"Song Hongkang Learning Diary 7" Object-oriented Programming "2" class and method

11 Anonymous class New Circle ();(created can only be used once no longer called)

Two variable number parameter forms (component overloads)

public int getsum () {}

public int Getsum (int i,int j) {}

public int getsum (int ... args) {}=public int getsum (int[] aargs)

"Note" If there is a variable number of formal parameters in the method, it is declared in the post public void SayHello (int i,string...str) (there is a maximum of one variable number of parameters in a method)

Parameter passing of three methods

1 delivery mechanism: value passing (a copy of the actual parameter is passed in the method, and the parameter itself is not affected)

The 2 parameter is the basic data type, and the value of the argument is passed to the variable of the basic data type of the formal parameter;

A 3 parameter is a reference data type that passes the value of the argument's reference type variable (the first address of the entity value of the heap space object) to the reference variable of the formal parameter.

"Song Hongkang Learning Diary 7" Object-oriented Programming "2" class and method