Code Gyms flags the criterion of displaying all three numbers if equal. What am I doing wrong?

Question about the task

Do we have a pair?

Java Syntax, Level 4, Lesson 4

Under discussion

Use the keyboard to enter three integers. Determine whether there is at least one pair of equal numbers among them.
If such a pair exists, display the numbers separated by a space.
If all three numbers are equal, then display all three.

Here are some examples:
a) if you enter the numbers
1
2
2
then we display
2 2

b) if you enter the numbers
2
2
2
then we display
2 2 2

Requirements:

The program should read the numbers from the keyboard.
The program should contain System.out.println() or System.out.print().
If two numbers are equal to each other, you must display them on the screen.
If all three numbers are equal, then display all three.
If there are no equal numbers, don't display anything.

package com.codegym.task.task04.task0417; /* Do we have a pair? */ import java.io.*; public class Solution { public static void main(String[] args) throws Exception { BufferedReader in = new BufferedReader (new InputStreamReader(System.in)); String sNumber1 = in.readLine(); String sNumber2 = in.readLine(); String sNumber3 = in.readLine(); int num1 = Integer.parseInt(sNumber1); int num2 = Integer.parseInt(sNumber2); int num3 = Integer.parseInt(sNumber3); if (num1 == num2) System.out.println(num1+" "+num2); if (num2 == num3) System.out.println(num2+" "+num3); if (num1 == num3) System.out.println(num1+" "+num3); if ((num1 == num2) && (num2 == num3) && (num1 == num3)) System.out.println (num1+" "+num2+" "+num3); } }

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Alvin B

Level 8 , Newark, United States

29 April 2020, 18:09

It worked. Thank you so much for your help.

WIDMO

Level 25 , Gdańsk, Poland

Expert

29 April 2020, 08:37

Everything is fine, you just need to change the order of IF-statements and change it to IF-ELSE

if ((num1 == num2) && (num2 == num3) && (num1 == num3))
    System.out.println(num1 + " " + num2 + " " + num3);
else if (num1 == num2) System.out.println(num1+" "+num2);
else if (num2 == num3) System.out.println(num2+" "+num3);
else if (num1 == num3) System.out.println(num1+" "+num3);

In alternative solution just can change the order to check if all the numbers are the same and if so, change this IF to some thing like this before checking the rest IFs

if ((num1 == num2) && (num2 == num3) && (num1 == num3)) {
    System.out.println(num1 + " " + num2 + " " + num3);
    return;
}

this RETURN will asure you that the program will ends before checking id any pair of numbers are the same.