Getting JTextArea to display fixed-width font without antialiasing

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Does anybody know how to get JTextArea to display a fixed size font on all platforms?

I want to make a simple code editor with save/open functionality, which is simp

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死守一世寂寞

2020-12-10 14:02
I came close to a solution by using JTextPane instead of JTextArea by setting the content type of the JTextPane to text/html and setting the text as a html content.
```
JtextPane textPane;
String text;

// initialization

textPane.setContentType("text/html");
textPane.setText(""
        + "<html>"
        + "<body>"
        + "<p>"
        + "<tt>"+text.replaceAll(" ", "&nbsp;").replaceAll("\n", "<br>")+"</tt>"
        + "</p>"
        + "</body>"
        + "</html>"                
        + "");
```
<tt> tag is making the text monospaced and all white spaces and new line characters of the text have replaced with html space entity and <br> tag, respectively. I tested the output in both Windows and Ubuntu OSes and they were same.
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春和景丽

2020-12-10 14:24

You can use the logical font "monospaced". While it guarantees to have a font that has the same size for all characters, it won't be the same on all platform.

import java.awt.Font;

import javax.swing.JFrame;
import javax.swing.JScrollPane;
import javax.swing.JTextArea;
import javax.swing.SwingUtilities;

public class TestTextArea {

    private void initUI() {
        JFrame frame = new JFrame("test");
        frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
        JTextArea textArea = new JTextArea(24, 80);
        textArea.setFont(new Font("monospaced", Font.PLAIN, 12));
        frame.add(new JScrollPane(textArea));
        frame.pack();
        frame.setVisible(true);
    }

    public static void main(String[] args) {
        SwingUtilities.invokeLater(new Runnable() {
            @Override
            public void run() {
                new TestTextArea().initUI();
            }
        });

    }

}

Alternatively, you could look up a "free" font which meets your need, embed that font in with code and load it with java.awt.Font.createFont(int, InputStream).

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