打印宾果板,Java
所以我试着用随机数打印一个宾果游戏板。每当我运行这个,我都会在一列中得到相同的数字。如何使每行打印不同的数字打印宾果板,Java,java,Java,所以我试着用随机数打印一个宾果游戏板。每当我运行这个,我都会在一列中得到相同的数字。如何使每行打印不同的数字 import java.util.Random; public class Bingo { public static void main(String[] args) { Random rand = new Random(); int bLow = 0, iLow = 16, nLow = 44, gLow = 59, oLow = 74;
import java.util.Random;
public class Bingo {
public static void main(String[] args) {
Random rand = new Random();
int bLow = 0, iLow = 16, nLow = 44, gLow = 59, oLow = 74;
int bLimit = 15, iLimit = 30, nLimit = 45, gLimit = 60, oLimit = 75;
int rB = rand.nextInt(bLimit-bLow) + bLow, rI = rand.nextInt(iLimit-iLow) +
iLow, rN = rand.nextInt(nLimit-nLow) + nLow, rG = rand.nextInt(gLimit-gLow) + gLow,
rO = rand.nextInt(oLimit-oLow) + oLow;
System.out.println("B\t|\tI\t|\tN\t|\tG\t|\tO");
System.out.println(rB + "\t|\t" + rI + "\t|\t" + rN + "\t|\t" + rG +
"\t|\t" + rO);
System.out.println(rB + "\t|\t" + rI + "\t|\t" + rN + "\t|\t" + rG +
"\t|\t" + rO);
System.out.println(rB + "\t|\t" + rI + "\t|\t" + rN + "\t|\t" + rG +
"\t|\t" + rO);
System.out.println(rB + "\t|\t" + rI + "\t|\t" + rN + "\t|\t" + rG +
"\t|\t" + rO);
System.out.println(rB + "\t|\t" + rI + "\t|\t" + rN + "\t|\t" + rG +
"\t|\t" + rO);
}
}
在每次使用之间,您不会更改
rB
的值。考虑使用循环。< /P>
for (int i = 0; i < 5; i++) {
int rB = rand.nextInt(bLimit-bLow) + bLow; // etc
System.out.println(rB + "\t|\t" + rI + "\t|\t" + rN + "\t|\t" + rG + "\t|\t" + rO); // etc
}
for(int i=0;i<5;i++){
int rB=rand.nextInt(bLimit bLow)+bLow;//等
System.out.println(rB+“\t |\t”+rI+“\t |\t”+rN+“\t |\t”+rG+“\t |\t”+rO)//等
}
一旦开始使用循环打印每一行,您将遇到的问题是,无法保证您不会得到重复的数字,而这对于宾果游戏来说是行不通的
您可以这样做—为每列创建有效数字的列表,并使用集合。shuffle
将其随机化
List<List<Integer>> board = new ArrayList<>();
for(int i=0, low=0; i<5; i++, low+=15)
{
List<Integer> col = new ArrayList<>();
board.add(col);
for(int j=1; j<=15; j++) col.add(low+j);
Collections.shuffle(col);
}
System.out.println("B\t|\tI\t|\tN\t|\tG\t|\tO");
for(int row=0; row<5; row++)
{
for(int col=0; col<5; col++)
{
System.out.printf("%2d", board.get(col).get(row));
if(col<4) System.out.printf("\t|\t");
}
System.out.println();
}
每次使用rB时,您都不会更改它的值。噢,我明白您的意思了,谢谢您使用某种循环
B | I | N | G | O
14 | 26 | 40 | 46 | 74
2 | 20 | 42 | 52 | 73
11 | 25 | 43 | 47 | 64
7 | 19 | 33 | 56 | 61
3 | 30 | 36 | 60 | 68