java Programming Glossary: hashWhy do I need to override the equals and hashCode methods in Java? http://stackoverflow.com/questions/2265503/why-do-i-need-to-override-the-equals-and-hashcode-methods-in-java do I need to override the equals and hashCode methods in Java Recently I read through this Developer.. Works Document . The document is all about defining hashCode and equals effectively and correctly but I am not able to.. to implement these method efficiently java equals hashcode share improve this question It is not always necessary..
Overriding equals and hashCode in Java http://stackoverflow.com/questions/27581/overriding-equals-and-hashcode-in-java equals and hashCode in Java What issues pitfalls must be considered when overriding.. pitfalls must be considered when overriding equals and hashCode java override equals hashcode share improve this question.. when overriding equals and hashCode java override equals hashcode share improve this question The theory for the language..
Why does Java's hashCode() in String use 31 as a multiplier? http://stackoverflow.com/questions/299304/why-does-javas-hashcode-in-string-use-31-as-a-multiplier does Java's hashCode in String use 31 as a multiplier In Java the hash code.. hashCode in String use 31 as a multiplier In Java the hash code for a String object is computed as s 0 31^ n 1 s 1 31^.. So why not 29 or 37 or even 97 java string algorithm hash share improve this question According to Joshua Bloch's Effective..
Switch Statement with Strings in Java http://stackoverflow.com/questions/338206/switch-statement-with-strings-in-java original switch. This is done by first switching on the hash code of the label. The corresponding case is an if statement.. that tests string equality if there are collisions on the hash the test is a cascading if else if . The second switch mirrors.. used. The lookupswitch is suitable for the first switch on hash codes to find the original position of the case. The resulting..
How to use the toString method in Java? http://stackoverflow.com/questions/3615721/how-to-use-the-tostring-method-in-java `@' and the unsigned hexadecimal representation of the hash code of the object. In other words this method returns a string.. to the value of getClass .getName '@' Integer.toHexString hashCode Example String mystr a b c System.out.println mystr.toString..
How to find a Java Memory Leak http://stackoverflow.com/questions/40119/how-to-find-a-java-memory-leak Basically I can tell that there are several hundred meg of hash table entries java.util.HashMap Entry or something like that..
http://stackoverflow.com/questions/415953/generate-md5-hash-in-java MD5 hash in Java Possible Duplicate Getting a File 䏭 MD5 Checksum in.. 䏭 MD5 Checksum in Java Is there any method to generate MD5 hash of a string in Java java hash md5 hashcode share improve.. any method to generate MD5 hash of a string in Java java hash md5 hashcode share improve this question MessageDigest is..
How do I address unchecked cast warnings? http://stackoverflow.com/questions/509076/how-do-i-address-unchecked-cast-warnings theHash Problem was elsewhere when you tried to use the hash you'd get warnings HashMap items getItems session items.put..
How does a HashMap work in Java? http://stackoverflow.com/questions/6493605/how-does-a-hashmap-work-in-java I think Its perfectly legal for two objects to have same hashcode. If two objects are equal using equals then they have same.. If two objects are equal using equals then they have same hashcode. If two object are not equal then they cannot have same.. If two object are not equal then they cannot have same hashcode Am I correct Now if am correct I have following doubt HashMap..
NoClassDefFoundError JsonAutoDetect while parsing JSON object http://stackoverflow.com/questions/10094300/noclassdeffounderror-jsonautodetect-while-parsing-json-object for User Data object Map String Object userData new HashMap String Object Map the names into one struct. In the code.. submitted on the form. Map String String nameStruct new HashMap String String nameStruct.put fName request.getParameter fname.. same logic as the names. Map String String emailStruct new HashMap String String emailStruct.put email request.getParameter..
Instructions reordering in Java JVM http://stackoverflow.com/questions/12554570/instructions-reordering-in-java-jvm calchash h R2 Storing the R2 to local variable h hash h Hash h write to hash return hash R3 read hash from memory again..
http://stackoverflow.com/questions/1817524/generic-arrays-in-java extends Comparable. When I try the following public class Hash T extends Comparable String private T hashTable private int.. String private T hashTable private int tableSize Hash int records double load tableSize int records loadFactor tableSize..
The fundamentals of Hash tables? http://stackoverflow.com/questions/282712/the-fundamentals-of-hash-tables fundamentals of Hash tables I'm quite confused about the basic concepts of a Hash.. tables I'm quite confused about the basic concepts of a Hash table. If I were to code a hash how would I even begin What.. how would I even begin What is the difference between a Hash table and just a normal array Basically if someone answered..
Suggestions for library to hash passwords in Java http://stackoverflow.com/questions/2860943/suggestions-for-library-to-hash-passwords-in-java passwords in Java What Java library should I be using to Hash passwords for storage in a database I was hoping to just take..
Hash String via SHA-256 in Java http://stackoverflow.com/questions/3103652/hash-string-via-sha-256-in-java String via SHA 256 in Java By looking around here as well as.. some other freely available utility to generate a SHA 256 Hash of a String in Java. Looking at their documentation I can't..
How to generate an HMAC in Java equivalent to a Python example? http://stackoverflow.com/questions/3208160/how-to-generate-an-hmac-in-java-equivalent-to-a-python-example with Java. Here is an example of Python generating a Hash Based Message Authentication Code HMAC # usr bin python from..
Android - how to encrypt a string? http://stackoverflow.com/questions/3934331/android-how-to-encrypt-a-string a given string public String md5 String s try Create MD5 Hash MessageDigest digest java.security.MessageDigest.getInstance..
Key hash for Facebook Android SDK http://stackoverflow.com/questions/4347924/key-hash-for-facebook-android-sdk to be asking you but I can't figure out how to get the Key Hash required to use the Facebook Android SDK. I am very new at this..
How do HashTables deal with collisions? http://stackoverflow.com/questions/4980757/how-do-hashtables-deal-with-collisions do HashTables deal with collisions I've heard in my degree classes.. with collisions I've heard in my degree classes that a HashTable will place a new entry into the 'next available' bucket.. if the new Key entry collides with another. How would the HashTable still return the correct Value if this collision occurs..
Facebook Android Generate Key Hash http://stackoverflow.com/questions/5306009/facebook-android-generate-key-hash Android Generate Key Hash Hey I'm trying to create an android app with Facebook integration.. or password was incorrect I just want to generate my Key Hash Can anyone point me in the right direction Cheers Scott java..
Interesting uses of sun.misc.Unsafe http://stackoverflow.com/questions/5574241/interesting-uses-of-sun-misc-unsafe ie CAS Compare And Swap used in Lock Free Hash Tables eg sun.misc.Unsafe.compareAndSwapInt it can make real..
Need to generate HMAC SHA256 hash in Objective C as in Java http://stackoverflow.com/questions/8458917/need-to-generate-hmac-sha256-hash-in-objective-c-as-in-java I have this Objective C function Hash method Definition NSString getHashEncription NSString key andData.. Objective C function Hash method Definition NSString getHashEncription NSString key andData NSString data NSLog @ Secret.. initWithData HMAC encoding NSASCIIStringEncoding End of getHashEncription The output which I am getting is this 8736bc4aa7fc3aa071f2b4262b6972a89d2861559a20afa765e46ff17cb181a9..
Application vulnerability due to Non Random Hash Functions http://stackoverflow.com/questions/8669946/application-vulnerability-due-to-non-random-hash-functions vulnerability due to Non Random Hash Functions Below excerpt is from an article that explains possibility.. DoS attack because of non random hash functions used in Hash Data Structures. 因 the condition can be leveraged by exploiting.. verify it I went through reference implementation of Java HashMap from Oracle and indeed found a static hash functions used..
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