Getting HTML by URL

Question

I was trying to get some HTML by URL and put it into String. This is my effort:

public class 

    Bank {
        public static void main(String[] args) throws IOException {
            URL hh = new URL("https://m.hh.ru/");
            BufferedReader in = new BufferedReader(
                    new InputStreamReader(hh.openStream()));

            String inputLine;
            while ((inputLine = in.readLine()) != null) {

                inputLine.concat(inputLine);//returns null. WTF?
                System.out.println(inputLine);

            }
            in.close();
            System.out.println(inputLine);
        }
        }

As I said I want to put it to inputLine, but it returns NULL. What's wrong?

In Java Strings are immutable. Use StringBuilder instead. — PM 77-1
– PM 77-1, Commented Aug 24, 2013 at 16:42
There are several problems in this method. Better think it through again. One tip: the last call to in.readLine will set inputLine to null. — Henry
– Henry, Commented Aug 24, 2013 at 16:45

user000001 · Accepted Answer · 2013-08-24 16:47:30Z

3

Use a StringBuilder for string concatenation. The loop should look like this:

String inputLine;
StringBuilder sb = new StringBuilder();
while ((inputLine = in.readLine()) != null) {
    sb.append(inputLine).append("\n");
}
System.out.println(sb);

answered Aug 24, 2013 at 16:47

user000001

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