Retrieve a web page content in java

[New ID]

Hello,
I'm new here, I started in Java (well since the beginning of the year: d)
and I try to create a class that makes it

Fetches the number of results
It gets the URL of the first (or nth but to implement)
It connects to this URL
It retrieves information selected
Storage SQL

Is it possible to specify the limits of my InputStream? Because when I try to compile the code, it gives me a error. I think I have a trouble to retrieve a web page content. If you have already done this then please help me.

[NetworkeR]

Hello,
Try changing the way of reading the page, that is you can try the following code:

StringBuffer src = new StringBuffer();

URLConnection url = u.openConnection();
url.setUseCaches(false);
url.connect();

Scanner sc = new Scanner(url.getInputStream());
 
/ / While there are still lines and we have not finished collecting data
while(sc.hasNextLine()){
	src.append(sc.nextLine());
}

[Linux-Us]

Hello,
If you really want to read character by character, you can also do as before but with a buffer:

int b;
InputStream input = u.openStream();
StringBuffer s = new StringBuffer();
while ((b = input.read()) != -1){
	s.append((char) b);
} / * while * /
/ / EOF reached
input.close();

This should work better than what you are using in your code.

[cyber-noob]

Hello,
When you are trying to do this

while ((b = is.read()) != -1)
		s + =(char) b; / * while * /

You create a string of size 1 then 2 then 3 etc.. So you create a lot of objects in memory and it is expensive. Use StringBuilder instead (or if StringBuffer java <5). So, if this is what you want then you can use it in your code, but if this is not your need, then you have to think about an alternative.

[GlassFish]

Hello,
Besides AC costs even more expensive since you also creates a StringBuilder for each iteration, as this code:

s + =(char) b;

Is equivalent to the following code:

 s = new StringBuilder(s).append(b).function toString() {
    [native code]
}();

So you have two new objects (new StringBuilder () and toString ()).

[NetWorkInG]

Hello,
Indeed, the Scanner class (if you speak well of it) can play a stream more easily. But you can spend quite a StringBuffer is equally. When you get the int, you must know that this is int there and instead add it to the StringBuffer, he will just put it in another variable not? If you need more information on the same then you can visit the sun's official site and there you can find the documentation on this.