Swing JLabel

This chapter discusses the following problems:

• How to create labels
• How to create labels with Chinese characters

Creating Labels

Problem: I want to create a label with a text string.

Solution: This is easy, just instantiate an object of javax.swing.JLabel, and add it to any container. Here is a sample program to show you how to do this:

/**
 * JLabelHello.java
 * Copyright (c) 2002 by Dr. Herong Yang
 */
import java.awt.*;
import javax.swing.*;
public class JLabelHello {
   public static void main(String[] a) {
      JFrame f = new JFrame();
      f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
      JLabel l = new JLabel("Hello world!");
      f.getContentPane().add(l);
      f.pack();      
      f.setVisible(true);
   }
}

Creating Labels with Chinese Characters

Problem: I want to create a label with Chinese characters.

Solution: Not very hard to do. See the following sample program:

/**
 * JLabelChinese.java
 * Copyright (c) 2002 by Dr. Herong Yang
 */
import java.awt.*;
import javax.swing.*;
public class JLabelChinese {
   public static void main(String[] a) {
      JLabel l = new JLabel();
      l.setFont(new Font("SimSun",Font.PLAIN, 12));
      l.setText("Hello world! - \u7535\u8111\u4F60\u597D\uFF01");
      JFrame f = new JFrame();
      f.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
      f.getContentPane().add(l);
      f.pack();
      f.setVisible(true);
   }
}

To run this program, you need to have SimSun font installed on your system. To verify this, search for \winnt\fonts\simsun.ttc if you are using Windows system.