Methods
General form of a method definition:
type name(parameter-list) {
... return value;
...
}
Components:
1) type - type of values returned by the method. If a method does not return any value, its return type must be void.
2) name is the name of the method
3) parameter-list is a sequence of type-identifier lists
separated by commas
4) return value indicates what value is returned by the method.
Example: Method
Classes declare methods to hide their internal data
structures, as well as for their own internal use: Within a
class, we can refer directly to its member variables:
class Box {
double width, height, depth;
void volume() {
System.out.print("Volume is ");
System.out.println(width * height * depth);
}
}
Parameterized Method
• Parameters increase generality and applicability of a
method:
• 1) method without parameters :
int square() { return 10*10; }
• 2) method with parameters :
int square(int i) { return i*i; }
• Parameter: a variable receiving value at the time the
method is invoked.
• Argument: a value passed to the method when it is
invoked.