Groups > comp.lang.java.programmer > #27579 > unrolled thread

comparison of two string

Started by	Navneet Mathpal <navneetmathpal93@gmail.com>
First post	2014-02-23 23:13 -0800
Last post	2014-02-24 19:24 -0500
Articles	5 — 5 participants

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  comparison of two string Navneet Mathpal <navneetmathpal93@gmail.com> - 2014-02-23 23:13 -0800
    Re: comparison of two string Roedy Green <see_website@mindprod.com.invalid> - 2014-02-23 23:16 -0800
    Re: comparison of two string Andreas Leitgeb <avl@auth.logic.tuwien.ac.at> - 2014-02-24 10:46 +0000
      Re: comparison of two string Eric Sosman <esosman@comcast-dot-net.invalid> - 2014-02-24 07:59 -0500
        Re: comparison of two string Arne Vajhøj <arne@vajhoej.dk> - 2014-02-24 19:24 -0500

#27579 — comparison of two string

From	Navneet Mathpal <navneetmathpal93@gmail.com>
Date	2014-02-23 23:13 -0800
Subject	comparison of two string
Message-ID	<43f5b47b-d5ef-46e4-b6cd-af228c1742df@googlegroups.com>

why equal is not comparing it although data is same ???



  for (int i=0;i<blen;i++)
                    {
                    	System.out.println("Best :"+best[i]);
                    	String bb=best[i];
                        for(int j=0;j<flen;j++)	
                    	{   
                    		String ff=found[j];
                    		System.out.println("Found "+found[j]);
                    		
                    		
                    		if(bb.equalsIgnoreCase(ff))
                    		{
                    			count=count+1;
                    			System.out.println("hello");
                    		  resfound.add(found[j]);
                    		}
                    		
                    	}




OUTPUT IS :

Best :17601089
Found 18769218
Found  17601089
Found  7240354
Found  18668662
Found  530777
Found  12538756
Found  15441407
Found  11669171
Found  12062082
Found  12626411
Best :  18668662
Found 18769218
Found  17601089
Found  7240354
Found  18668662
Found  530777
Found  12538756
Found  15441407
Found  11669171
Found  12062082
Found  12626411
Best : 9967149
Found 18769218
Found  17601089
Found  7240354
Found  18668662
Found  530777
Found  12538756
Found  15441407
Found  11669171
Found  12062082
Found  12626411

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#27580

From	Roedy Green <see_website@mindprod.com.invalid>
Date	2014-02-23 23:16 -0800
Message-ID	<kbslg91r8m1sd375t46t2oh08uifg9njg8@4ax.com>
In reply to	#27579

On Sun, 23 Feb 2014 23:13:08 -0800 (PST), Navneet Mathpal
<navneetmathpal93@gmail.com> wrote, quoted or indirectly quoted
someone who said :

>why equal is not comparing it although data is same ???

see http://mindprod.com/jgloss/string.html#COMPARISON
-- 
Roedy Green Canadian Mind Products http://mindprod.com
The future has already happened, it just isn’t evenly distributed.
~ William Gibson (born: 1948-03-17 age: 65)

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#27582

From	Andreas Leitgeb <avl@auth.logic.tuwien.ac.at>
Date	2014-02-24 10:46 +0000
Message-ID	<slrnlgm8od.g8j.avl@login.logic.tuwien.ac.at>
In reply to	#27579

Navneet Mathpal <navneetmathpal93@gmail.com> wrote:
> why equal is not comparing it although data is same ???

According to your output, some of the strings in the found array
have an extra whitespace in front.  solution: use String.trim()

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#27583

From	Eric Sosman <esosman@comcast-dot-net.invalid>
Date	2014-02-24 07:59 -0500
Message-ID	<leffnr$qqm$1@dont-email.me>
In reply to	#27582

On 2/24/2014 5:46 AM, Andreas Leitgeb wrote:
> Navneet Mathpal <navneetmathpal93@gmail.com> wrote:
>> why equal is not comparing it although data is same ???
>
> According to your output, some of the strings in the found array
> have an extra whitespace in front.  solution: use String.trim()

     A hint for the future: When you're printing string values
for debugging purposes, print something that will make their
endpoints visible even if there's leading or trailing space.
For example, instead of the original

	System.out.println("Best :"+best[i]);
	System.out.println("Found "+found[j]);

you could try something like

	System.out.println("Best: <" + best[i] + ">");
	System.out.println("Found <" + found[j] + ">");

so that the output

	Best: <17601089>
	Found < 17601089>

would reveal the discrepancy more clearly.

-- 
Eric Sosman
esosman@comcast-dot-net.invalid

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#27585

From	Arne Vajhøj <arne@vajhoej.dk>
Date	2014-02-24 19:24 -0500
Message-ID	<530be2cd$0$303$14726298@news.sunsite.dk>
In reply to	#27583

On 2/24/2014 7:59 AM, Eric Sosman wrote:
> On 2/24/2014 5:46 AM, Andreas Leitgeb wrote:
>> Navneet Mathpal <navneetmathpal93@gmail.com> wrote:
>>> why equal is not comparing it although data is same ???
>>
>> According to your output, some of the strings in the found array
>> have an extra whitespace in front.  solution: use String.trim()
>
>      A hint for the future: When you're printing string values
> for debugging purposes, print something that will make their
> endpoints visible even if there's leading or trailing space.
> For example, instead of the original
>
>      System.out.println("Best :"+best[i]);
>      System.out.println("Found "+found[j]);
>
> you could try something like
>
>      System.out.println("Best: <" + best[i] + ">");
>      System.out.println("Found <" + found[j] + ">");
>
> so that the output
>
>      Best: <17601089>
>      Found < 17601089>
>
> would reveal the discrepancy more clearly.

That is very good advice.

I would use || not <>, but that does not matter.

Arne

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comparison of two string

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