JAVA项目中，创建由4行11列组成的显示表

Question

import javax.swing.JOptionPane;
public class lab {

    public static void main(String[] args) { //don't comment this out
        // TODO Auto-generated method stub


        String output = "";

        for (int x = 1; x <= 4; x++)
        {
            for (int y = 0; y <= 9; y++)
            {
                output = output + x*y + "  ";
            }
            output = output + "\n";
        }

        JOptionPane.showMessageDialog(null,output);
    }
}

//我需要创建一个程序来显示一个表格

1 0 1 2 3 4 5 6 7 8 9
2 0 2 4 6 8 10 12 14 16 18
3 0......................
4 0....................... 

到目前为止，我的程序从0开始。我想知道如何从1,2,3,4的第一列开始，然后从0,0,0,0的第二列开始编码

Answer 1

试着这样做：

public class test  {
    public static void main(String args[]) {
        String output = "";

        for (int x =1; x <= 4; x++) {
            output += x + " ";
            for (int y = 0; y <= 9; y++) {

                output = output + x*y + "  ";

            }
            output = output + "\n";
        }
        JOptionPane.showMessageDialog(null,output);
    }
}