java 

Exercise1:  

Write a program that takes three integer numbers from the console as inputs. For each number, the program should call a static method named isPositive() to determine if a number is positive, negative, or equal to zero.

Exercise 3:

The following code asks a user to enter her/his age then determines if a user is an adult or not. Trace the code, to find and solve the syntax errors. You need to identify the errors and rewrite the correct code. 

import java.util.Scanner;

public class Ex3 {

       public static void main(String[] args) {

              Scanner input = new Scanner(System.in);

              System.out.println("Enter your age:");

              int age = input.nextInt();

              double flag = isAdult(double age);

              if(flag) {

                     System.out.println("You are an adult.");

              } else {

                     System.out.println("You are not an adult.");

              }

       }

       public boolean isAdult(int age) {

              if(age > 18) {

                     return true;

              } else {

                     return false;

              }

       }

}

Exercise 4:

Write a program to do the following using the Math class:

• Ask a user to enter two integer numbers
• Finds the square root of each number
• Finds the minimum
• Finds the maximum

Exercise 5:

Write a program to calculate area of circle. The main method should pass the radius of the circle to a static method named calculateArea(). The program should display the calculated area inside the main method.