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Weird behavior with GET and substring

So I made this piece of code:
options = getURL("http://florens.be/EnterRoomAlert/options.txt");
soundOptionStartPos = options.indexOf("sound") + 6;
soundOptionEndPos = options.indexOf("e", soundOptionStartPos) + 1;
soundOptionResult = options.substring(soundOptionStartPos, soundOptionEndPos);
And this is the getURL method:
public static String getURL(String urlToRead) throws Exception {
StringBuilder result = new StringBuilder();
URL url = new URL(urlToRead);
HttpURLConnection conn = (HttpURLConnection) url.openConnection();
conn.setRequestMethod("GET");
BufferedReader rd = new BufferedReader(new InputStreamReader(conn.getInputStream()));
String line;
while ((line = rd.readLine()) != null) {
result.append(line);
}
rd.close();
return result.toString();
}
This is the content off the file options.txt:
sound=false
mail=false
database=false
Everytime I run this code and print out soundOptionResult I get true.

My Java code always give false value but my API got it true?

I have problem with my code.
Here is a pic
The result is always false.
but in my API
both results are true.
Here part of my Java code. Any help?
public class Main {
public static void main(String[] args) throws IOException {
BufferedReader br = new BufferedReader(new FileReader("in.txt"));
PrintWriter out = new PrintWriter(new FileWriter("result.txt"), true);
String User;
while ((User = br.readLine()) != null){
URL url = new URL("http://mysecretweb.com/r/migrate.php?name="+User);
URLConnection connection = url.openConnection();
BufferedReader reader = new BufferedReader(new InputStreamReader(connection.getInputStream()));
boolean result = Boolean.valueOf(reader.readLine());
String str = Boolean.toString(result);
System.out.println(User+" is "+str);
out.write(User+" is "+str);
out.write("\r\n");
}
}
}

Dump the raw result of the call with java. Boolean.valueOf( value ) is true only if the first line you are reading is parseable as "true"
If the line contains other characters like web headers or is an html page or the content has spaces... it can't be parseable.
Example of code (realy simple and bogus,but functional) to dump result and text how many lines have. and if it has spaces.
public class StackTest {
public static void main(String[] args) throws IOException {
String userToTest="something";
URL url = new URL("http://mysecretweb.com/r/migrate.php?name=" + userToTest);
URLConnection connection = url.openConnection();
BufferedReader reader = new BufferedReader(new InputStreamReader(connection.getInputStream()));
String line = null;
do{
line = reader.readLine();
System.out.print("|");
System.out.print(line);
System.out.println("|");
}while(line!=null);
reader.close();
}
}

You can use InputStreamReader reader=new InputStreamReader(connection.getInputStream()); instead of BufferedReader reader = new BufferedReader(new InputStreamReader ( connection.getInputStream())), then you will get your desird output.
public class Main {
public static void main(String[] args) throws IOException {
BufferedReader br = new BufferedReader(new FileReader("in.txt"));
PrintWriter out = new PrintWriter(new FileWriter("result.txt"), true);
String user;
while ((user = br.readLine()) != null){
URL url = new URL("http://gagqga.gq/r/migrate.php?name="+user);
URLConnection connection = url.openConnection();
// BufferedReader reader = new BufferedReader(new InputStreamReader(connection.getInputStream()));
InputStreamReader reader=new InputStreamReader(connection.getInputStream());
boolean result = Boolean.valueOf(reader.ready());
String str = Boolean.toString(result);
System.out.println(user+" is "+str);
out.write(user+" is "+str);
out.write("\r\n");
}
}
}

How to create item objects from reading a text file?

I'm trying to read data from a text file and create Item Objects with it.
Item Objects have fields String title, String formatt, boolean onLoan, String loanedTo and String dateLoaned. In my save()method, I print every object to a text file in a new line and the fields are seperated by "$" (dollar sign). How can I read the text file line by line and create a new object from each line and add it to an array.
TextFile Example:
StarWars$DVD$false$null$null
Aliens$Bluray$true$John$Monday
public void save() {
String[] array2 = listForSave();
PrintWriter printer = null;
try {
printer = new PrintWriter(file);
for (String o : array2) {
printer.println(o);
}
printer.close();
} catch ( IOException e ) {
e.printStackTrace();
}
}
public void open(){
try{
FileReader fileReader = new FileReader(file);
BufferedReader bufferedReader = new BufferedReader(fileReader);
StringBuffer stringBuffer = new StringBuffer();
String line;
while ((line = bufferedReader.readLine()) != null) {
stringBuffer.append(line);
stringBuffer.append("\n");
}
fileReader.close();
System.out.println("Contents of file:");
System.out.println(stringBuffer.toString());
}catch ( IOException e ) {
e.printStackTrace();
}
}
Thanks everyone. Here's my final code:
public void open(){
try{
FileReader fileReader = new FileReader(file);
BufferedReader bufferedReader = new BufferedReader(fileReader);
String line;
String[] strings;
while ((line = bufferedReader.readLine()) != null) {
strings = line.split("\\$");
String title = strings[0];
String format = strings[1];
boolean onLoan = Boolean.parseBoolean(strings[2]);
String loanedTo = strings[3];
String dateLoaned = strings[4];
MediaItem superItem = new MediaItem(title,format, onLoan,loanedTo,dateLoaned);
items.add(superItem);
}
fileReader.close();
}catch ( IOException e ) {
e.printStackTrace();
}
}

String line = // input line e.g. "Aliens$Bluray$true$John$Monday"
String[] strings = line.split("\\$"); // use regex matching "$" to split
String title = strings[0];
String formatt = strings[1];
boolean onLoan = Boolean.parseBoolean(strings[2]);
String loanedTo = strings[3];
String dateLoaned = strings[4];
// TODO: create object from those values
Maybe you need to handle null differently (in case you want the String "null" to be converted to null); note that you can't distinguish if null or "null" was saved.
This function converts "null" to null and returns the same string otherwise:
String convert(String s) {
return s.equals("null") ? null : s;
}
Reading the objects to an array
Since you don't know the number of elements before reading all lines, you have to work around that:
Write the number of objects in the file as first line, which would allow you to create the array before reading the first object. (Use Integer.parseInt(String) to convert the first line to int):
public void save() {
String[] array2 = listForSave();
PrintWriter printer = null;
try {
printer = new PrintWriter(file);
printer.println(array2.length);
for (String o : array2) {
printer.println(o);
}
printer.close();
} catch ( IOException e ) {
e.printStackTrace();
}
}
public void open(){
try{
FileReader fileReader = new FileReader(file);
BufferedReader bufferedReader = new BufferedReader(fileReader);
StringBuffer stringBuffer = new StringBuffer();
int arraySize = Integer.parseInt(stringBuffer.readLine());
Object[] array = new Object[arraySize];
int index = 0;
String line;
while ((line = bufferedReader.readLine()) != null) {
// split line and create Object (see above)
Object o = // ...
array[index++] = o;
}
//...
}catch ( IOException e ) {
e.printStackTrace();
}
//...
}
or
Use a Collection, e.g. ArrayList to store the objects and use List.toArray(T[]) to get an array.

quick and dirty solution might be...
public void open(){
try{
ArrayList<Item> list = new ArrayList<Item>(); //Array of your ItemObject
FileReader fileReader = new FileReader(file);
BufferedReader bufferedReader = new BufferedReader(fileReader);
StringBuffer stringBuffer = new StringBuffer();
String line;
while ((line = bufferedReader.readLine()) != null) {
Item itm = new Item(); //New Item Object
String [] splitLine = line.split("\\$");
item.title = splitLine[0];
item.format = splitLine[1];
item.onLoan = Boolean.parseBoolean(splitLine[2]);
item.loanedTo = splitLine[3];
item.dateLoaned = splitLine[4];
list.add(itm);
stringBuffer.append(line);
stringBuffer.append("\n");
}
fileReader.close();
System.out.println("Contents of file:");
System.out.println(stringBuffer.toString());
}catch ( IOException e ) {
e.printStackTrace();
}
}
But this is won't scale if you need to re-arrange or add new fields.

You could try this to "parse" every line of your file
String[] result = "StarWars$DVD$false$null$null".split("\\$");
for (int i=0; i<result.length; i++) {
String field = result[i]
... put the strings in your object ...
}

Read url content into a String

I am reading the contents of buffered reader in the below method:
public static String readBuffer(Reader reader, int limit) throws IOException
{
StringBuilder sb = new StringBuilder();
for (int i = 0; i < limit; i++) {
int c = reader.read();
if (c == -1) {
return ((sb.length() > 0) ? sb.toString() : null);
}
if (((char) c == '\n') || ((char) c == '\r')) {
break;
}
sb.append((char) c);
}
return sb.toString();
}
I am invoking this method later to test -
URL url = new URL("http://www.oracle.com/");
BufferedReader in = new BufferedReader(new InputStreamReader(url.openStream()));
StringBuffer sb = new StringBuffer();
String line=null;
while((line=readBuffer(in, 2048))!=null) {
sb.append(line);
}
System.out.println(sb.toString());
My question here is, I am returning the contents of bufferedreader into a string in my first method, and appending these String contents into a StringBuffer again in the second method, and reading out of it. Is this the right way? Any other way I can read the String contents that has contents from url?Please advise.

I hope this works -
public static String readFromURL(){
URL url = new URL("http://www.oracle.com/");
StringBuilder responseBuilder = new StringBuilder();
HttpURLConnection httpCon = (HttpURLConnection) url.openConnection();
httpCon.setDoOutput(true);
httpCon.setDoInput(true);
int resCode = httpCon.getResponseCode();
InputStream is = null;
if (resCode == 200) {
is = httpCon.getInputStream();
BufferedReader reader = new BufferedReader(
new InputStreamReader(is));
String response = null;
while (true) {
response = reader.readLine();
if (response == null)
break;
responseBuilder.append(response);
}
}
return responseBuilder.toString();
}

very long string as a response of web service

I am getting a really long string as the response of the web service I am collecting it in the using the StringBuilder but I am unable to obtain the full value I also used StringBuffer but had no success.
Here is the code I am using:
private static String read(InputStream in ) throws IOException {
//StringBuilder sb = new StringBuilder(1000);
StringBuffer sb = new StringBuffer();
String s = "";
BufferedReader r = new BufferedReader(new InputStreamReader( in ), 1000);
for (String line = r.readLine(); line != null; line = r.readLine()) {
sb.append(line);
s += line;
} in .close();
System.out.println("Response from Input Stream Reader >>>" + sb.toString());
System.out.println("Response from Input S >>>>>>>>>>>>" + s);
return sb.toString();
}
Any help is appreciated.

You can also split the string in array of strings in order to see all of them
String delimiter = "put a delimiter here e.g.: \n";
String[] datas=sb.toString().split(delimiter);
for(String string datas){
System.out.println("Response from Input S >>>>>>>>>>>>" + string);
}

The String may not print entirely to the console, but it is actually there. Save it to a file in order to see it.

I do not think that your input is too big for a String, but only not shown to the console because it doesn't accept too long lines. Anyways, here is the solution for a really huge input as characters:
private static String[] readHugeStream(InputStream in) throws IOException {
LinkedList<String> dataList = new LinkedList<>();
boolean finished = false;
//
BufferedReader r = new BufferedReader(new InputStreamReader(in), 0xFFFFFF);
String line = r.readLine();
while (!finished) {
int lengthRead = 0;
StringBuilder sb = new StringBuilder();
while (!finished) {
line = r.readLine();
if (line == null) {
finished = true;
} else {
lengthRead += line.length();
if (lengthRead == Integer.MAX_VALUE) {
break;
}
sb.append(line);
}
}
if (sb.length() != 0) {
dataList.add(sb.toString());
}
}
in.close();
String[] data = dataList.toArray(new String[]{});
///
return data;
}
public static void main(String[] args) {
try {
String[] data = readHugeStream(new FileInputStream("<big file>"));
} catch (IOException ex) {
Logger.getLogger(StackoverflowStringLong.class.getName()).log(Level.SEVERE, null, ex);
} catch (OutOfMemoryError ex) {
System.out.println("out of memory...");
}
}

System.out.println() does not print all the characters , it can display only limited number of characters in console. You can create a file in SD card and copy the string there as a text document to check your exact response.
try
{
File root = new File(Environment.getExternalStorageDirectory(), "Responsefromserver");
if (!root.exists())
{
root.mkdirs();
}
File gpxfile = new File(root, "response.txt");
FileWriter writer = new FileWriter(gpxfile);
writer.append(totalResponse);
writer.flush();
writer.close();
}
catch(IOException e)
{
System.out.println("Error:::::::::::::"+e.getMessage());
throw e;
}