Java 格式 12 x 12 乘法表
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format 12 by 12 multiplication table
提问by Timur
My program outputs the table like this:
我的程序输出这样的表：
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
I need to make it look a little better. Need your help.
我需要让它看起来好一点。需要你的帮助。
This is my code:
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();
}
回答by Masudul
Use String System.out.printf(""). Like:
使用字符串System.out.printf("")。喜欢：
System.out.printf("%4d",a*b);
or
或者
System.out.print(String.format("%4d",a*b));
回答by Suresh Atta
Try to give tab space
尝试给制表符空间
System.out.print(a * b + "\t");
回答by A4L
回答by sunysen
try
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();
}
}
or
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();
}
}
回答by Muhammad Taha Azam
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();
}
}
}
}
回答by Shiva
Here's the code,
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;
}
}
For more on multiplication table java program refer thisresource.
有关乘法表 java 程序的更多信息，请参阅此资源。
回答by Navneet Pandey
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");
}
}
}
回答by Sammy
Use:
用：
System.out.print(a*b+"\t");
System.out.print(a*b+"\t");
which uses a escape sequence that will tab each value appropriately.
它使用一个转义序列来适当地标记每个值。
回答by Seba89Waw
I sugest to use a table like here
我建议使用像这里这样的桌子
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>");
