利用下拉框控制字体格式

来源：互联网发布：在职研软件工程硕士编辑：程序博客网时间：2024/05/21 10:08

package swing;

import java.awt.BorderLayout;
import java.awt.EventQueue;
import java.awt.Font;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;

import javax.swing.JComboBox;
import javax.swing.JFrame;
import javax.swing.JLabel;
import javax.swing.JPanel;

public class ComboBoxTest {
public static void main(String[] args) {
  EventQueue.invokeLater(new Runnable() {
   @Override
   public void run() {
    ComboBoxFrame frame = new ComboBoxFrame();
    frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
    frame.setVisible(true);
   }
  });
}
}

class ComboBoxFrame extends JFrame {
public ComboBoxFrame() {
  this.setTitle("ComboBox Test");
  this.setSize(DEFAULT_WIDTH, DEFAULT_HEIGHT);

  label = new JLabel("The quick brown fox jumps over the lazy dog.");
  label.setFont(new Font("Serif", Font.PLAIN, DEFAULT_SIZE));
  this.add(label, BorderLayout.CENTER);

  faceCombo = new JComboBox();
  faceCombo.setEditable(true);
  faceCombo.addItem("Serif");
  faceCombo.addItem("SansSerif");
  faceCombo.addItem("Monospaced");
  faceCombo.addItem("Dialog");
  faceCombo.addItem("DialogInput");

  faceCombo.addActionListener(new ActionListener() {
   @Override
   public void actionPerformed(ActionEvent event) {
    label.setFont(new Font((String) faceCombo.getSelectedItem(), Font.PLAIN, DEFAULT_SIZE));
   }
  });

  JPanel comboPanel = new JPanel();
  comboPanel.add(faceCombo);
  this.add(comboPanel, BorderLayout.SOUTH);
}

public static final int DEFAULT_WIDTH = 300;
public static final int DEFAULT_HEIGHT = 200;

private JComboBox faceCombo;
private JLabel label;
private static final int DEFAULT_SIZE = 12;
}