NoSuchElementException lecture fichier
Bonjour , voici le code de lecture de fichier.
Je mets bien le fichier test.txt à la bonne place.
Et pourtant j'ai une erreur exception :
Code:
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| run:
Exception in thread "main" java.util.NoSuchElementException
at java.util.Scanner.throwFor(Scanner.java:838)
at java.util.Scanner.next(Scanner.java:1347)
at Main.processLine(Main.java:50)
at Main.processLineByLine(Main.java:25)
at Main.main(Main.java:8)
Java Result: 1
BUILD SUCCESSFUL (total time: 0 seconds) |
Code:
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| import java.io.*;
import java.util.Scanner;
public final class Main {
public static void main(String... aArgs) throws FileNotFoundException {
Main parser = new Main("C:\\Temp\\test.txt");
parser.processLineByLine();
log("Done.");
}
/**
* @param aFileName full name of an existing, readable file.
*/
public Main(String aFileName){
fFile = new File(aFileName);
}
/** Template method that calls {@link #processLine(String)}. */
public final void processLineByLine() throws FileNotFoundException {
Scanner scanner = new Scanner(fFile);
try {
//first use a Scanner to get each line
while ( scanner.hasNextLine() ){
processLine( scanner.nextLine() );
}
}
finally {
//ensure the underlying stream is always closed
scanner.close();
}
}
/**
* Overridable method for processing lines in different ways.
*
* <P>This simple default implementation expects simple name-value pairs, separated by an
* '=' sign. Examples of valid input :
* <tt>height = 167cm</tt>
* <tt>mass = 65kg</tt>
* <tt>disposition = "grumpy"</tt>
* <tt>this is the name = this is the value</tt>
*/
protected void processLine(String aLine){
//use a second Scanner to parse the content of each line
Scanner scanner = new Scanner(aLine);
scanner.useDelimiter("=");
if ( scanner.hasNext() ){
String name = scanner.next();
String value = scanner.next();
log("Name is : " + quote(name.trim()) + ", and Value is : " + quote(value.trim()) );
}
else {
log("Empty or invalid line. Unable to process.");
}
//(no need for finally here, since String is source)
scanner.close();
}
// PRIVATE //
private final File fFile;
private static void log(Object aObject){
System.out.println(String.valueOf(aObject));
}
private String quote(String aText){
String QUOTE = "'";
return QUOTE + aText + QUOTE;
}
} |
merci de votre aide.