JEP 361: Switch Expressions (Standard)

Author: ibrahimatay

README.md

@@ -41,7 +41,8 @@ This repository contains Java examples that are designed to track and document t
   * [JEP 395](java-16/src/main/java/com/ibrahimatay/JEP395Records.java): Records
 
 * [Java 14](java-14/) (March, 2020)
-
+  * [JEP 361](java-14/src/main/java/com/ibrahimatay/JEP361SwitchExpressions.java): Switch Expressions
+  
 * [Java 12](java-12/) (March, 2019)
   * API Improvements
     * [Compact Number Formatting](java-12/src/main/java/com/ibrahimatay/CompactNumberFormatting.java)

java-14/src/main/java/com/ibrahimatay/JEP361SwitchExpressions.java

@@ -0,0 +1,43 @@
+package com.ibrahimatay;
+
+public class JEP361SwitchExpressions {
+    public static void main(String[] args) {
+        // Switch Expressions (JEP 361)
+        // https://javaalmanac.io/features/switch/
+
+        // JEP 361: Switch Expressions
+        // https://openjdk.org/jeps/361
+
+        System.out.printf("%1$s HTTP status code refers to a %2$s%n", 100, getHTTPCodeDesc(100));
+        System.out.printf("%1$s HTTP status code refers to a %2$s%n", 200, getHTTPCodeDesc(200));
+        System.out.printf("%1$s HTTP status code refers to a %2$s%n", 403, getHTTPCodeDesc(403));
+        System.out.printf("%1$s HTTP status code refers to a %2$s%n", 0, getHTTPCodeDesc(0));
+
+        /*
+        100 HTTP status code refers to a Continue
+        200 HTTP status code refers to a OK
+        403 HTTP status code refers to a Client Error
+        0 HTTP status code refers to a Unknown error
+        */
+    }
+
+    public static String getHTTPCodeDesc(int code){
+        return switch(code) {
+            case 100 -> "Continue";
+            case 200 -> "OK";
+            case 301 -> "Moved Permanently";
+            case 302 -> "Found";
+            case 400 -> "Bad Request";
+            case 500 -> "Internal Server Error";
+            case 502 -> "Bad Gateway";
+            default                            -> {
+                if(code > 100 && code < 200 ) yield "Informational";
+                if(code > 200 && code < 300) yield "Successful";
+                if(code > 302 && code < 400) yield "Redirection";
+                if(code > 400 && code < 500) yield "Client Error";
+                if(code > 502 && code < 600 ) yield "Server Error";
+                yield "Unknown error";
+            }
+        };
+    }
+}