Hi All,
I would like to read a text file called "words.txt"
words in that file are arranged in notepad line by line like this:
good
hello
bye
ok
Some one can help me how I can read them in J2ME line by line so that it is easy to manipulate them.
thanks
I have same question.
J2ME does not have BufferedReader.readLine(). I don't know is there good ways to read text line by line.
In my case, I wrote a mehod to readLine from an Reader :
String readLine(Reader r) throws Exception
{
int c = r.read();
if( c == -1 )
return null;
String s = "";
while(c!=-1 && c!= '\n' && c!= '\r')
{
s += (char) c;
c = r.read();
}
return s;
}
Something like this.
InputStream inputStreamTxt =null;
inputStreamTxt = this.getClass().getResourceAsStream("file.txt");
StringBuffer buf = new StringBuffer();
Vector lines = new Vector();
int c ;
while ((c = inputStreamTxt.read()) != -1)
{
char ch = (char)c;
if (ch == '\n')
{ lines.addElement(buf.toString());
buf.delete(0,buf.lenght);
}
else
buf.append(ch);
}
inputStreamTxt.close();
Thank you very much PeppeME.
Your code helped me so much.
But I have two problems,
The code reads perfectly the file and stores it in vector, but when I try to display the content of vector, it displays also some empty lines at the end.
I don't know why?
Other thing, When apply a sorting algorithms to sort the words in the vector it is refusing.
Can u help me to solve those problems.
Thank u
Hi, PeppeME.
I tried what u told me to remove empty lines.
This my code, it takes a text file of words.
for example:
bye
hi
gone
hood
good
ok
After it takes a very word and convert it into its corresponding numeric signature similar to one of mobile phone.
for example good will give 4663.
After it diplays a string of word and signature
for good it will diplay 4663,good
My problem is that when I dispay the whole text files, it comes like this:
293,bye
44,hi
4663,gone
4663,hood
4663,good
65,ok
, //empty lines
,//empty line
My problem is to remove the two empty lines at the end.
See my code:
import java.io.*;
import javax.microedition.midlet.*;
import javax.microedition.lcdui.*;
import javax.microedition.io.*;
import java.util.Vector;
import java.util.Enumeration;
public class ReadFile extends MIDlet {
private Vector dict;
public ReadFile()
{
dict = new Vector();
}
public void startApp() {
readfile();
}
public void destroyApp(boolean b) {}
public void pauseApp() {}
public Vector readfile()
{
try {
Class c = this.getClass();
InputStream is = c.getResourceAsStream("help.txt");
InputStreamReader isr = new InputStreamReader(is, "UTF-8");
StringBuffer buffer = new StringBuffer();
int ch;
while ((ch = isr.read()) != -1)
{
char th = (char)ch;
if (th == '\n')
{
dict.addElement(new WordSig(toNumeric(buffer.toString()),buffer.toString()));
//dict.addElement(buffer.toString());
buffer.delete(0,buffer.length());
}//end if
else if ( th != '\r' ) {
buffer.append(th);
}
}//end while
isr.close();
}
catch(UnsupportedEncodingException e){
System.err.println(e);
}
catch (IOException e)
{
System.err.println(e);
}
for (Enumeration e = dict.elements() ; e.hasMoreElements() ;)
{
System.out.println(e.nextElement());
}
return dict;
}//end method readfile
public static String toNumeric (String word) {
String lowerWord = word.toLowerCase();
StringBuffer result = new StringBuffer("");
for (int i = 0; i < lowerWord.length(); i++) {
char c = lowerWord.charAt(i);
if ("abc".indexOf(c) > -1) result.append("2");
else if ("def".indexOf(c) > -1) result.append("3");
else if ("ghi".indexOf(c) > -1) result.append("4");
else if ("jkl".indexOf(c) > -1) result.append("5");
else if ("mno".indexOf(c) > -1) result.append("6");
else if ("pqrs".indexOf(c) > -1) result.append("7");
else if ("tuv".indexOf(c) > -1) result.append("8");
else if ("wxyz".indexOf(c) > -1) result.append("9");
else if (" ".indexOf(c) > -1) result.append("9");
else result.append("?");
}
return result.toString();
}//end toNumeric method
}//end ReadFile class
class WordSig implements Comparable {
String word;
String sig;
public WordSig (String sig, String word) {
this.sig = sig;
this.word = word;
}
public String getSig () {
return this.sig;
}
public String getWord() {
return this.word;
}
public int compareTo (Object ws) {
return sig.compareTo(((WordSig) ws).getSig());
}
public boolean equals (Object ws) {
return sig.equals(((WordSig) ws).getSig());
}
public String toString () {
return sig + ", " + word;
}
}
Please PeppeMe, can u show me with codes. I tried but I don't arrive at the right solution Thank u.
Something like this.
InputStream inputStreamTxt =null;
inputStreamTxt = this.getClass().getResourceAsStream("file.txt");
StringBuffer buf = new StringBuffer();
Vector lines = new Vector();
int c ;
while ((c = inputStreamTxt.read()) != -1)
{
char ch = (char)c;
if (ch == '\n')
{ lines.addElement(buf.toString());
buf.delete(0,buf.lenght);
}
else
buf.append(ch);
}
inputStreamTxt.close();
Thank u PeppeME.
it works.
I have other two questions.
First I would like to input Strings from keyboard without using the J2ME interface(the one which looks like a mobile phone). I don't want to use that I want to use COMPUTER keyboard. how can i do this?
Secondly, I would like to write messages as u write SMS in mobile phone. I want to use J2ME Kyepad. my question is to know how i can use the J2ME keypad. I want to implement a predictive text system
Thank u
