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  1. #1
    Registered User
    Join Date
    Mar 2003
    Posts
    10

    how to read file ?

    I don't know how t o read a file in j2me?
    Can anybody help me?

  2. #2
    Nokia Developer Expert
    Join Date
    Mar 2003
    Posts
    382
    Hello

    While MIDP provides methods for loading Images, it doesn't include a specific mechanism for loading files of arbitrary types. There's a simple workaround, though, that's based on three straightforward things you can do:

    You can package any type of file in the JAR file that makes up your MIDlet suite.
    You can open an InputStream to any file in your res directory.
    You can read a resource file using the getResourceAsStream() method.
    This example reads a text file into a StringBuffer, but you could easily modify it to read other types of files, including those containing binary data.

    import java.io.*;
    import javax.microedition.midlet.*;
    import javax.microedition.lcdui.*;

    public class ReadFile extends MIDlet {
    public void startApp() {

    try {
    Class c = this.getClass();
    InputStream is = c.getResourceAsStream("/thisfile.txt");
    StringBuffer str = new StringBuffer();
    byte b[] = new byte[1];

    while ( is.read(b) != -1 ) {
    str.append(new String(b));
    }
    is.close();
    System.out.println(str);
    }
    catch (IOException e) {
    e.printStackTrace();
    }
    }

    public void destroyApp(boolean b) {}

    public void pauseApp() {}
    }

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