How do i make the output come in different columns?

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Im making a program that outputs, the numbers 1-10 in one column, the square of this in another and in the third the number in cube.

How can i make the program a lit

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眼角桃花

2020-12-21 19:35

Formatting a String using HTML is an excellent and often overlooked idea (+1 to Maroun)

Something else that often gets over looked is the ability for JOptionPane to use JComponents

enter image description here

import java.awt.EventQueue;
import javax.swing.JOptionPane;
import javax.swing.JScrollPane;
import javax.swing.JTable;
import javax.swing.UIManager;
import javax.swing.UnsupportedLookAndFeelException;
import javax.swing.table.DefaultTableModel;

public class TableOptionPane {

    public static void main(String[] args) {
        new TableOptionPane();
    }

    public TableOptionPane() {
        EventQueue.invokeLater(new Runnable() {
            @Override
            public void run() {
                try {
                    UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
                } catch (ClassNotFoundException | InstantiationException | IllegalAccessException | UnsupportedLookAndFeelException ex) {
                }

                Integer[][] values = new Integer[10][3];
                StringBuilder string = new StringBuilder();
                for (int i = 1; i < 11; i++) {
                    values[i - 1][0] = i;
                    values[i - 1][1] = i * i;
                    values[i - 1][2] = i * i * i;
                }
                DefaultTableModel model = new DefaultTableModel(values, new Object[]{"i", "i * i", "i * i * i"});
                JTable table = new JTable(model);
                JOptionPane.showMessageDialog(null, new JScrollPane(table), "Data", JOptionPane.PLAIN_MESSAGE);
            }
        });
    }
}

The has the added benifit of providing a bases from which you could support such operations as "copy" or even edibility of the data, if such things were of use to you...

You may find more details at How to use Dialogs

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孤城傲影

2020-12-21 19:48

It's better to use JTable in your case.

But you can use HTML Tags and do something like this:

builder.append("<html><table border=1><tr><td>column1</td><td>column2</td><td></tr>");
string.append("<tr><td>");
string.append(.....);
string.append("</td><td>");
...
string.append("</td></tr>");
string.append("</table></html>");

~~Or:~~

~~textArea.setText("column1\t\tcolumn2\n"); textArea.append("column1\t\tcolumn2\n"); textArea.append(...);~~

~~But it's not recommended since your text can go out of the column.~~

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