Method parameters and return values in JAVA classes, and return values of java Parameters

Method parameters and return values in JAVA classes, and return values of java Parameters

The public void method is used to declare a method without any parameters or return values;

The public void method is used to declare a method with no return value;

A method with a return value of a parameter is declared by using the public int method name (int I, int n) (int is the parameter's data type specified, or it can be another data type, for example: string, char, double, int ).

Instance:

// Define the class public class Test {// public void eat () {System. out. println ("I'm eating. ") ;}// Public void cheng (int I, int n) {System. out. println (I * n);} // public int getAge (int a) {return a;} public static void main (String [] args) {Test Myclass = new Test (); // create the object Myclass. eat (); // call the Myclass method. cheng (9,9); // call the method System. out. println (Myclass. getAge (18); // call method }}