Pemacu menu Java untuk menyemak jenis angka

byte: Range -128 to 127 (Size 1 byte)
short: Range -32,768 to 32,767 (Size 2 bytes)
int: Range -2,147,483,648 to 2,147,483,647 (Size 4 bytes)
long: Range -9,223,372,036,854,775,808 to 9,223,372,036,854,775,807 (8 bytes)
float: Range 6 to 7 decimal digits for Fractional Numbers (Size 4 bytes)
double: Range 15 decimal digits for Fractional Numbers (Size 8 bytes)

Suppose we have taken an integer type of value i.e. 222222 then it must show “number entered is a valid integer”.

Suppose we have taken a double type of value i.e 120.0 then it must show “number entered is a valid double”.

Suppose we have taken a float type of value i.e 2.1 then it must show “number entered is a valid float”.

Suppose we have taken a byte type of value i.e 23 then it must show “number entered is a valid byte”.

Suppose we have taken a short type of value i.e 32,765 then it must show “number entered is a valid short”.

Suppose we have taken a long type of value i.e 222222222222 then it must show “number entered is a valid long”.

hasNextInt()

hasNextDouble()

hasNextFloat()

hasNextByte()

hasNextShort()

hasNextLong()

import java.util.*;
public class Main{
   public static void main(String args[]){
      mainLoop: while (true) {
         Scanner sc = new Scanner( System.in );
         System.out.println("\n***Menu***");
         System.out.println("1. Check for Integer");
         System.out.println("2. Check for Double");
         System.out.println("3. Check for Float");
         System.out.println("4. Check for Byte");
         System.out.println("5. Check for Short");
         System.out.println("6. Check for Long");
         System.out.println("7. Terminate the program");
         System.out.println("Enter action number (1-7): ");
         int command = sc.nextInt();
         switch(command) {
            case 1:
            int input = 0;
            System.out.println("Enter an integer for its validation");
            if(sc.hasNextInt()) {
               input = sc.nextInt();
               System.out.println(input+" is a valid Integer");
            }
            else{
               System.out.println("It is not a valid Integer");
            }
            break;
            case 2:
            double input1 = 0;
            System.out.println("Enter a Double for its validation");
            if(sc.hasNextDouble()) {
               input1 = sc.nextDouble();
               System.out.println(input1+" is a valid Double");
            }
            else {
               System.out.println("It is not a valid Double");
            }
            break;
            case 3:
            float input2;
            System.out.println("Enter a Float for its validation");
            if(sc.hasNextFloat()) {
               input2 = sc.nextFloat();
               System.out.println(input2+" is a valid Float");
            }
            else{
               System.out.println("It is not a valid Float");
            }
            break;
            case 4:
            byte input3 = 0;
            System.out.println("Enter a Byte for its validation");
            if(sc.hasNextByte()) {
               input3 = sc.nextByte();
               System.out.println(input3+" is a valid Byte");
            }
            else{
               System.out.println("It is not a valid Byte");
            }
            break;
            case 5:
            short input4 = 0;
            System.out.println("Enter a Short for its validation");
            if(sc.hasNextShort()) {
               input4 = sc.nextShort();
               System.out.println(input4+" is a valid Short");
            }
            else{
               System.out.println("It is not a valid Short");
            }

            break;
            case 6:
            long input5 = 0;
               System.out.println("Enter a Short for its validation");
               if(sc.hasNextLong()) {
                  input5 = sc.nextLong();
                  System.out.println(input5+" is a valid Long");
               }
               else{
                  System.out.println("It is not a valid Long");
               }
               break;
               case 7:
               System.out.println("Program terminated");
               break mainLoop;
               default:
               System.out.println("Wrong choice!!");
         }
      }
   }
}

***Menu***
1. Check for Integer
2. Check for Double
3. Check for Float
4. Check for Byte
5. Check for Short
6. Check for Long
7. Terminate the program
Enter action number (1-7):
1
Enter an integer for its validation
22222
22222 is a valid Integer

***Menu***
1. Check for Integer
2. Check for Double
3. Check for Float
4. Check for Byte
5. Check for Short
6. Check for Long
7. Terminate the program
Enter action number (1-7):
2
Enter a Double for its validation
2.4
2.4 is a valid Double

***Menu***
1. Check for Integer
2. Check for Double
3. Check for Float
4. Check for Byte
5. Check for Short
6. Check for Long
7. Terminate the program
Enter action number (1-7):
3
Enter a Float for its validation
2.5
2.5 is a valid Float

***Menu***
1. Check for Integer
2. Check for Double
3. Check for Float
4. Check for Byte
5. Check for Short
6. Check for Long
7. Terminate the program
Enter action number (1-7):
4
Enter a Byte for its validation
123
123 is a valid Byte

***Menu***
1. Check for Integer
2. Check for Double
3. Check for Float
4. Check for Byte
5. Check for Short
6. Check for Long
7. Terminate the program
Enter action number (1-7):
5
Enter a Short for its validation
1234
1234 is a valid Short

***Menu***
1. Check for Integer
2. Check for Double
3. Check for Float
4. Check for Byte
5. Check for Short
6. Check for Long
7. Terminate the program
Enter action number (1-7):
6
Enter a Short for its validation
345
345 is a valid Long

***Menu***
1. Check for Integer
2. Check for Double
3. Check for Float
4. Check for Byte
5. Check for Short
6. Check for Long
7. Terminate the program
Enter action number (1-7):
7
Program terminated