我是Java编程的初学者，而且只是编程。我已经编写了一个程序来打印表格，直到特定的数字。
但是，我想以横向方式打印表格，而不是它是一个巨大的列表。我该如何做到这一点？
这是我的代码。
import java.util.Scanner;
public class Learning {
public static void main(String[] args) {
/*
* To create a program where it prints the tables till twenty
*/
Scanner input = new Scanner(System.in);
System.out.println("Enter till when do you want the tables(max 20): ");
int number = input.nextInt();
if (number > 20 || number < 2) {
System.out.println("You entered a wrong number!!");
System.exit(1);
}
for (int i = 2; i <= number; i++) {
for (int j = 1; j <= 10; j++) {
System.out.printf("%d X %d = %d\n", i, j, (i * j));
}
System.out.println();
}
}
}
答案 0 :(得分：2)
如果您不想将每个条目放在单独的行中，则必须删除“\ n”
for (int j = 1; j <= 10; j++) {
System.out.printf("%d X %d = %d\n", i, j, (i * j)); // <<<<< the \n here
}
并将其替换为适合您的空格或其他任何内容。
如果我误解了这个问题，请告诉我，我会尝试重做：D
编辑：
如果您插入\ t并取4个数字，您将获得：
2 X 1 = 2 2 X 2 = 4 2 X 3 = 6 2 X 4 = 8 2 X 5 = 10 2 X 6 = 12 2 X 7 = 14 2 X 8 = 16 2 X 9 = 18 2 X 10 = 20
3 X 1 = 3 3 X 2 = 6 3 X 3 = 9 3 X 4 = 12 3 X 5 = 15 3 X 6 = 18 3 X 7 = 21 3 X 8 = 24 3 X 9 = 27 3 X 10 = 30
4 X 1 = 4 4 X 2 = 8 4 X 3 = 12 4 X 4 = 16 4 X 5 = 20 4 X 6 = 24 4 X 7 = 28 4 X 8 = 32 4 X 9 = 36 4 X 10 = 40
对于另一种解决方案，您必须将循环更改为：
for (int i = 1; i <= 10; i++) {
for (int j = 2; j <= number; j++) {
System.out.printf("%d X %d = %d\t", j, i, (i * j));
}
System.out.println();
}
使用数字20时，您将获得：
2 X 1 = 2 3 X 1 = 3 4 X 1 = 4 5 X 1 = 5 6 X 1 = 6 7 X 1 = 7 8 X 1 = 8 9 X 1 = 9 10 X 1 = 10 11 X 1 = 11 12 X 1 = 12 13 X 1 = 13 14 X 1 = 14 15 X 1 = 15 16 X 1 = 16 17 X 1 = 17 18 X 1 = 18 19 X 1 = 19 20 X 1 = 20
2 X 2 = 4 3 X 2 = 6 4 X 2 = 8 5 X 2 = 10 6 X 2 = 12 7 X 2 = 14 8 X 2 = 16 9 X 2 = 18 10 X 2 = 20 11 X 2 = 22 12 X 2 = 24 13 X 2 = 26 14 X 2 = 28 15 X 2 = 30 16 X 2 = 32 17 X 2 = 34 18 X 2 = 36 19 X 2 = 38 20 X 2 = 40
2 X 3 = 6 3 X 3 = 9 4 X 3 = 12 5 X 3 = 15 6 X 3 = 18 7 X 3 = 21 8 X 3 = 24 9 X 3 = 27 10 X 3 = 30 11 X 3 = 33 12 X 3 = 36 13 X 3 = 39 14 X 3 = 42 15 X 3 = 45 16 X 3 = 48 17 X 3 = 51 18 X 3 = 54 19 X 3 = 57 20 X 3 = 60
2 X 4 = 8 3 X 4 = 12 4 X 4 = 16 5 X 4 = 20 6 X 4 = 24 7 X 4 = 28 8 X 4 = 32 9 X 4 = 36 10 X 4 = 40 11 X 4 = 44 12 X 4 = 48 13 X 4 = 52 14 X 4 = 56 15 X 4 = 60 16 X 4 = 64 17 X 4 = 68 18 X 4 = 72 19 X 4 = 76 20 X 4 = 80
2 X 5 = 10 3 X 5 = 15 4 X 5 = 20 5 X 5 = 25 6 X 5 = 30 7 X 5 = 35 8 X 5 = 40 9 X 5 = 45 10 X 5 = 50 11 X 5 = 55 12 X 5 = 60 13 X 5 = 65 14 X 5 = 70 15 X 5 = 75 16 X 5 = 80 17 X 5 = 85 18 X 5 = 90 19 X 5 = 95 20 X 5 = 100
2 X 6 = 12 3 X 6 = 18 4 X 6 = 24 5 X 6 = 30 6 X 6 = 36 7 X 6 = 42 8 X 6 = 48 9 X 6 = 54 10 X 6 = 60 11 X 6 = 66 12 X 6 = 72 13 X 6 = 78 14 X 6 = 84 15 X 6 = 90 16 X 6 = 96 17 X 6 = 102 18 X 6 = 108 19 X 6 = 114 20 X 6 = 120
2 X 7 = 14 3 X 7 = 21 4 X 7 = 28 5 X 7 = 35 6 X 7 = 42 7 X 7 = 49 8 X 7 = 56 9 X 7 = 63 10 X 7 = 70 11 X 7 = 77 12 X 7 = 84 13 X 7 = 91 14 X 7 = 98 15 X 7 = 105 16 X 7 = 112 17 X 7 = 119 18 X 7 = 126 19 X 7 = 133 20 X 7 = 140
2 X 8 = 16 3 X 8 = 24 4 X 8 = 32 5 X 8 = 40 6 X 8 = 48 7 X 8 = 56 8 X 8 = 64 9 X 8 = 72 10 X 8 = 80 11 X 8 = 88 12 X 8 = 96 13 X 8 = 104 14 X 8 = 112 15 X 8 = 120 16 X 8 = 128 17 X 8 = 136 18 X 8 = 144 19 X 8 = 152 20 X 8 = 160
2 X 9 = 18 3 X 9 = 27 4 X 9 = 36 5 X 9 = 45 6 X 9 = 54 7 X 9 = 63 8 X 9 = 72 9 X 9 = 81 10 X 9 = 90 11 X 9 = 99 12 X 9 = 108 13 X 9 = 117 14 X 9 = 126 15 X 9 = 135 16 X 9 = 144 17 X 9 = 153 18 X 9 = 162 19 X 9 = 171 20 X 9 = 180
2 X 10 = 20 3 X 10 = 30 4 X 10 = 40 5 X 10 = 50 6 X 10 = 60 7 X 10 = 70 8 X 10 = 80 9 X 10 = 90 10 X 10 = 100 11 X 10 = 110 12 X 10 = 120 13 X 10 = 130 14 X 10 = 140 15 X 10 = 150 16 X 10 = 160 17 X 10 = 170 18 X 10 = 180 19 X 10 = 190 20 X 10 = 200
答案 1 :(得分：1)
您必须颠倒for循环的顺序，并将\n替换为\t以分隔两个表
for (int j = 1; j <= 10; j++)
{
for (int i = 2; i <= number; i++)
{
System.out.printf("%d X %d = %d\t", i, j, (i * j));
}
System.out.println();
}
number = 5
2 X 1 = 2 3 X 1 = 3 4 X 1 = 4 5 X 1 = 5
2 X 2 = 4 3 X 2 = 6 4 X 2 = 8 5 X 2 = 10
2 X 3 = 6 3 X 3 = 9 4 X 3 = 12 5 X 3 = 15
2 X 4 = 8 3 X 4 = 12 4 X 4 = 16 5 X 4 = 20
2 X 5 = 10 3 X 5 = 15 4 X 5 = 20 5 X 5 = 25
2 X 6 = 12 3 X 6 = 18 4 X 6 = 24 5 X 6 = 30
2 X 7 = 14 3 X 7 = 21 4 X 7 = 28 5 X 7 = 35
2 X 8 = 16 3 X 8 = 24 4 X 8 = 32 5 X 8 = 40
2 X 9 = 18 3 X 9 = 27 4 X 9 = 36 5 X 9 = 45
2 X 10 = 20 3 X 10 = 30 4 X 10 = 40 5 X 10 = 50