Personal Greeting

Back to the Program-A-Day homepage

Problem Write a Java program PersonalGreeting, that asks a series of questions and returns a response. For all input and output use JOptionPane to help review the first chapter's material. Your program should do the following: prompt the user for their name prompt the user for their age output a greeting message that displays both name and age gathered from the input This program will cover the following topics: input and output using JOptionPane Commnets String introduction to ints Example: If a user inputs "Elmo" for their name and "10" for their age, then the result would look something like "Welcome to COMP 1010 Elmo, you are 10 years old today."		Mid-term Review
Solution Start by importing the swing java package. We need this to make calls to the JOptionPane class. import javax.swing.*; Define your variables, we will need a String for your name and an int for age. //local variables String name; int age; Next, start by capturing the user input using JOptionPane.showInputDialog. We will need to use Integer.parseInt to cast the string result to an integer for the user's age. Note: To avoid confusion, we will assume users will enter valid input. An unfortunate disadvantage to Integer.parseInt is that if the user enters non numeric values the program will throw an error. You may wish to make the program more robust if you like. In a future computer science course you will learn how to handle such situations. //input name = JOptionPane.showInputDialog("Please enter your name") ; age = Integer.parseInt(JOptionPane.showInputDialog("Please enter your age")); Now output your message using JOptionPage.showMessageDialog. Make sure first parameter is null. Don't forget to use the + operator when appending strings (sometimes referred to as concatenation). //output JOptionPane.showMessageDialog(null, "Welcome to COMP1010 " + name + ", you are " + age + " years old today.");
Code Solution Code import javax.swing.*; public class PersonalGreeting { public static void main(String[] args) { //local variables String name; int age; //input name = JOptionPane.showInputDialog("Please enter your name") ; age = Integer.parseInt(JOptionPane.showInputDialog("Please enter your age")); //output JOptionPane.showMessageDialog(null, "Welcome to COMP1010 " + name + ", you are " + age + " years old today."); } }

Back to the Program-A-Day homepage