Question

Take the following code and add a joption pane to make it eaiser to read. Can anyone tell me whats wrong with my code? It wont compile JAVA. import java.util.Scanner; import java.util.Queue; import java.util.LinkedList; class que { public static void main(String args[]) { int count=0,min=0,hr=0; String a; Scanner inp=new Scanner(System.in); Queue q=new LinkedList<>(); while(count<10) { System.out.println("Enter your name:"); a=inp.nextLine(); q.add(a); count=count+1; min=min+5; if(min>=60) { hr=hr+1; } System.out.println("You are "+count+" in the queue"); System.out.println("Average wait time is "+hr+" hours and "+min+" min"); } } }

Answer 1

Specify the type parameter of the Queue as Queue<String> to avoid the warnings and do not forget to close the scanner.

/******************************************que.java*********************************************/

import java.util.Scanner;

import javax.swing.JFrame;
import javax.swing.JOptionPane;

import java.util.Queue;
import java.util.LinkedList;

class que {
   public static void main(String args[]) {
       int count = 0, min = 0, hr = 0;
       String a;
       Scanner inp = new Scanner(System.in);
       // Specify parameter type for the queue to avoid warnings
       Queue<String> q = new LinkedList<>();
       // create a new frame
       JFrame frame = new JFrame();
       while (count < 10) {
           System.out.println("Enter your name:");
           a = inp.nextLine();
           q.add(a);
           count = count + 1;
           min = min + 5;
           if (min >= 60) {
               hr = hr + 1;
           }
           // System.out.println("You are " + count + " in the queue");
           // System.out.println("Average wait time is " + hr + " hours and " + min + "min");
           // show the message on the JoptionPane
           JOptionPane.showMessageDialog(frame, "You are " + count + " in the queue" + "\nAverage wait time is " + hr
                   + " hours and " + min + " min");
       }
       // do not forget to close the scanner
       inp.close();
   }
}
/*******************************output*******************************/

Please let me know if you have any problem or modify the answer, Thanks :)