dictionary

[JosAH]

can explain it more to me, i didint understand it very well ur method
what are sets? are they like arrays or what?

The API documentation for the Set interface is your friend.

kind regards,

Jos

[user0]

can explain it more to me, i didn't understand it very well ur method
what are sets? are they like arrays or what?

Sets are a type of interface in java. When you store elements in a set, the set interface ensures there is no duplicate element in the set. Before proceeding with your implementation, read the Java API as JosaH mentioned:

Set (Java 2 Platform SE v1.4.2)

[aizen92]

ok
i read them but i still dont know how to use them?

[JosAH]

ok
i read them but i still dont know how to use them?

Read it again? It isn't rocket science; if you give up after a first read I can tell you that the software development business is not for you.

kind regards,

Jos

[aizen92]

Sorry for asking too much, but is there an alternate for sets?
something with similar functionality but different than sets, i dont think im getting the hang of it

[JosAH]

Sorry for asking too much, but is there an alternate for sets?
something with similar functionality but different than sets, i dont think im getting the hang of it

If there is something with a similar functionality you'd experience the same difficulties and you wouldn't understand it either. Sets are easy actually:

Set<String> words= new HashSet<String>(); // create a new set

words.add("foo"); // add a few words to the set
words.add("bar");
words.add("baz");
words.add("foo"); // this won't be added because it's already in the set

for (String s: words) // print the entire set
   System.out.println(s);

You should be able to handle it from here.

kind regards,

Jos

[aizen92]

Well i got it to work with the previous skeleton code u gave me the one with the same array but with 3 for loops and checking, and it worked, now im going to work on having a scanner read from a file and inputing them in an array
and hope it works

@Jos: i really tried the set but i couldn't because it was kinda hard to understand, sorry but really thnx for heping me alot

and also thnx for user0 for helping me too with this problem, anyway ill post my final code when it works

[JosAH]

@Jos: i really tried the set but i couldn't because it was kinda hard to understand, sorry but really thnx for heping me alot

and also thnx for user0 for helping me too with this problem, anyway ill post my final code when it works

Good; you show your code and I'll show you the code using Sets; you compare both versions and see for yourself.

kind regards,

Jos

[JavaHater]

Ok, i think ill be testing a little bit before heading to the whole array thingy from input, im gonna assume i already made the arrays and had them arranged, and made 2 arrays sub and word with each one's element in them, and i want to see how to test for if to count for the word or not.
this is the code ive come up with

public class testing
{
    public static void main (String[] args)
    {
        String [] sub = {"bag", "sun", "day", "moon"};
        String [] word = {"Sunday", "Monday", "airbag", "Moonbag"};
        
        int count = 0;
        
        for ( int i = 0; i < word.length; i++)
        {
            for ( int j = 0; j < sub.length; j++)
            {
                for ( int k = 0; k < sub.length; k++)
                {
                    if ( word[i].equals(sub[j] + sub[k]))
                    {
                        count++;
                    }
                }
            }
        }
        
        System.out.println(count);
    }
}

but the problem is my output is "0", so i think there is something wrong with my code
any help with this
thanks in advance

you should compare them case-insensitive

public class testing
{
    public static void main (String[] args)
    {
        String [] sub = {"bag", "sun", "day", "moon"};
        String [] word = {"Sunday", "Monday", "airbag", "Moonbag"};
        int count = 0;
        for ( int i = 0; i < word.length; i++)
        {
            for ( int j = 0; j < sub.length; j++)
            {
                for ( int k = 0; k < sub.length; k++)
                {
                    if ( word[i].toLowerCase().equals(  (sub[j] + sub[k]).toLowerCase()  ) )
                    {
                        count++;
                    }
                }
            }
        }

        System.out.println(count);
    }
}

[aizen92]

the problem said to ignore case sensitivity, so it doesnt matter if theyre upper or lower case

But the thing is, i got my code work half of it, but im having a problem here, here is my code

import java.util.*;
import java.io.*;
import java.util.Arrays;

public class Problem2
{
    public static void main (String[] args) throws FileNotFoundException
    {
        Scanner input = new Scanner (new File (args[0])); // this scanner to see how many words in each dictionary
        Scanner input2 = new Scanner (new File (args[0])); // this scanner is to read from input and use them in arrays
        int count = 0; // a count for words that can be divided into 2 sub-words
        int wordC = 0; // a count for how many words in the first dictionary
        int wordC2 = 0; // a count for how many words in the second dictionary

        while ( input.hasNextLine()) // to count for the first dictionary
        {
            if ( input.next().contains("-"))
            {
                break;
            }else{
                input.nextLine();
                wordC++;
            }
        }
        
        while ( input.hasNextLine()) // to count for the second dictionary
        {
            if ( input.next().contains("+")) 
            {
                break;
            }else{
                input.nextLine();
                wordC2++;
            }
        }
        
        String [] words = new String [wordC]; // an array that contains all the words in a dictionary that is used for comparison later
        
        while ( input2.hasNextLine() && !input2.next().contains("-")) // i believe the error is here, because im trying to put the words of the first dictionary in the array, and when it reaches something the contains - to stop and continue to the other statements ( that will later be written )
        {
             for ( int i = 0; i < words.length - 1; i++)
             {
                words [i] = input2.next();
                input2.nextLine();
             }
        }
        
        System.out.println(Arrays.toString(words)); // to print the array to check if my work is right or wrong
    }
}

i am aiming to get

[bag, sun, day, moon, Sunday, Monday, airbag, Moonbag]

but what im getting is

[sun, day, moon, Sunday, Monday, airbag, Moonbag, null]

what could be the problem with my code?

[JavaHater]

the problem said to ignore case sensitivity, so it doesnt matter if theyre upper or lower case

Correct, it doesn't matter, that's why when you do equals() , you must convert them to either uppercase or lowercase for comparison. If you don't, then "Bag" will not be equal to "bag", right?

But the thing is, i got my code work half of it, but im having a problem here, here is my code

you should show what you files look like.

[aizen92]

Correct, it doesn't matter, that's why when you do equals() , you must convert them to either uppercase or lowercase for comparison. If you don't, then "Bag" will not be equal to "bag", right?

yeh, and i got this working by this code in which i assumed i have an array and did the checking

import java.util.*;
import java.io.*;

public class testing
{
    public static void main (String[] args)
    {
        String [] a = {"straw", "black", "blue", "berry", "raspberry", "strawberry", "blueberry", "blackberry", "cranberry", "Halleberry"};
        
        int count = 0;
        
        for ( int i = 0; i < a.length; i++)
        {
            for ( int j = 0; j < a.length; j++)
            {
                for ( int k = 0; k < a.length; k++)
                {
                    if ( a[i].toLowerCase().equals(a[j].toLowerCase() + a[k].toLowerCase()))
                    {
                        count++;
                    }
                }
            }
        }
        
        System.out.println(count);
    }
}

but now im trying to get the input from the file and putting them in an array to do the above code

my input file is the following

bag
sun
day
moon
Sunday
Monday
airbag
Moonbag
----
straw
black
blue
berry
raspberry
strawberry
blueberry
blackberry
cranberry
Halleberry
+++

[JosAH]

                    if ( a[i].toLowerCase().equals(a[j].toLowerCase() + a[k].toLowerCase()))

Don't use the toLowerCase() method, use the equalsIgnoreCase( ... ) method instead (it saves you the creation of a couple of String objects). Your problem is that your file contains all the words, compound words as well as the 'elementary' words. You have to check each word if it is the catenation of two other words in the same file/array. Have a look at my code suggestion again and read my explanation about those Sets again.

kind regards,

Jos

[aizen92]

ok, i got the equalsIgnoreCase
now whats left is why my code is only reading from the second words and leaving the one null

i used this

String [] words = new String [wordC + wordC2 + 2];
        
        while ( input2.hasNextLine() && !input2.next().contains("-"))
        {
             for ( int i = 0; i < wordC + wordC2 + 1; i++)
             {
                words [i] = input2.next();
             }
        }

where wordC + wordC2 + 2 is the number of all the words in the input inlcuding the ---- and +++, but still all i get is missingn the first one

[JosAH]

where wordC + wordC2 + 2 is the number of all the words in the input inlcuding the ---- and +++, but still all i get is missingn the first one

What are those '-----' and '+++++' lines doing in that file? I thought you had just a file with words (one word per line)? b.t.w. you're reading the first word and ignore it in the header of your while loop (you're testing it for '-----' and forget about it afterwards.

kind regards,

Jos

[aizen92]

the "----" and "+++" are just there to as endings to each dictionary

how do u suggest to solve the problem of

you're reading the first word and ignore it in the header of your while loop (you're testing it for '-----' and forget about it afterwards

[JavaHater]

you can try Scanner

            Scanner sc = new Scanner( new File("inputfile") );
            sc.useDelimiter("\\Z");
            String[] data = sc.next().split("\\n"); // data will now contain your strings

[aizen92]

ok, ive got all my code, and my final one, but i have a problem here, all my input is 0 and 0 for both counts, heres my code

import java.util.*;
import java.io.*;
import java.util.Arrays;

public class Problem2
{
    public static void main (String[] args) throws FileNotFoundException
    {
        Scanner input = new Scanner (new File (args[0]));
        Scanner input2 = new Scanner (new File (args[0]));
        int count = 0;
        int count2 = 0;
        int wordC = 0;
        int wordC2 = 0;

        while ( input.hasNextLine())
        {
            if ( input.next().contains("-"))
            {
                break;
            }else{
                input.nextLine();
                wordC++;
            }
        }
        
        while ( input.hasNextLine())
        {
            if ( input.next().contains("+")) 
            {
                break;
            }else{
                input.nextLine();
                wordC2++;
            }
        }
        
        String [] words = new String [wordC];
        String [] words2 = new String [wordC2];
        
        for ( int i = 0; i < wordC; i++)
        {
            input2.useDelimiter("\n");
            words[i] = input2.next();
        }
        input2.next();
        for ( int i = 0; i < wordC2; i++)
        {
            words2[i] = input2.next();
        }
        
        for ( int i = 0; i < words.length; i++)
        {
            for ( int j = 0; j < words.length; j++)
            {
                for ( int k = 0; k < words.length; k++)
                {
                    if ( words[i].equalsIgnoreCase(words[j] + words[k]))
                    {
                        count++;
                    }
                }
            }
        }
        
        for ( int i = 0; i < words2.length; i++)
        {
            for ( int j = 0; j < words2.length; j++)
            {
                for ( int k = 0; k < words2.length; k++)
                {
                    if ( words2[i].equalsIgnoreCase(words2[j] + words2[k]))
                    {
                        count2++;
                    }
                }
            }
        }
        
        System.out.println(count);
        System.out.println(count2);
    }
}

i tried the checking method ( last 2 for loops) using an array created by me and entered the elements manually by me, and it worked, and gave me the correct numbers, but in this code it isnt working

[JosAH]

i tried the checking method ( last 2 for loops) using an array created by me and entered the elements manually by me, and it worked, and gave me the correct numbers, but in this code it isnt working

So something's different when you specify those two arrays yourself and when you try to read them from a file. Print the content of both arrays:

System.out.println(Arrays.toString(yourArray));

... and see if you've read them correctly. This is elementary debugging and you should learn to do that.

kind regards,

Jos

[aizen92]

I printed the arrays and checked them and they were correct
I double checked them more than once and they were correct