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How to Calculate the Keyword Count in a Particular page in java. I want to Know the ALgo for that.
Boyer-Moore String Search Algo
If you want to talk about algorithm the string search algorithm famous is Boyer-Moore String search algorithm.
A Java based implementation of Boyer-Moore can be found at http://algs4.cs.princeton.edu/53substring/BoyerMoore.java.html
KMP Algorithm
Another algorithm which can search with substring too is Knuth-Morris-Pratt(KMP) algorithm.
A Java based implementation of KMP can be found at
http://tekmarathon.wordpress.com/2013/05/14/algorithm-to-find-substring-in-a-string-kmp-algorithm/
Load the HTML into a String and you're good to go. Answer to you next question is right here.
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I have a java string in JSON format (the conventional key:value) which I get from Amazon S3. Some of the keys have regular expression pattern defined. What is the best way to get these keys and then fetch the values corresponding to them?
I know there exists regex of javautil which I'm planning to use. Is there any other better way for accessing the regex type keys?
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How to understand the implementation of algorithm behind Arrays.sort(int[]).
The sort function inside Arrays class - the logic is decided based on
paramArrayOfInt>7
paramArrayOfInt > 40
Why these specific breakpoint where paramArrayOfInt is the int array variable.
The sorting algorithm for Arrays.sort(int[] a) is a tuned quicksort.
Ref: https://docs.oracle.com/javase/6/docs/api/java/util/Arrays.html#sort(int[])
Read this article: http://citeseerx.ist.psu.edu/viewdoc/download?doi=10.1.1.14.8162&rep=rep1&type=pdf for understanding the Quick-sort used in Array.sort() by JON L. BENTLEY & M. DOUGLAS McILROY
In Java 7 pivot dual quick-sort algorithm is used for Arrays.sort(int[] a) i.e. refer this: What's the difference of dual pivot quick sort and quick sort?
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it is possible to assign that big number in java? i need to make a calculation of 39 digits value. could any help? Thanks
Problem:
Consider the following composite number:
340282367237851113557325445936183246849
Write a Java method to find two numbers whose product is the above number.
I guess you need to check out the BigInteger of the java API. That might be able to store your results of those much big numbers. Read the documentation,
http://docs.oracle.com/javase/7/docs/api/java/math/BigInteger.html
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I want to display the first folder name from the path.
/mnt/sdcard/Videos/lk.jpeg, I want to display mnt string. in java
/mnt/sdcard/Videos/lk.jpeg--> **mnt**
You can split on / and use [1] element from result array.
You can either use regular expressions or you can use String.split(). Note that the split() result should be checked for live usage (e.g. if it has at least two elements).
String desired = "/mnt/sdcard/foo".split("/")[1];
String str = "/mnt/sdcard/Videos/lk.jpeg";
System.out.println(str.split("/")[1]);
Try this out. This is a poor question. But maybe the asker can be a newbie.
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I am self studying java, i am on while loops already, I have an exercise here regarding a palindrome. what's a palindrome? how will code it? any ideas? or pseudocode for it? I am really confused here
NOT a HOMEWORK
Since its not homework, it shouldn't matter how you implement it.
public static <ToStringable> boolean isPalindrome(ToStringable stringable) {
String text = stringable.toString();
return text.equals(new StringBuilder(text).reverse().toString());
}
A palindrome is a sequence that reads the same backwards as forwards, like "kayak" or 12321.
See here: http://en.wikipedia.org/wiki/Palindrome
EDIT: there are also lots of questions about palindromes on stackoverflow already. Browse through them and come back if you have more specific questions:
https://stackoverflow.com/questions/tagged/palindrome
Palindrome is a sequence such that reversing the sequence gives you the same sequence. E.g. MAM