java - 12乘12乘法表的格式

Question

我的程序输出如下表格：

1  2  3  4  5  6  7  8  9  10  11  12  
2  4  6  8  10  12  14  16  18  20  22  24  
3  6  9  12  15  18  21  24  27  30  33  36  
4  8  12  16  20  24  28  32  36  40  44  48  
5  10  15  20  25  30  35  40  45  50  55  60  
6  12  18  24  30  36  42  48  54  60  66  72  
7  14  21  28  35  42  49  56  63  70  77  84  
8  16  24  32  40  48  56  64  72  80  88  96  
9  18  27  36  45  54  63  72  81  90  99  108  
10  20  30  40  50  60  70  80  90  100  110  120  
11  22  33  44  55  66  77  88  99  110  121  132  
12  24  36  48  60  72  84  96  108  120  132  144

我需要让它看起来好一点。需要你的帮助。

这是我的代码：

int a;
int b;
for (a=1; a<=12; ++a)
{
    for (b=1; b<=12; ++b)
    {
        System.out.print(a*b+"  ");  
    }
    System.out.println();
}

score 5 · Accepted Answer

使用字符串System.out.printf("")。喜欢：

System.out.printf("%4d",a*b);

或者

System.out.print(String.format("%4d",a*b));

score 4 · Accepted Answer

4

于 2013-09-28T09:09:22.580 回答

score 0 · Accepted Answer

0

尝试给制表符空间

System.out.print(a * b + "\t");

于 2013-09-28T09:07:31.897 回答

score 0 · Accepted Answer

尝试

public static void main(String[] args) {
    int a;
    int b;
    int sum;
    for (a = 1; a <= 12; ++a) {
        for (b = 1; b <= 12; ++b) {
            sum = a * b;
            System.out.print(sum);
            if(sum < 10){
                System.out.print("    ");
        }else if(sum >= 100){
            System.out.print("  ");
        }else if(sum >= 10){
            System.out.print("   ");
            }

        }
        System.out.println();
    }
}

或者

public static void main(String[] args) {
    int a;
    int b;
    for (a = 1; a <= 12; ++a) {
        for (b = 1; b <= 12; ++b) {
            System.out.printf("%4d", (a*b));
        }
        System.out.println();
    }
}

score 0 · Accepted Answer

0

利用：

System.out.print(a*b+"\t");

它使用一个转义序列，将适当地标记每个值。

于 2019-10-11T20:40:54.797 回答

score 0 · Accepted Answer

这是代码，

public class MultiplicationTableJava 
{
    public static void main(String[] args) 
    {
        // here we are initializing and setting table size
        final int tableNum = 12;
        // here we are printing row
        System.out.print("   |");
        for(int a = 1; a <= tableNum; a++)
            System.out.print(addSpace(a) + " ");
        System.out.println();
        // here we are printing separator
        System.out.print("---+");
        for(int a = 1; a <= tableNum; a++)
            System.out.print("----");
        System.out.println();
        // now printing main table
        for(int a = 1; a <= tableNum; a++) 
        {
            System.out.print(addSpace(a) + "|");
            for(int b = 1; b <= tableNum; b++) 
            {
                System.out.print(addSpace(a * b) + " ");
            }
            System.out.println();
        }
    }
    
    public static String addSpace(int y) 
    {
        String str = new String();
        if(y < 10) str = "  " + y;
        else if(y < 100) str = " " + y;
        else str = "" + y;
        return str;
    }
}

有关乘法表 java 程序的更多信息，请参阅此资源。

score 0 · Accepted Answer

我建议使用像这里这样的表

response.getWriter().append("<table><body>");
        for (int i = 1; i < width +1 ; i++) {
            response.getWriter().append("<tr>");
            for (int j = 1; j < height +1; j++) {
                response.getWriter().append("<td>").append(String.format("%4d",i*j)).append("</td>");
            }
            response.getWriter().append("</tr>");
        }
        response.getWriter().append("</body></table>");

score -1 · Accepted Answer

package rest;
public class doubt {
    public static void main (String[] args) {
        for(int i=1;i<=3;i++)
        {   
            for(int j=1;j<=3;j++)
            {
                System.out.printf("%4d",i*j);//+i*j+" ");
            }
            System.out.println("\n");
        }
    }     
 }

score -1 · Accepted Answer

public class JavaApplication21 {    
    public static void main(String[] args) {
        for(int i=1;i<13;i++) {
            for(int j=1;j<=12;j++) {
                System.out.printf("%d x %d = %d  \n",i,j,(i*j));
                System.out.println();
            }
        }
    }
}

java - 12乘12乘法表的格式

9 回答 9

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