1. 1 MATERI PENDUKUNG METHOD Matakuliah: M0074/PROGRAMMING II Tahun: 2005 Versi: 1/0

2. 2 Methods Allow programmers to modularize programs –Makes program development more manageable –Software reusability –Avoid repeating code Local variables –Declared in method declaration Parameters –Communicates information between methods via method calls General format of method declaration: –return-value-type method-name ( parameter1, parameter2, …, parameterN ) { declarations and statements }

3. 3 Method can also return values: return expression ; Method Overloading –Several methods of the same name –Different parameter set for each method Number of parameters Parameter types –Example: void print(int a); void print(char c); void print(int a, char c); void print(char c, int a);

4. 4 Recursive method –Calls itself (directly or indirectly) through another method –Method knows how to solve only a base case –Method divides problem Base case Simpler problem –Method now divides simpler problem until solvable –Recursive call –Recursive step

5. 5 Two ways to pass arguments to methods –Pass-by-value Copy of argument’s value is passed to called method In Java, every primitive is pass-by-value –Pass-by-reference Caller gives called method direct access to caller’s data Called method can manipulate this data Improved performance over pass-by-value In Java, every object is pass-by-reference –In Java, arrays are objects »Therefore, arrays are passed to methods by reference