BCS2233 OOP. LAB Array and GUI

1. Read ten numbers, compute their average, and find out how many numbers are above the average.

Answers
import java.util.Scanner;
public class demoArray1 {
   
    public static void main(String[] args) {
    Scanner input = new Scanner(System.in);   
        double[] arrayNum = new double[10];
        int i,moreThanAvg;
        double num,sum,avg;
        sum=0;
        moreThanAvg=0;
        System.out.println("Input 10 Numbers ");
        for(i=0;i<=9;i++){
            num= input.nextDouble();
            arrayNum[i]=num;
            sum = sum +num;
        }
        avg=sum/10;
        System.out.println("Sum of 10 numbers ="+sum);
        System.out.println("Average of 10 numbers="+avg);   
   
           for(i=0;i<=9;i++){
           if (arrayNum[i]>avg)
               moreThanAvg++;
            }
           System.out.println("Total of number above average ="+moreThanAvg);
        }
}



2. Write a program statement that will do the following of array N as shown below:-

int[] arrayN = new int[10];
for(i=0;i<=9;i++){
             arrayN[i]=i+1;
             }

i)  Print first element.
ii) Print last element.
iii) Print all elements (use loop).
iv)  Replace third element with 5.
v) Replace last element with 100;
vi) Copy the elements in the fifth location into the first one.
vii) Increase the sixth element by 10.
viii) Decrease the second element by 1;
ix) Sum and print all elements.
x) Print only odd element(s).


3. Show output of the following java program.

import javafx.application.Application;
import javafx.scene.Scene;
import javafx.scene.control.Button;
import javafx.stage.Stage;

public class MyJavaFX extends Application {
  @Override // Override the start method in the Application class
  public void start(Stage primaryStage) {
    // Create a button and place it in the scene
 
    Button btOK = new Button("OK");
    Scene scene = new Scene(btOK, 200, 300);
    primaryStage.setTitle("My First GUI"); // Set the stage title
    primaryStage.setScene(scene); // Place the scene in the stage
    primaryStage.show(); // Display the stage
  }
 
    public static void main(String[] args) {
    launch();
  }
}

4. Write a java program to print the following output: