🚀 go-pugleaf

The reason you can't use == or != on strings is that they're not
primitive types - if you do use == you'll find yourself comparing the
reference that leads to the string, not what's contained within it.

It's like comparing pointers to an object in C or C++.

Of course, if anyone wants to correct me, feel free, I've only been
doing Java for a couple of months.

Danny Smith

Everyone who favors abortion has already been born. 

On 02 Apr 2000 19:38:46 +1000, Tim Cross <tcross@tim.northnet.com.au>
wrote:

>Greg,
>
>I think your problem is you need to use the equals() method fo the
>string class - you cannot compare strings with == or !=. Try something 
>like
>
>while (!(temp = in.readLine()).equals("")) // while line is not ""
>
>Note that you may have another problem here - what happens when you
>come to the end of the input file? Perhapse you could try something
>like
>
>while ((temp = in.readLine()) != null) {
>        if (temp.equals(""))
>                // do whatever you do if you get a blank line
>        else
>                // do whatever you do when you don't get a blank line
>}
>
>Hope this helps
>
>Tim
>"Greg" <gsimon@bigpond.net.au> writes:
>
>> I have to read in a paragraph of text from a text file like the one shown
>> below only the program has to stop reading on the blank line.
>> 
>> ================================
>> blah blah blah
>> hello hello
>> 
>> start of new paragraph
>> ================================
>> 
>> this is what I have tried:
>> 
>> BufferedReader in = new BufferedReader(
>>                                        new FileReader("file.txt"));
>> String temp;
>> 
>> while((temp = in.readLine()) != "\n")   /* I have also tried ...!= "" */
>> {
>>    ......
>> 
>> could someone please tell me what to compare the String to, or where I am
>> going wrong. any help appreciated.
>> 
>> Greg
>> 
>> 
>
>-- 
>Tim Cross
>NorthNet Internet Services
>mailto:tcross@northnet.com.au
>phone:+61 2 6772 5973