumber;
        String[] cardSelection = new String[10];

        for (int number = 0; number <=  9; );
        {
            Random ran = new Random();
            cardRandom = ran.nextInt(52 - 1 + 1) + 1;
            cardRandomNumber = (int) Math.round( cardRandom );

            if ( cardRandomNumber > 0 && cardRandomNumber <= 52 )
            { 
                cardNumber =  "card" + cardRandomNumber;
                System.out.println( …