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pls tell me about boxing and unboxing
| the boxing and unboxing has come into the java-5. Boxing is known as the autoboxing. "The automatic conversion of Primitive data types(int,float,char,double,short etc.) into a Wrapper class is known as the autoboxing or boxing. And the reverse is that the unboxing. Example- class A { int a=3; Integer aa=new Integer(a)//Boxing } here the int converts to the object through a wrapper class. and the reverse is that... class A { Integer aa=new Integer(4) int aa=5; } here is a boxing. -Amit Saxena |  0 |
By: [email protected] On: Mon Mar 25 11:06:04 IST 2013  0  -4  0 | -4 |
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| Java 5 (and hence AspectJ 1.5) supports automatic conversion of primitive types (int, float, double etc.) to their object equivalents (Integer, Float, Double,...) in assignments and method and constructor invocations. This conversion is know as autoboxing. Java 5 also supports automatic unboxing, where wrapper types are automatically converted into their primitive equivalents if needed for assignments or method or constructor invocations. For example: int i = 0; i = new Integer(5); // auto-unboxing Integer i2 = 5; // autoboxing ------------------------------------------------------------- When Java automatically converts a primitive type like int into corresponding wrapper class object e.g. Integer than its called autoboxing because primitive is boxed into wrapper class while in opposite case is called unboxing, where an Integer object is converted into primitive int. All primitive types e.g. byte, short, char, int, long, float, double and boolean has corresponding wrapper class e.g. Byte, Short, Integer, Character etc and participate in autoboxing and unboxing. Since whole process happens automatically without writing any code for conversion its called autoboxing and auto unboxing. | 0 |
| By: [email protected] On: Mon Mar 25 12:06:55 IST 2013 0 392 0 | 392 |
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