Question

import java.io.IOException;
import java.util.*;

public class calling {


public static int num1() {
int x;
Scanner scanner = new Scanner (System.in);
System.out.println("Please enter a number called x: ");
x=scanner.nextInt();
return x;    
}

public static int num2() {
int y;
Scanner scanner = new Scanner (System.in);
System.out.println("Please enter a second number called y: ");
y=scanner.nextInt();
return y;    
}

public static String operand() {
Scanner input = new Scanner (System.in);
String s;
System.out.println("What process would you like to do? *, /, + or - ?");
s=input.next();
return s;
}

public static void calculation(int x, int y, String s) {
String t;
Scanner input = new Scanner(System.in);


if (s.equals("*")) {
System.out.println("\nThe product of these numbers is:" + (x*y));}
else 
if (s.equals("+")) {
System.out.println("\nThe sum of these numbers is: " + (x+y));}

System.out.println("\nDo you want x or y to be the dividor/subtractor?: ");
t=input.next();

if (t.equals("y") || t.equals("Y") ) {

if (s.equals("/")) {
System.out.println("\nThe quotient of these numbers is:  " + (x/y));}
else 
if (s.equals("-")) {
System.out.println("\nThe difference of these numbers is: " + (x-y));}}

else 
if (t.equals("x") || t.equals("X")){

if (s.equals("/")) {
System.out.println("\nThe quotient of these numbers is: " + (y/x));}
else 
if (s.equals("-")) {
System.out.println("\nThe difference of these numbers is: " + ((y-x)));}}
}

public static void  main (String [] args) throws IOException {


int x1=num1();
int y1=num2();
String s1=operand();
calculation(x1, y1, s1);




}

}

How would I call these methods into a new class so i can run the program from it? I understand typically you would put the name of the class.nameofmethod(); but how would i pass the parameters and such?
I am a beginner in Java so all help would be greatly appreciated!
thanks in advance guys.

Answer 1

Since all the methods are static you can just do:

int x1=calling.num1();
int y1=calling.num2();
String s1=calling.operand();
calling.calculation(x1, y1, s1);

But, if you didn’t make them static and you wanted to call them then you instantiate a class and call the methods in that class.

calling app = new calling();
int x1=app.num1();
int y1=app.num2();
String s1=app.operand();
app.calculation(x1, y1, s1);