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java Programming Glossary: primitiveWhen comparing two Integers in Java does auto-unboxing occur? http://stackoverflow.com/questions/1514910/when-comparing-two-integers-in-java-does-auto-unboxing-occur auto unboxing occur I know that if you compare a boxed primitive Integer with a constant such as Integer a 4 if a 5 a will automatically.. type value is unboxed and the test is applied to the primitive values involved. This occurs as part of binary numeric promotion.. operator must be a type that is convertible §5.1.8 to a primitive numeric type or a compile time error occurs. Binary numeric..
What is a Null Pointer Exception? http://stackoverflow.com/questions/218384/what-is-a-null-pointer-exception the following code where you declare a variable of primitive type int int x x 10 In this example the variable x is an int.. declares a variable named num but it does not contain a primitive value. Instead it contains a pointer because the type is Integer..
What is the memory consumption of an object in Java? http://stackoverflow.com/questions/258120/what-is-the-memory-consumption-of-an-object-in-java endian with any amount of padding or overhead though primitives must behave as if they had the official sizes. For example.. used For instance Wrappers can be costly too compared to primitive type for attributes Integer The 16 byte result is a little worse.. overhead compared to when I can store the value as a primitive type Long 16 bytes also Clearly actual object size on the heap..
Why don't Java Generics support primitive types? http://stackoverflow.com/questions/2721546/why-dont-java-generics-support-primitive-types don't Java Generics support primitive types Why do Generics in Java work with objects but not with.. Why do Generics in Java work with objects but not with primitive types For example Gen Integer inum new Gen Integer 100 works.. int inums new Gen int 100 is not allowed. java generics primitive share improve this question Generics in Java are an entirely..
http://stackoverflow.com/questions/3130311/weird-integer-boxing-in-java see the last paragraph quoted below Ideally boxing a given primitive value p would always yield an identical reference. In practice..
Change private static final field using Java reflection http://stackoverflow.com/questions/3301635/change-private-static-final-field-using-java-reflection is true . What's actually done here is as follows The primitive boolean values true and false in main are autoboxed to reference.. Expression It's unlikely that this technique works with a primitive private static final boolean because it's inlineable as a compile..
How to use the toString method in Java? http://stackoverflow.com/questions/3615721/how-to-use-the-tostring-method-in-java methodcall by default. the purpose of this method convert primitive data into object data or String data. java share improve..
Integer wrapper objects share the same instances only within the value 127? http://stackoverflow.com/questions/5117132/integer-wrapper-objects-share-the-same-instances-only-within-the-value-127 is always the case that r 1 r 2 . Ideally boxing a given primitive value p would always yield an identical reference. In practice..
In Java, what is the best way to determine the size of an object? http://stackoverflow.com/questions/52353/in-java-what-is-the-best-way-to-determine-the-size-of-an-object Is there a reference that defines how large primitive types and object references are for a VM Right now I have code..
Varargs in method overloading in Java http://stackoverflow.com/questions/12879910/varargs-in-method-overloading-in-java to select when Boxing Widening and Var args are combined Primitive widening uses the smallest method argument possible Wrapper..
Eclipse bug? When is a short not a short? http://stackoverflow.com/questions/14297113/eclipse-bug-when-is-a-short-not-a-short from int to short short notShort 655254 Reference Java Primitive Data Types . java eclipse share improve this question It's..
When to use wrapper class and primitive type http://stackoverflow.com/questions/1570416/when-to-use-wrapper-class-and-primitive-type Or On what circumstance i should choose between wrapper Primitive types java wrapper primitive types share improve this question..
Primitive cast and assignments in Java http://stackoverflow.com/questions/17110918/primitive-cast-and-assignments-in-java cast and assignments in Java I understand why the following..
String can't change. But int, char can change http://stackoverflow.com/questions/1956376/string-cant-change-but-int-char-can-change at some point derives from Object follows these rules. Primitive values such as ints bools chars floats and doubles allow the..
Java code To convert byte to Hexadecimal http://stackoverflow.com/questions/2817752/java-code-to-convert-byte-to-hexadecimal
Why does autoboxing in Java allow me to have 3 possible values for a boolean? http://stackoverflow.com/questions/2923249/why-does-autoboxing-in-java-allow-me-to-have-3-possible-values-for-a-boolean language and you should not code as if this is the case. Primitive types will never go away and in fact should be preferred whenever.. to boxed primitive whenever you have the choice. Primitive types are simpler and faster. If you must use boxed primitives..
Why does int num = Integer.getInteger(“123”) throw NullPointerException? http://stackoverflow.com/questions/3123349/why-does-int-num-integer-getinteger123-throw-nullpointerexception to boxed primitive whenever you have the choice. Primitive types are simpler and faster. If you must use boxed primitives..
Why comparing Integer with int can throw NullPointerException in Java? http://stackoverflow.com/questions/3352791/why-comparing-integer-with-int-can-throw-nullpointerexception-in-java to boxed primitive whenever you have the choice. Primitive types are simpler and faster. If you must use boxed primitives.. to use boxed primitives is justified. References JLS 4.2. Primitive Types and Values The numeric types are the integral types and..
http://stackoverflow.com/questions/350063/java-equivalent-of-stddeque . java collections deque share improve this question Primitive Collections for Java has an ArrayDeque with a get int idx method...
Primitive or wrapper for hibernate primary keys http://stackoverflow.com/questions/3535791/primitive-or-wrapper-for-hibernate-primary-keys or wrapper for hibernate primary keys I've been looking at..
Primitive type 'short' - casting in Java http://stackoverflow.com/questions/477750/primitive-type-short-casting-in-java type 'short' casting in Java I have a question about the primitive..
How to make a color transparent in a BufferedImage and save as PNG http://stackoverflow.com/questions/665406/how-to-make-a-color-transparent-in-a-bufferedimage-and-save-as-png BufferedImage image Color c1 Color c2 Primitive test just an example final int r1 c1.getRed final int g1 c1.getGreen..
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