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syntactic unit > access unit > variable > parameter > method parameter |
method parameter | ||||
subject | fact |
method parameter |
| |
has example //Example of 2 method parameters, one integer and one array, shown in bold | ||
has purpose to pass values into methods | ||
hides instance variable of the class | ||
is a subtopic of Methods | ||
is a kind of parameter | ||
parameter | can have the same name as a member variable | |
is initialized by calling the method or constructor or exception handler | ||
is passed by value | ||
variable | can be accessed by other variables and methods in any class in the same package by default | |
can contain different classes of objects depending on the type of the variable | ||
can contain only values that are of the same type as the variable or a subtype of the variable's type | ||
can have an interface as its type which means that, with the variable, you can invoke any operation supported by the interface | ||
can refer to a particular object, several different objects during the execution of a program, or no object at all | ||
has 1 value at any one time which is the that it refers to | ||
has 1 name | ||
has scope which is the block in which it is declared | ||
has type | ||
has lifetime which is the time its block is being executed | ||
has scope | ||
has part value | ||
is declared by giving the data type followed by the name of the variable | ||
is destroyed in the block where it is declared | ||
may have access modifier | ||
refers to a class or an object or a primitive datum | ||
should be as private as possible | ||
should have comment if it is non-obvious | ||
access unit | has access mode | |
syntactic unit | has syntax rule bold = mandatory |
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