Java array that creates secuential lincs with <a href>

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Code that creates files with the file name as array contents, the file has word with lincs previous for the word before and next for the word after, at present it creates files but !does iterate the array just prints array content as the position specified by array, it should iterate array write array coontent as word a previous linc with previous array content and neyt linc with neyt array content

is it possible to insert images here would want to insert image and show how the output loocs

public class WrHtmlWithLincs 
   {
    public static void main(String args[]) throws IOException 
    { 
    BufferedWriter bw = null;
    FileWriter fw = null;         

    try
    {   
        String word[];       
        word = new String[11];                                              
        word[0] = "Software";                                                          
        word[1] = "Java";                                                   
        word[2] = "Android";                                                
        word[3] = "Code";                                                   
        word[4] = "Computer Science";                                                 
        word[5] = "Satellite Navigation";                                        
        word[6] = "Communications";    
        word[7] = "Hongyan"; 
        word[8] = "Calculator";                                             
        word[9] = "JavaScript";                                             
        word[10] = "Stanford";             

        for (int y = 0; y < word.length; y++)
        {            
        try
        {
        fw = new FileWriter("F:\\" + Ad + ".html");            
        bw = new BufferedWriter(fw);
        bw.write("<Table align='center' border='4' color = 'cyan'>");    

        bw.write("<TR>"); 

        bw.write("<TD>"); 
        bw.write("<a href=" + word[y] + ".html>");                                 
        bw.write("Previous"); 
        bw.write("</a>");  
        bw.write("</TD>"); 

        bw.write("<TD>"); 
        bw.write(word[y]); 
        bw.write("</TD>");          

        bw.write("<TD>"); 
        bw.write("<a href=" + word[y] + ".html>");                                 
        bw.write("Next"); 
        bw.write("</a>");
        bw.write("</TD>");             

        bw.write("</TR>");            
        bw.write("<Table>");                        
        }
        catch(IOException d)
        {
        d.printStackTrace();
        }
        finally
        {
        try {
            if (bw != null)
                bw.close();

            if (fw != null)
                fw.close();
        } catch (IOException d) {
            d.printStackTrace();
        }

        }          

        }   
    }                    
    catch(Exception d)
    {
        d.printStackTrace();
    }
    finally
    {
        try {
            if (bw != null)
                bw.close();

            if (fw != null)
                fw.close();
        } catch (IOException d) {
            d.printStackTrace();
        }

    }
}
}

changed the code now but the error is :

java.lang.NullPointerException
	at java.io.Writer.write(Writer.java:157)
	at html.WrHtmlWithLincs.main(WrHtmlWithLincs.java:50)

What I have tried:

array iteration with for and code refraction

Posted 21-Aug-18 7:43am

solar os

Updated 27-Aug-18 5:43am

v3

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Richard MacCutchan · Answer 1 · 2018-08-25T22:52:00

Solution 2

You now have a 14 word array that only contains 11 elements, so as soon as y equals 12 your program will crash. And you are also using the exact same reference for the Previous, current and Next items.

Try and think about exactly what you want in each field. If the current item is the first in the list then there is no Previous entry. And if the current item is the last in the list then there is no Next entry.

Posted 25-Aug-18 22:52pm

Richard MacCutchan

Comments

solar os 27-Aug-18 11:45am

thats cool, now the program runs but it still does not iterates the array as it should Previous and Next does not move the pages forward and backwards as the array contents are ty

Richard MacCutchan 27-Aug-18 12:32pm

No idea what that means. All your program does is to write some HTML to a file. What were you expecting to happen?

solar os 28-Aug-18 8:00am

the program should write html with a word surrounded by previous and neyt lincs, the lincs are array contents which means that each array content has a corresponding named html document. Button Click event for next button is that it takes you to next page so if you are on ComputerScience.html it would take you to SatelliteNavigation.html and if you click on previous button that would take you to Code.html ty

Richard MacCutchan 28-Aug-18 8:08am

Yes, and I have already explained what your code needs to do in order to write this information. Using the example above where variable y is the index to the current item. The previous item should be referred to as word[y-1]. However, if y equals zero, then there is no previous item, so it should not be written. Similarly there is no next item if y equals word.length - 1, i.e. this is the last item in the list.

solar os 30-Aug-18 11:35am

did write word[y], word[y+1], word[y+2] but got the error "java.lang.ArrayIndexOutOfBoundsException: 11 at html.WrHtmlWithLincs.main(WrHtmlWithLincs.java:55)"

Richard MacCutchan 30-Aug-18 12:30pm

Why did you do that, after I explained what you need to do? Especially the part about not trying to put a previous entry before the first one, and a next entry after the last.

Richard MacCutchan · Answer 2 · 2018-08-21T22:20:00

Solution 1

Java

        bw.write("<a href=" + word[0] + ".html>");  

...
        bw.write(word[1]); 

...
                               
        bw.write("<a href=" + word[2] + ".html>");

You are writing the same data in every file.

If you are trying to add backward and forward links, then you need to use a simple indexed for loop. You also need to add dummy elements after the last item and before the first one, in order that your forward and backward links do not cause an exception for the last and first items.

Posted 21-Aug-18 22:20pm

Richard MacCutchan

Updated 22-Aug-18 3:26am

v3

Comments

solar os 27-Aug-18 11:54am

shouldnt u use variable instead of numbers !word[0] !word[1] !word[2] but word[y] word[y + 1] word[y + 2]

Richard MacCutchan 27-Aug-18 12:34pm

Of course. That was what I was trying to explain to you.

solar os 30-Aug-18 12:11pm

is there a site where you could get technical consultant for stoc options as shareholder what that would do is serve few purposes which are hasten the product development and more reliable robust software ty

solar os 30-Aug-18 12:11pm

is there a site where you could get technical consultant for stoc options as shareholder what that would do is serve few purposes which are hasten the product development and more reliable robust software collaborative workforce is way forward ty

Richard MacCutchan 30-Aug-18 12:31pm

You need to have a product and a business plan first. And I'm sorry to say that you are a long way short of that at the moment.

solar os 31-Aug-18 12:28pm

lol you are funny you

Richard MacCutchan 31-Aug-18 12:46pm

Well if you believe that your product is ready to be of interest to investors, then all I can say is good luck to you, and I hope you succeed.

solar os 1-Sep-18 12:40pm

ty what do you do are you a professional programmer , if i tell you the plan would that interest you, what you would do is make the software more reliable and robust, at present myself it takes lot of time and effort, must conceptualise, design, code and launch sw myself. Lot of projects if you r interested as shareholder. the present project is huge web based language learning and improvement solution. The site would have about hundred and fifty thousand pages

Richard MacCutchan 1-Sep-18 13:46pm

lol

solar os 15-Sep-18 11:58am

its a good job the online matrimonial market is worth several millions if not more, if you have few good developers then its worth it