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Write an interface class Calculator.
The class has the following properties:
Methods add, subtract, multiply, and divide.
All methods are of void type and each takes a single integer as a parameter.
A method getResult, which has no parameters.
This method returns a double-type floating-point number.
import java.util.Random;
public class Test{
public static void main(String[] args){
final Random r = new Random();
System.out.println("Testing the calculator interface...");
Calculator c = new CalculatorTest();
c.add(1);
System.out.println("add(int number) ok");
c.subtract(1);
System.out.println("subtract(int number) ok");
c.multiply(1);
System.out.println("multiply(int number) ok");
c.divide(1);
System.out.println("divide(int number) ok");
double d = c.getResult();
System.out.println("getResult() ok");
}
}
//ADD
interface Calculator {
void add(int number);
void subtract(int number);
void multiply(int number);
void divide(int number);
double getResult();
}
Testing the calculator interface...
add(int number) ok
subtract(int number) ok
multiply(int number) ok
divide(int number) ok
getResult() ok
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