Question

Java programming

Create a application with a method void (after main() ) that creates an array and asks for the user fill it with float numbers.
This array have infinite elements until the user decide that it is enough and input a command to stop.

Display this array's elements data in another method void.

Thanks for your help!

Answer 1

The below code will do your requirements. Note that, when the code ask you for Do you want to enter array element? Enter 1(if yes) Enter 0(if no): you must respond with an integer else the program will raise an exception. If you enter a integer not(0/1) then an error message is displayed and ask you to eneter correct option. See the code below for better understanding:

import java.util.Scanner;  
public class MyClass {
    //function to display array
    public static void disparray(float[] a, int n){
        int i; //for loop through array elements
        System.out.println("Array elements are: ");       //printing message that array elements are printing below
        //for loop to displaying array elements 
        for(i=0;i<n;i++)
            System.out.println(a[i]);       //displaying each array elements
    }
    
    //function to input array
    public static void inputarray(){
        //creating scanner object
        Scanner sc = new Scanner(System.in);
        float[] a = new float[100]; //initializing a floating array
        int f = 1; //variable to store flag
        int i=0; //variable to loop arrray elements
        
        //loop for getting array elements
        do{
            //asking user whether to eneter element or not user must respond with a integer(entry message)
            System.out.println("Do you want to enter array element? Enter 1(if yes) Enter 0(if no): ");
            
            //getting user response
            f=sc.nextInt();
            
            //cheking user response
            if(f==1){                                           //if user response is 1
                System.out.println("Enter array element: ");     //message to enter array element
                a[i] = sc.nextFloat();                          //getting array element
                i++;                                            //incrementing array index
            }
            else if(f==0)                                       //if user response is 0           
                System.out.println("Array entry stopped!");         //showing message for stopping entry
            else{                                                        //if user response is a integer but neither 0 or 1
                System.out.println("ERROR: Enter the correct option");         //showing to enter the correct option
                f=1;                    //setting flag to 1 (for asking the entry message)
            }
        }while(f==1);            //continue loop when user response is 1
        //calling function to print array with the entered index
        disparray(a, i);
    }
    public static void main(String args[]) {
      
      //calling the method to insert array
      inputarray();
    }
}

Sample OUTPUT: