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/**

* Copyright (c) 2024 Araf Karsh Hamid

* Permission is hereby granted, free of charge, to any person obtaining a copy

* of this software and associated documentation files (the "Software"), to deal

* in the Software without restriction, including without limitation the rights

* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell

* copies of the Software, and to permit persons to whom the Software is

* furnished to do so, subject to the following conditions:

* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR

* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,

* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE

* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER

* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,

* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN

* THE SOFTWARE.

* This program and the accompanying materials are dual-licensed under

* either the terms of the Eclipse Public License v1.0 as published by

* the Eclipse Foundation

* or (per the licensee's choosing)

* under the terms of the Apache 2 License version 2.0

* as published by the Apache Software Foundation.

*/

package java14;

import java05.annotations.SourceCodeAuthorMethod;

import java.sql.SQLOutput;

/**

* Java 14 Example

* Switch Expression Example

*

* @author: Araf Karsh Hamid

* @version:

* @date:

*/

public class SwitchExpressionExample {

public static void main (String[] args) {

// Java 14

System.out.println("JAVA 14 >>>>>--------------------------------------------------------");

System.out.println("Simple Switch Expressions - No Fall Through");

System.out.println("< Day of the Week Old Model = "+switchOldModel(3));

System.out.println("> Day of the Week New Model = "+switchNewModel(3));

System.out.println("Complex Switch Expressions - No Fall Through");

System.out.println("< Day of the Week Old Model = "+switchOldModel(6));

System.out.println("> Day of the Week New Model = "+switchNewModel(6));

System.out.println("> Type of the Day. Monday = "+switchNewModel2("Monday"));

System.out.println("> Type of the Day. Sunday = "+switchNewModel2("Sunday"));

}

/**

* Old Model of Switch Statement

* @param day

* @return

*/

public static String switchOldModel(int day) {

String dayOfTheWeek = "Undefined";

switch(day) {

case 0: dayOfTheWeek = "Monday"; break;

case 1: dayOfTheWeek = "Tuesday"; break;

case 2: dayOfTheWeek = "Wednesday"; break;

case 3: dayOfTheWeek = "Thursday"; break;

case 4: dayOfTheWeek = "Friday"; break;

case 5: dayOfTheWeek = "Saturday"; break;

case 6:

System.out.println("Even God took Rest on Sunday!");

dayOfTheWeek = "Sunday";

break;

default: throw new RuntimeException("Illegal Day of the Week argument! >> "+day);

}

return dayOfTheWeek;

}

/**

* Switch Expressions

* No Fall Through like in the old model if breaks are missing.

* @param day

* @return

*/

public static String switchNewModel(int day) {

return switch(day) {

case 0 -> "Monday";

case 1 -> "Tuesday";

case 2 -> "Wednesday";

case 3 -> "Thursday";

case 4 -> "Friday";

case 5 -> "Saturday";

case 6 -> {

System.out.println("Even God took Rest on Sunday!");

yield "Sunday";

}

default -> throw new RuntimeException("Illegal Day of the Week argument! >> "+day);

};

}

public static String switchNewModel2(String day) {

// Using switch expression in Java 21

return switch (day.toUpperCase()) {

case "MONDAY", "TUESDAY", "WEDNESDAY", "THURSDAY", "FRIDAY" -> "Weekday";

case "SATURDAY", "SUNDAY" -> "Weekend";

default -> throw new IllegalArgumentException("Invalid day: " + day);

};

}

}