hi guys
i have a question here
is it possible to read from the data that is already stored in the recordstore and after that , print it to a text File(the text file is not created yet).i have try file connection and it doesnt work the way i wanted it to work....as it creates the files before i pass the data to it.
any help is appreciated .:)
i have try using a fileconnection API
however when i run the program it will hang due to a deadlock.( i place the coding in the commandAction method)
however if i shift the coding to some where else ,it will show the create-read file message before running the program, which i dont want
this is my code . i run in my ktoolbar, i have change the earlier code due to that error
i'm quite new to j2me so pls forgive me if it is a simple error
sorry i dont have that code.but this is the current error i have face and unable to solve it.
error i encounter :
C:\WTK22\apps\TCPClient\src\TCPClient.java:64: cannot find symbol
symbol : variable Connector
location: class TCPClient
FileConnection fileConnection = (FileConnection) Connector.open(filename, Connector.READ_WRITE);
^
C:\WTK22\apps\TCPClient\src\TCPClient.java:64: cannot find symbol
symbol : variable Connector
location: class TCPClient
FileConnection fileConnection = (FileConnection) Connector.open(filename, Connector.READ_WRITE);
^
import javax.microedition.midlet.*;
import javax.microedition.lcdui.*;
import java.io.*;
import javax.microedition.io.file.*;
public class TCPClient extends MIDlet implements CommandListener ,ItemCommandListener {
private Display display;
private Form form;
private Command exit, scgIndex,clear;
private TextField txtField;
private ChoiceGroup sImage;
private int sIndex;
private String strTxtField;
private Image image;
public TCPClient(){
display=Display.getDisplay(this);
form=new Form("TCPClient");
txtField=new TextField("type what u want to send","that's all folks",30,TextField.ANY);
sImage= new ChoiceGroup("pls select", Choice.EXCLUSIVE);
sImage.append("no image",null); //=0
sImage.append("image",null); //=1
exit=new Command("Exit",Command.EXIT,1); //1= highest priority,
scgIndex=new Command("select", Command.ITEM,2);//2 =second highest
clear=new Command("clear",Command.ITEM,2);
form.append(txtField);
form.append(sImage);
form.addCommand(clear);
form.addCommand(exit);
form.setCommandListener(this);
try{
Image image= Image.createImage("/send.jpg");
ImageItem imageItem=new ImageItem(null,image,Item.LAYOUT_CENTER ,null,Item.BUTTON);
imageItem.setDefaultCommand( new Command("Set", Command.ITEM, 1));
imageItem.setItemCommandListener(this);
form.append(imageItem);
}//end of try
catch(IOException e){System.out.println("button error");}
}// end of constructor
public void startApp(){
System.out.println("midlet started");
ItemStateListener listener = new MyStateListener();
form.setItemStateListener(listener);// register for events
display.setCurrent(form);
String filename = "file:///root1/hello.txt";
byte[] data = "hello world".getBytes();
FileConnection fileConnection = (FileConnection) Connector.open(filename, Connector.READ_WRITE);
if ( ! fileConnection.exists()) {
fileConnection.create();
}
OutputStream outputStream = fileConnection.openOutputStream();
outputStream.write(data);
outputStream.close();
}
public void pauseApp(){}
public void destroyApp(boolean unconditional){}
public void commandAction(Command c, Displayable s){
if(c==exit){
destroyApp(false);
notifyDestroyed();
}
else if (c==clear){
strTxtField=txtField.getString();// store "that all folks"
System.out.println(strTxtField);
}//end of c0mmand=clear
} // end of commandAction
public void commandAction(Command c, Item item){
}//emd of commandAction method
private class MyStateListener implements ItemStateListener
{
boolean pictureIsShown=false; //Remember the state
int pictureIndex; //Remember the index
public void itemStateChanged(Item item)
{
if(item==sImage){
sIndex=sImage.getSelectedIndex();
switch(sIndex){
case 0:System.out.println(sIndex);
if (!pictureIsShown){
form.delete(pictureIndex);}
break; // end of case0
case 1:System.out.println(sIndex);
if (!pictureIsShown){
try{
ImageItem logo= new ImageItem("",Image.createImage ("/misa.jpg"),ImageItem.LAYOUT_CENTER,"");
pictureIndex=form.append(logo);
System.out.println("success");
}
catch(IOException e)
{System.out.println("error");}}//end of if
break;
default: System.out.println("kiss my ass");
}//end of switch
}//end of if
//do something
}
}
}
thanks in advance
Firstly there is nothing like simple or complex errors. Even simple errors sometimes seems to be more complex.
Enable FileConnection i.e. JSR 75 in toolkit before you compile your code. since, compiler is unable to find FileConnection class in the classpath.
We all have gone thro' these phases before. Kindly do not ask for forgiveness in the forum.
~Mohan
