FizzBuzz je igra, ki je priljubljena med otroki. Z igranjem se otroci naučijo delitve. Zdaj pa FizzBuzz Igra je postala priljubljeno programersko vprašanje, ki se pogosto postavlja v Java programiranje intervjuji. V tem razdelku se bomo naučili ustvariti a Program FizzBuzz v Javi .
Pravila igre FizzBuzz
Pravila igre FizzBuzz so zelo preprosta.
- Reci Fizz če je število deljivo z 3 .
- Reci Buzz če je število deljivo z 5 .
- Reci FizzBuzz če je število deljivo z oboje 3 in 5.
- Vrnite število sama, če je številka ni deljivo s 3 in 5.
Opomba: Namesto 3 in 5 lahko uporabite tudi različne delilnike (na primer 5 in 7 itd.) in niz (Fizz in Buzz).
Implementirajmo zgornja pravila v program Java.
Program Java FizzBuzz
Obstajata dva načina za ustvarjanje programa FizzBuzz v Javi:
- Uporaba izjave else-if
- Uporaba Jave 8
Uporaba stavka else-if
V naslednjem programu od uporabnika preberemo celo število (n), ki je zgornja meja za tiskanje Fizz ali Buzz ali FizzBuzz. Zanka for se začne od 1 in se izvaja, dokler ni izpolnjen pogoj i<=n 3 5 becomes false. the else-if statement to check number is multiple of and or not.< p>
FizzBuzzExample1.java
import java.util.Scanner; public class FizzBuzzExample1 { public static void main(String args[]) { //constructor of the scanner class Scanner sc = new Scanner(System.in); System.out.print('Enter the number: '); //reads an integer from the user int n = sc.nextInt(); System.out.println('The Fizz, Buzz, and FizzBuzz numbers are: '); //for loop executes until the condition i<=n 3 5 becomes false for (int i="1;" <="n;" i++) { returns true if both the conditions return (i%3="=0" && i%5="=0)" prints number is multiple of and system.out.print('fizzbuzz'); } executes condition else system.out.print('fizz'); (i%5="=0)" system.out.print('buzz'); itself not divisible by system.out.print(i); space system.out.print(','+' '); close scanner sc.close(); pre> <p> <strong>Output:</strong> </p> <img src="//techcodeview.com/img/java-tutorial/88/fizzbuzz-program-java.webp" alt="FizzBuzz Program in Java"> <h3>Using Java 8</h3> <p>Java 8 provides the <strong>IntStream</strong> interface. We have used the following two methods of the IntStream interface.</p> <p> <strong>rangeClosed() Method:</strong> It is the static method of the IntStream interface. It returns a sequential IntStream for the specified range.</p> <p> <strong>Syntax:</strong> </p> <pre> static IntStream rangeClosed(int startInclusive, int endInclusive) </pre> <p>The method parses two parameters:</p> <ul> <tr><td>startInclusive:</td> It is the initial value. </tr><tr><td>endInclusive:</td> The inclusive upper bound. </tr></ul> <h3>Using mapToObj() Method</h3> <p>The method performs an intermediate operation and returns an object-valued Stream consisting of the results of applying the given function to the elements of this stream.</p> <p> <strong>Syntax:</strong> </p> <pre> Stream mapToObj(IntFunction mapper) </pre> <p>The method parses a parameter <strong>mapper</strong> (of element type of new stream). It returns the new stream.</p> <p> <strong>FizzBuzzExample2.java</strong> </p> <pre> import java.util.*; import java.util.stream.IntStream; public class FizzBuzzExample2 { public static void main(String args[]) { Scanner sc = new Scanner(System.in); System.out.print('Enter the number:'); //reads an integer from the user int num = sc.nextInt(); //the rangeClosed() method returns a sequential IntStream for the specified range of int elements //for-each iterate over the Stream and prints the elements IntStream.rangeClosed(1, num).mapToObj(i->i%3==0?(i%5==0? 'FizzBuzz ':'Fizz '):(i%5==0? 'Buzz ': i+' ')).forEach(System.out::print); //close the Scanner sc.close(); } } </pre> <p> <strong>Output:</strong> </p> <pre> Enter the number: 40 1 2 Fizz 4 Buzz Fizz 7 8 Fizz Buzz 11 Fizz 13 14 FizzBuzz 16 17 Fizz 19 Buzz Fizz 22 23 Fizz Buzz 26 Fizz 28 29 FizzBuzz 31 32 Fizz 34 Buzz Fizz 37 38 Fizz Buzz </pre> <p>Note that, in the above program the logic for FizzBuzz is adjusted into one line by using the <a href="/ternary-operator-java">ternary operator</a> . It reduces the line of code. We have printed <strong>Fizz</strong> if the number is multiple of 3, prints <strong>Buzz</strong> if the number is multiple of 5, prints <strong>FizzBuzz</strong> if the number is multiple of 3 and 5, else prints the <strong>number</strong> itself.</p> <hr></=n> Metoda razčleni dva parametra:
Uporaba metode mapToObj().
Metoda izvede vmesno operacijo in vrne tok z objektno vrednostjo, sestavljen iz rezultatov uporabe dane funkcije za elemente tega toka.
Sintaksa:
Stream mapToObj(IntFunction mapper)
Metoda razčleni parameter mapper (tipa elementa novega toka). Vrne nov tok.
FizzBuzzExample2.java
import java.util.*; import java.util.stream.IntStream; public class FizzBuzzExample2 { public static void main(String args[]) { Scanner sc = new Scanner(System.in); System.out.print('Enter the number:'); //reads an integer from the user int num = sc.nextInt(); //the rangeClosed() method returns a sequential IntStream for the specified range of int elements //for-each iterate over the Stream and prints the elements IntStream.rangeClosed(1, num).mapToObj(i->i%3==0?(i%5==0? 'FizzBuzz ':'Fizz '):(i%5==0? 'Buzz ': i+' ')).forEach(System.out::print); //close the Scanner sc.close(); } } Izhod:
Enter the number: 40 1 2 Fizz 4 Buzz Fizz 7 8 Fizz Buzz 11 Fizz 13 14 FizzBuzz 16 17 Fizz 19 Buzz Fizz 22 23 Fizz Buzz 26 Fizz 28 29 FizzBuzz 31 32 Fizz 34 Buzz Fizz 37 38 Fizz Buzz
Upoštevajte, da je v zgornjem programu logika za FizzBuzz prilagojena v eno vrstico z uporabo ternarni operater . Zmanjša vrstico kode. Natisnili smo Fizz če je število večkratnik 3, natisne Buzz če je število večkratnik 5, natisne FizzBuzz če je število večkratnik 3 in 5, drugače natisne število sama.