Console Input

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ConsoleInput1.java

/******************************************************************************
 * This program demonstrates how to prompt the user for input.
 * 
 * Copyright © 2020 Richard Lesh.  All rights reserved.
 *****************************************************************************/

import org.pureprogrammer.Utils;

public class ConsoleInput1 {

	public static void main(String[] args) {
		final String NAME = Utils.prompt("What is your name? ");
		final String FAVORITE_COLOR = Utils.prompt("What is your favorite color? ");
		System.out.println(Utils.format("Hello, {0:s}!  I like {1:s} too!", NAME, FAVORITE_COLOR));
	}
}

ConsoleInput2.java

/******************************************************************************
 * This program demonstrates how to prompt the user for input.
 * 
 * Copyright © 2020 Richard Lesh.  All rights reserved.
 *****************************************************************************/

import org.pureprogrammer.Utils;

public class ConsoleInput2 {

	public static void main(String[] args) {
		int favoriteInt = 0;
		long favoriteLong = 0;
		double favoriteDouble = 0.0;
		try {
			final String FAVORITE_INT_INPUT = Utils.prompt("What is your favorite small integer? ");
			favoriteInt = Integer.parseInt(FAVORITE_INT_INPUT);
			final String FAVORITE_LONG_INPUT = Utils.prompt("What is your favorite large integer? ");
			favoriteLong = Long.parseLong(FAVORITE_LONG_INPUT);
			final String FAVORITE_DOUBLE_INPUT = Utils.prompt("What is your favorite floating point? ");
			favoriteDouble = Double.parseDouble(FAVORITE_DOUBLE_INPUT);
		} catch (NumberFormatException ex) {
			System.out.println(Utils.join("", "Bad input! ", Utils.exceptionMessage(ex)));
		} catch (Exception ex) {
			System.out.println("Don't know what went wrong!");
		}
		final double SUM = favoriteInt + favoriteLong + favoriteDouble;
		System.out.println(Utils.format("All together they add up to {0:f}!", SUM));
	}
}

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References

• [[Java Language Specification]], Java SE 17 Edition, Gosling, et. al., 2021.
• [[Java Tutorials]]
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