java - 使用 JOptionPane 创建乘法表

Question

我有一个明天要交的作业，我完成了它，但我总是出错。嗯，这不完全是错误，因为我的输出不是我老师想要的输出。

我的老师要我使用 JOptionPane 创建一个乘法表

这就是我目前所拥有的:

import javax.swing.JOptionPane;

public class assign3 {

public static void main(String[] args) {

        String Boundary1 = JOptionPane.showInputDialog(null, "Please enter the first boundary of the multiplication table.");
        String Boundary2 = JOptionPane.showInputDialog(null, "Please enter the second boundary of the multiplication table.");

        int X = Integer.parseInt(Boundary1);
        int Y = Integer.parseInt(Boundary2);
        int j = 1;
        String Result = "";
        int x = 1;

        while (x <= X){
            for(int i = 1;i<= Y; i++ ){
                j = i * x;
                Result = Result + j + "    ";
            }
            x++;
            Result = Result + "\n";
        }
        JOptionPane.showMessageDialog(null, Result);
    }
}

我的输出显示如下。

https://www.dropbox.com/s/ulp1gj9sqi94d3a/IMG_20140114_162054.jpg

但是我的老师希望输出像这样显示。

https://www.dropbox.com/s/6gtexqoj3rs7xvl/IMG-20140114-WA0000.jpg

我的代码在数字之间没有正确的间距，我一直试图以某种方式修复它，但没有成功。

Answer 1

一个解决方案(假设 result 已经有需要的制表符(\t)):

JTextArea jf=new JTextArea(result);

jf.setEditable(false);
jf.setOpaque(false);

JOptionPane.showMessageDialog(null, jf);

编辑:

public static void main(String[] args) {

        String Boundary1 = JOptionPane.showInputDialog(null, "Please enter the first boundary of the multiplication table.");
        String Boundary2 = JOptionPane.showInputDialog(null, "Please enter the second boundary of the multiplication table.");

        int X = Integer.parseInt(Boundary1);
        int Y = Integer.parseInt(Boundary2);
        int j = 1;
        String Result = "";
        int x = 1;

        while (x <= X) {
            for (int i = 1; i <= Y; i++) {
                j = i * x;
                Result = Result + j + "\t";
            }
            x++;
            Result = Result + "\n";
        }
        JTextArea jt=new JTextArea(Result);
        jt.setEditable(false);
        jt.setOpaque(false);
        jt.setTabSize(3);
        JOptionPane.showMessageDialog(null, jt);
    }

O/P: