Pemacu menu JAVA untuk menyemak sama ada aksara ialah rentetan, nombor atau aksara khas

Dalam artikel ini, kita akan melihat pemacu menu dilaksanakan menggunakan bahasa pengaturcaraan Java untuk menyemak sama ada aksara yang dimasukkan ialah nombor, rentetan atau aksara khas. Kami akan menggunakan suis case untuk melaksanakan aplikasi ini.

Tunjukkan kepada anda beberapa contoh

Contoh-1

Suppose the entered character is ‘a’ then the output should be “Entered character is a String”.

Terjemahan bahasa Cina bagi

Instance-2

ialah:

Contoh-2

Suppose the entered character is ‘1’ then the output should be “Entered character is a number”.

Terjemahan bahasa Cina bagi

Instance-3

ialah:

Contoh-3

Suppose the entered character is ‘$’ then the output should be “Entered character is a Special character”.

tatabahasa

Di Java, kami menggunakan fungsi isLetter, isDigit atau isWhitespace untuk menyemak sama ada aksara ialah rentetan, nombor atau aksara khas. Gunakan fungsi isLetter untuk menyemak rentetan, fungsi isDigit untuk menyemak nombor dan gabungan fungsi isLetter, isDigit dan isWhitespace untuk menyemak aksara khas.

Berikut ialah sintaks fungsi rentetan

Character.isLetter(ob1)

Berikut ialah sintaks fungsi berangka

Character.isDigit(ob1)

Berikut ialah sintaks fungsi rentetan

(!Character.isDigit(ob1)&& !Character.isLetter(ob1)&& !Character.isWhitespace(ob1))

Algoritma

Langkah-1 − Minta pengguna memasukkan aksara yang diperlukan.

Langkah 2 - Tunjukkan menu.

Langkah 3 - Minta pengguna memasukkan pilihan mereka.

Langkah-4 - Gunakan kotak suis untuk pergi ke pemilihan dan lakukan tindakan.

Langkah 5 - Cetak hasilnya.

Mari lihat program untuk memahaminya dengan jelas.

Contoh

import java.util.*;
public class Main {
   public static void main(String args[]) {
      Scanner sc = new Scanner( System.in );
      System.out.println("Enter a character to check if it's a Number, String or a Special character");
      char ob1 = sc.next().charAt(0);

      System.out.println("Now choose the operation you want to perform from the menu given below. ");

      mainLoop: while (true) {
         Scanner inn = new Scanner( System.in );
         System.out.println("\n***Menu***");
         System.out.println("1. Check if a character is number");
         System.out.println("2. Check if a character is String");
         System.out.println("3. Check if a character is Special character");
         System.out.println("4. Terminate the program");
         System.out.println("Enter action number (1-4): ");
         int command;
         if ( inn.hasNextInt() ) {
            command = inn.nextInt();
            inn.nextLine();
         }
         else {
            System.out.println("\nILLEGAL RESPONSE. YOU MUST ENTER A NUMBER.");
            inn.nextLine();
            continue;
         }
         switch(command) {
            case 1:
            if (Character.isDigit(ob1)) {
               System.out.println("Character is a number!");
            } else {
               System.out.println("Character is not a number!");
            }
            break;
            case 2:
            if (Character.isLetter(ob1)) {
               System.out.println("Character is a String!");
            } else {
               System.out.println("Character is not a String!");
            }
            break;
            case 3:
            if (!Character.isDigit(ob1)
            && !Character.isLetter(ob1)
            && !Character.isWhitespace(ob1)) {
               System.out.println("Character is a Special Character!");
            } else {
               System.out.println("Character is not a Special Character!");
            }
            break;
            case 4:
            System.out.println("Program terminated");
            break mainLoop;
            default:
            System.out.println("Wrong choice!!");
         }

      }

   }
}

Output

Enter a character to check if it's a Number, String or a Special character
t
Now choose the operation you want to perform from the menu given below.
***Menu***
1. Check if a character is number
2. Check if a character is String
3. Check if a character is Special character
4. Terminate the program
Enter action number (1-4):
1
Character is not a number!
***Menu***
1. Check if a character is number
2. Check if a character is String
3. Check if a character is Special character
4. Terminate the program
Enter action number (1-4):
3
Character is not a Special Character!
***Menu***
1. Check if a character is number
2. Check if a character is String
3. Check if a character is Special character
4. Terminate the program
Enter action number (1-4):
2
Character is a String!
***Menu***
1. Check if a character is number
2. Check if a character is String
3. Check if a character is Special character
4. Terminate the program
Enter action number (1-4):
$
ILLEGAL RESPONSE. YOU MUST ENTER A NUMBER.
***Menu***
1. Check if a character is number
2. Check if a character is String
3. Check if a character is Special character
4. Terminate the program
Enter action number (1-4):
1
Character is not a number!
***Menu***
1. Check if a character is number
2. Check if a character is String
3. Check if a character is Special character
4. Terminate the program
Enter action number (1-4):
3
Character is not a Special Character!
***Menu***
1. Check if a character is number
2. Check if a character is String
3. Check if a character is Special character
4. Terminate the program
Enter action number (1-4):
2
Character is a String!
***Menu***
1. Check if a character is number
2. Check if a character is String
3. Check if a character is Special character
4. Terminate the program
Enter action number (1-4):
4
Program terminated

Dalam artikel ini, kami meneroka cara menyemak sama ada aksara ialah rentetan, nombor atau aksara khas dalam Java dengan menggunakan pendekatan dipacu menu.

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