Prentice.Hall.Introduction.to.Java.Programming,.Brief.Version.9th.(2014).[sharethefiles.com]

characters, Cp939 for Japanese characters, Cp933 for Korean characters, and
Cp838 for Thai characters.
The following code in Listing 35.8 creates a file using the GB18030 encoding
(line 8). You have to read the text using the same encoding (line 12). The
output is shown in Figure 35.12a.
Listing 35.8 EncodingDemo.java
1 import java.util.*;
2 import java.io.*;
3 import javax.swing.*;
4
5 public class EncodingDemo {
6 public static void main(String[] args)
7 throws IOException, FileNotFoundException {
8 PrintWriter output = new PrintWriter("temp.txt", "GB18030");
9 output.print("\u6B22\u8FCE Welcome \u03b1\u03b2\u03b3");
10 output.close();
11
12 Scanner input = new Scanner(new File("temp.txt"), "GB18030");
13 JOptionPane.showMessageDialog(null, input.nextLine());
14 }
15 }
(a) Using GB18030 encoding
(b) Using default encoding
Figure 35.12
You can specify an encoding scheme for a text file.
If you don’t specify an encoding in lines 8 and 12, the system’s default
encoding scheme is used. The US default encoding is ASCII. ASCII code uses 8
bits. Java uses the 16-bit Unicode. If a Unicode is not an ASCII code, the
character '?' is written to the file. Thus, when you write \u6B22 to an ASCII
file, the ? character is written to the file. When you read it back, you will
see the ? character, as shown in Figure 35.12b.
To find out the default encoding on your system, use
System.out.println(System.getProperty("file.encoding"));
The default encoding name is Cp1252 on Windows, which is a variation of ASCII.
Key Terms
locale 7
resource bundle
file encoding scheme
32