Making text in a JLabel dynamically resize

Question

I have an array of Java Swing JLabels. The user of my program can add a new JLabel to the JFrame, and I want to make the size of the text in the JLabel change based on the number of JLabels in the frame. If there are too many JLabels, the text will still fit and will not overlap other JLabels.

Answer 1

Doesnt look pretty, but if that is what you want, here's a quick piece of code to compile and run. Feel free to extract whatever code you need for your project. Have fun, - M.S.

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;

public class LabelSize extends JPanel {     

    private Font        font;
    private JPanel      panel;
    private JLabel      label = new JLabel ("Font Size Adapter Label", JLabel.CENTER);
    private JTextField  tf = new JTextField ("Type in text for new label here and hit [Enter]");

    public LabelSize() {         
        super (new BorderLayout());
        panel = labelPanel();
        add (panel, "North");
        add (tf, "South");
        tf.addActionListener (new ActionListener () {
            public void actionPerformed (ActionEvent e) {
                label.setText (tf.getText());
                label.setFont (font);
                int labelW = (int) Math.ceil (label.getPreferredSize().getWidth());
                int maxWidth = (int) Math.floor (panel.getSize().getWidth());
                if (labelW <= maxWidth)
                    return;
                for (int k = 1 ; labelW > maxWidth ; k++) {
                    Font labelFont = font.deriveFont (font.getSize() - k*1.0f);
                    label.setFont (labelFont);
                    labelW = (int) Math.ceil (label.getPreferredSize().getWidth());
        }}});
    } 

    private JPanel labelPanel() {
        JPanel lp = new JPanel(new BorderLayout());
        lp.setPreferredSize (new Dimension (270,30));
        lp.add (label, "North");
        font = label.getFont();
        return lp;
    }

    public static void main (String[] args) {
        JFrame lsFrame = new JFrame ("Lfit");
        lsFrame.add (new LabelSize());
        lsFrame.pack();
        lsFrame.setDefaultCloseOperation (JFrame.EXIT_ON_CLOSE);
        lsFrame.setVisible(true);
}}