How to display the different font items inside a JComboBox in Java?


A JComboBox is a subclass of JComponent class and it is a combination of a text field and a drop-down list from which the user can choose a value. A JComboBox can generate an ActionListener, ChangeListener, and ItemListener interfaces when the user actions on a combo box. We can display the different font styles inside a JComboBox by implementing the ListCellRenderer interface

Example

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

public class JComboBoxFontTest extends JFrame {
   private JComboBox fontComboBox;
   private String fontName[];
   private Integer array[];
   public JComboBoxFontTest() {
      setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
      GraphicsEnvironment ge = GraphicsEnvironment.getLocalGraphicsEnvironment();
      fontName = ge.getAvailableFontFamilyNames();
      array = new Integer[fontName.length];
      for(int i=1;i<=fontName.length;i++) {
         array[i-1] = i;
      }
      fontComboBox = new JComboBox(array);
      ComboBoxRenderar renderar = new ComboBoxRenderar();
      fontComboBox.setRenderer(renderar);
      setLayout(new FlowLayout());
      add(fontComboBox);
      setSize(400, 300);
      setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
      setLocationRelativeTo(null);
      setVisible(true);
   }
   private class ComboBoxRenderar extends JLabel implements ListCellRenderer {
      @Override
      public Component getListCellRendererComponent(JList list, Object value, int index, boolean isSelected, boolean cellHasFocus) {
         int offset = ((Integer)value).intValue() - 1;
         String name = fontName[offset];
         setText(name);
         setFont(new Font(name,Font.PLAIN,20));
         return this;
      }
   }
   public static void main(String args[]) {
      new JComboBoxFontTest();
   }
}

Output

raja
Published on 19-Jul-2019 18:37:00
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