Java: Accept three integers and return the middle one

Last update on December 21 2024 09:40:58 (UTC/GMT +8 hours)

Check If One Integer is Midpoint of Others

Write a Java method that accepts three integers and returns true if one is the middle point between the other two integers, otherwise false.

Pictorial Presentation:

Sample data:
(2, 4, 6) -> true
(2, 8, 5) -> true
(6, 6, 6) -> true
(20, 7, -6) -> true
(1, 2, 5) -> false
(5, 1, 5) -> false
(3, 9, 14) -> false

Sample Solution-1:

Java Code:

import java.util.Scanner;
public class Main { 
 public static void main(String[] args)
    {
        Scanner in = new Scanner(System.in);
        System.out.print("Input the first number: ");
        int x = in.nextInt();
        System.out.print("Input the second number: ");
        int y = in.nextInt();
        System.out.print("Input the third number: ");
        int z = in.nextInt();
        System.out.print("Check whether the three said numbers has a midpoint!\n");
        System.out.print(test(x,y,z));
        }

 public static boolean test(int x, int y, int z){
    int max = Math.max(x, Math.max(y,z));
    int min = Math.min(x, Math.min(y,z));
    double mid_point1 = (max + min) / 2.0;
    int mid_point2 = x + y + z - max - min;
    return (mid_point1 == mid_point2);
  }
}

Sample Output:

Input the first number:  2
Input the second number:  4
Input the third number:  6
Check whether the three said numbers has a midpoint!
true

Flowchart :

Sample Solution-2:

Java Code:

import java.util.Scanner;
public class Main { 
 public static void main(String[] args)
    {
        Scanner in = new Scanner(System.in);
        System.out.print("Input the first number: ");
        int x = in.nextInt();
        System.out.print("Input the second number: ");
        int y = in.nextInt();
        System.out.print("Input the third number: ");
        int z = in.nextInt();
        System.out.print("Check whether the three said numbers has a midpoint!\n");
        System.out.print(test(x,y,z));
        }
public static boolean test(int x, int y, int z) {
       boolean midpoint_x = ( y + z == 2 * x); 
       boolean midpoint_y = ( x + z == 2 * y);
       boolean midpoint_z = ( x + y == 2 * z);
       return midpoint_x || midpoint_y || midpoint_z;
   }
}

Sample Output:

Input the first number:  3
Input the second number:  9
Input the third number:  14
Check whether the three said numbers has a midpoint!
false

Flowchart :

Java Code Editor:

Contribute your code and comments through Disqus.

Previous Java Exercise: Three integers and check whether they are consecutive.
Next Java Exercise: Extract the first digit from an integer