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java Programming Glossary: equalWhen comparing two Integers in Java does auto-unboxing occur? http://stackoverflow.com/questions/1514910/when-comparing-two-integers-in-java-does-auto-unboxing-occur comparing two boxed Integers and want to compare either equality or less than greater than Integer a 4 Integer b 5 if a b.. No between Integer Long etc will check for reference equality i.e. Integer x ... Integer y ... System.out.println x y this.. check whether x and y refer to the same object rather than equal objects. So Integer x new Integer 10 Integer y new Integer 10..
Difference between DTO, VO, POJO, JavaBeans? http://stackoverflow.com/questions/1612334/difference-between-dto-vo-pojo-javabeans You can usually tell them because their notion of equality isn't based on identity instead two value objects are equal.. isn't based on identity instead two value objects are equal if all their fields are equal. Although all fields are equal.. two value objects are equal if all their fields are equal. Although all fields are equal you don't need to compare all..
whats the difference between “.equals and ==” http://stackoverflow.com/questions/1643067/whats-the-difference-between-equals-and the difference between &ldquo .equals and &rdquo I switched lecturers today and he stated using.. using a weird code to me. He said its better to use .equals and when i asked why he answered because it is so much for.. because it is so much for that. so here's an example if o1.equals o2 System.out.println Both integer objects are the same instead..
Why 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.. Document . The document is all about defining hashCode and equals effectively and correctly but I am not able to figure out why.. the decision to implement these method efficiently java equals hashcode share improve this question It is not always necessary..
How to use the toString method in Java? http://stackoverflow.com/questions/3615721/how-to-use-the-tostring-method-in-java of the object. In other words this method returns a string equal to the value of getClass .getName '@' Integer.toHexString hashCode..
If profiler is not the answer, what other choices do we have? http://stackoverflow.com/questions/4387895/if-profiler-is-not-the-answer-what-other-choices-do-we-have point at which a function is called has a percentage cost equal to the fraction of time it is on the stack. Note the paper is..
Moving decimal places over in a double http://stackoverflow.com/questions/4937402/moving-decimal-places-over-in-a-double decimal places over in a double So I have a double set to equal 1234 I want to move a decimal place over to make it 12.34 So..
How to find a button source in AWT (calculator homework) http://stackoverflow.com/questions/7441625/how-to-find-a-button-source-in-awt-calculator-homework button using getSource like when I press button 1 and 2 is equal to 3. heres what ive done import java.awt. import java.awt.event... buttons . addButton buttons C addButton buttons JButton equals new JButton equals.addKeyListener this controls.add equals.. buttons C addButton buttons JButton equals new JButton equals.addKeyListener this controls.add equals equals.addActionListener..
Java String.equals versus == [duplicate] http://stackoverflow.com/questions/767372/java-string-equals-versus String.equals versus duplicate This question already has an answer here.. java string share improve this question Use the String.equals String other function to compare strings not the operator... operator checks whether the references to the objects are equal. Note that string constants are usually interned such that two..
What are the reasons why Map.get(Object key) is not (fully) generic http://stackoverflow.com/questions/857420/what-are-the-reasons-why-map-getobject-key-is-not-fully-generic the specification of the method only requires that they be equal. This follows from how the equals method takes in an Object.. requires that they be equal. This follows from how the equals method takes in an Object as parameter not just the same type.. Although it may be commonly true that many classes have equals defined so that its objects can only be equal to objects of..
Difference Between Equals and == http://stackoverflow.com/questions/971954/difference-between-equals-and to the same object. This is also called reference equality . Java doesn't have any user defined operator overloading... it will behave like Java i.e. comparing for reference equality . However if there's an overload which matches the compile.. can behave how it wants but it typically implements value equality i.e. a and b can refer to different but equal values and..
http://stackoverflow.com/questions/1990734/hashcode-and-equals and equals For Every Equal Object their Hashcode must be equal. Java returns a unique hashcode.. varies java hashcode share improve this question Equality is only determined by method equals . And method hashCode..
Java Arrays.equals() returns false for two dimensional arrays http://stackoverflow.com/questions/2721033/java-arrays-equals-returns-false-for-two-dimensional-arrays i j 1.0 b i j 1.0 if Arrays.equals a b System.out.println Equal else System.out.println Not equal Returns false and prints Not.. i a i 1.0 b i 1.0 if Arrays.equals a b System.out.println Equal else System.out.println Not equal returns true and prints Equal.. else System.out.println Not equal returns true and prints Equal . Does the method only work with single dimensions if so is..
If == compares references in Java, why does it evaluate to true with these Strings? http://stackoverflow.com/questions/4033625/if-compares-references-in-java-why-does-it-evaluate-to-true-with-these-strin to the same object on a heap. If so why am I getting the Equal for this piece of code public class Salmon public static void.. Str1 String str2 Str1 if str1 str2 System.out.println Equal else System.out.println Not equal java string reference .. share improve this question The program will print Equal . At least using the Sun Hotspot and suns Javac. Here it is..
Equal strings aren't equal (==) in Java? [duplicate] http://stackoverflow.com/questions/6178585/equal-strings-arent-equal-in-java strings aren't equal in Java duplicate Possible Duplicate Strings..
http://stackoverflow.com/questions/653861/join-two-wav-files-from-java the simplest way to concatenate two WAV files in Java 1.6 Equal frequency and all nothing fancy. This is probably sooo simple..
Comparing two identical strings with == returns false [duplicate] http://stackoverflow.com/questions/7375427/comparing-two-identical-strings-with-returns-false objects int x 5 int y 5 if x.equals y System.out.println Equal A reference is basically a chunk of memory that explicitly tells.. 5 Integer y new Integer 5 if x.equals y System.out.println Equal Whereas this would not give the expected result the if condition.. 5 Integer y new Integer 5 if x y System.out.println Equal This is because the two Integer objects have the same value..
Java Array HashCode implementation http://stackoverflow.com/questions/744735/java-array-hashcode-implementation this 4177328 4097744 328041 2083945 System.out.println Equal java.util.Arrays.equals foo bar java.util.Arrays.equals bar..
How != and == operators work on Integers in Java? http://stackoverflow.com/questions/9824053/how-and-operators-work-on-integers-in-java ver1 Integer a 128 Integer b 128 if a b System.out.println Equal Object if a b System.out.println Different objects if a.equals.. Integer i1 127 Integer i2 127 if i1 i2 System.out.println Equal Object if i1 i2 System.out.println Different objects if i1.equals.. output Different objects Meaningfully equal. ver2 output Equal Object Meaningfully equal Why the and testing produces different..
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