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Doegon
Doegon
Last Activity: Mar 28 '08, 01:05 PM
Joined: Feb 11 '08
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  • Doegon
    replied to Indexing an ArrayList
    in Java
    here is the code and below is the error report i hpoe it helps


    ArrayList<Worke r> badiri = new ArrayList<Worke r>(); //create a collection of the workers

    double sum = 0.0;

    while(inFile.ha sNext())
    {
    for(Worker worka : badiri){ //fills up the collection with worker objects
    badiri.add(new Worker(workerNa me,salaryRate)) ;
    ...
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  • Doegon
    replied to Indexing an ArrayList
    in Java
    i have imported the java.util.*; class and it seems like no effect is shown the erro is still there.
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  • Doegon
    replied to Indexing an ArrayList
    in Java
    Thanks a lot man,the get() method worked but i still get an error on sorting the ArrayList.
    i used the method call of
    Collections.sor t(variablename) ;
    it doesn't seem to recognize the function.
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  • Doegon
    started a topic Indexing an ArrayList
    in Java

    Indexing an ArrayList

    Hi guys how does one index an object with a collection in an ArrayList,the code i used reports an error."expected is an array and found is an array list" and the possible loss of precision error.this is the code

    while(inFile.ha sNext())
    {
    for(Worker worka : badiri){ //fills up the collection with worker objects
    badiri.add(new Worker(workerNa me,salaryRate)) ;
    } ...
    See more | Go to post

  • Doegon
    replied to How to compute Permutation of 4P3?
    in Java
    just so happens i did methods/functions which compute factorial,permu tation and combinations of numbers using recursion.i hope they help you since your problem is inline with them.
    here they are:


    <Code removed by MODERATOR. Please read our posting guidelines forr our policy on simply posting answers.>

    well good luck,i will try and figure out how to help you print the permutations.
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  • Doegon
    replied to Converting types
    in Java
    alternatively you could use a scanner object to read from the file and use the function of parseInt to convert from string to integer and use the value for calculations.
    i.e
    Scanner inFile = new Scanner(new FileReader("fil ename"));
    String x = inFile.next();
    int x2 = Integer.parseIn t(x);

    then int sqr = Math.pow(x2,2); //this is just an example of a calculation you can do after...
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  • Doegon
    replied to while loop
    in Java
    yeh you are write a loop can be used,if you know anithing about binary search or linear search try either of them and i reccomend binary search coz its effective and fast.
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  • Doegon
    replied to Powers of two
    in Java
    public int powerOfTwo(int number)
    {
    int base = 2;
    for(int i=0;i< Math.pow(base,I nteger.MAX_VALU E);i++)
    {
    int powerOf2 = Math.pow(base,i );
    }
    }

    my apologies for breaking the rules,it won't happen again.as you can see i did attempt but i can only come up with a function which i'm not sure it will give me the powers of two.

    I understand x is an arbitrary...
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  • Doegon
    started a topic Powers of two
    in Java

    Powers of two

    hey guys thanks for the vowel help it worked
    i got one other question here.
    here is the method/function signature
    public int powerOfTwo(int number)

    the function should return a number such that number - x is a power of two if number is already a power of two it should return 0.
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  • Doegon
    replied to vowels in a string
    in Java
    Thanks man i will try and see the results, i think i get exactly what you mean.keep it real...
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  • Doegon
    replied to vowels in a string
    in Java
    sorry for not giving you guys enough info,i'm trying to write a method/function so i don't know if one can write a method in another method,is there any class api that has the function of isVowel that chaarmann described may be it will be beter to call the method. thanks for the idea though
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  • Doegon
    started a topic integer pair search
    in Java

    integer pair search

    guys i'm to write an application program that gets a filename and number form the command line and print all possible pairs of numbers such that a<b< number and (a^2 +b^2 +1)/ab is an integer

    e.g number = 1000
    filename = integers.txt

    output is
    (1,2)
    (2,5)
    (5,13)
    (13,34)
    (34,89)
    ...
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  • Doegon
    started a topic vowels in a string
    in Java

    vowels in a string

    Hi
    i need help with writing a method that takes in a string of characters and counts the syllables in the string.
    the method should not count chacter 'e' if its the last character in the string and by definition a syllable is vowel or a pair of adjacent vowels(a,e,o,i, u),the adjacent vowels count as one.

    so my problem is identifying that the two adjacent characters are vowels.how can i tackle this?

    thank...
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  • Doegon
    replied to Random Number
    in Java
    yes there is,but you need to understand that after creating the random number generator object you should use its methods to get a random nuber and store it in a variable/identifier then print the variable.

    what you did is try to print the object so since random is an object it holds the address referencing the object so @9304b1 is the address of the object

    fing the random class API and you will get the methods,good...
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