Java Reference
In-Depth Information
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// Fig. 15.3: CreateTextFile.java
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// Writing data to a sequential text file with class Formatter.
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import
java.io.FileNotFoundException;
import
java.lang.SecurityException;
import
java.util.Formatter;
import
java.util.FormatterClosedException;
import
java.util.NoSuchElementException;
import
java.util.Scanner;
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public class
CreateTextFile
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{
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private static
Formatter output;
// outputs text to a file
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public static void
main(String[] args)
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{
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openFile();
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addRecords();
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closeFile();
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}
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// open file clients.txt
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public static void
openFile()
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{
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try
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{
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output =
new
Formatter(
"clients.txt"
);
// open the file
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}
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catch
(SecurityException securityException)
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{
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System.err.println(
"Write permission denied. Terminating."
);
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System.exit(
1
);
// terminate the program
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}
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catch
(FileNotFoundException fileNotFoundException)
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{
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System.err.println(
"Error opening file. Terminating."
);
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System.exit(
1
);
// terminate the program
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}
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}
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// add records to file
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public static void
addRecords()
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{
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Scanner input =
new
Scanner(System.in);
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System.out.printf(
"%s%n%s%n? "
,
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"Enter account number, first name, last name and balance."
,
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"Enter end-of-file indicator to end input."
);
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while
(input.hasNext())
// loop until end-of-file indicator
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{
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try
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{
Fig. 15.3
|
Writing data to a sequential text file with class
Formatter
. (Part 1 of 2.)
