in = new BufferedReader( new FileReader(storageFile)) ; // error

[nurkhasanah]

hi, i've a code below :


/*
* loadTxt.java
*
* Created on May 7, 2010, 12:43 AM
*
* To change this template, choose Tools | Template Manager
* and open the template in the editor.
*/

package tampilan;
import java.util.ArrayList;
import java.io.BufferedReader;
import java.io.FileReader;
import java.io.IOException;
import java.io.*;
import java.util.*;
import java.lang.*;
/**
*
* @author nur
*/
public class loadTxt {

/** Creates a new instance of loadTxt */
public loadTxt() {
String storageFile;
ArrayList creatureList = new ArrayList() ;
BufferedReader in = null ;
try {
in = new BufferedReader( new FileReader(storageFile)) ; // error on this row :(
String line = "" ;
while( ( line = in.readLine() ) != null )
{
StringTokenizer stok = new StringTokenizer( line, "\t" ) ;
if( stok.hasMoreTokens() )
{
String alienType = stok.nextToken() ;
System.out.println(alienType);
/*AlienCreature creature = (AlienCreature)Class.forName( alienType ).newInstance() ;
creature.readFromTokenizer( stok ) ;
creatureList.add( creature ) ;*/
}
}
}
catch( Exception ex )
{
// catch all exceptions as one. This is bad form imho
ex.printStackTrace() ;
}
finally
{
try { if( in != null ) in.close() ; } catch( IOException ex ) {}
}

}

}



it show error :(
i don't know what's wrong with my code
could you help please.. ?

[j2me64]

String storageFile;

the storageFile has not been initialized, so you can't use the string storageFile at line 30 :). i used the code above and myfile.txt was readed. the only changes i made is the assignment to storageFile and i added the main method so that i can run the class loadTxt. if you want to keep the class more generic you can pass a string that contains the path and file you want to read to the constructor and then assign the argument to storageFile.

import java.util.ArrayList;
import java.io.BufferedReader;
import java.io.FileReader;
import java.io.IOException;
import java.io.*;
import java.util.*;
import java.lang.*;

/**
 * 
 * @author nur
 */
public class loadTxt {

	/** Creates a new instance of loadTxt */
	public loadTxt() {
		String storageFile = "c:/temp/myfile.txt";
		ArrayList creatureList = new ArrayList();
		BufferedReader in = null;
		try {
			in = new BufferedReader(new FileReader(storageFile)); // error on
																	// this row
			String line = "";
			while ((line = in.readLine()) != null) {
				StringTokenizer stok = new StringTokenizer(line, "\t");
				if (stok.hasMoreTokens()) {
					String alienType = stok.nextToken();
					System.out.println(alienType);
					/*
					 * AlienCreature creature = (AlienCreature)Class.forName(
					 * alienType ).newInstance() ; creature.readFromTokenizer(
					 * stok ) ; creatureList.add( creature ) ;
					 */
				}
			}
		} catch (Exception ex) {
			// catch all exceptions as one. This is bad form imho
			ex.printStackTrace();
		} finally {
			try {
				if (in != null)
					in.close();
			} catch (IOException ex) {
			}
		}

	}

	public static void main(String[] args) {
		loadTxt l = new loadTxt();
	}
}