Merge branch 'main' into add-approach-bob

Author: jagdish-15

.github/workflows/java.yml

@@ -17,7 +17,7 @@ jobs:
     steps:
       - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683
       - name: Set up JDK 1.17
-        uses: actions/setup-java@8df1039502a15bceb9433410b1a100fbe190c53b
+        uses: actions/setup-java@7a6d8a8234af8eb26422e24e3006232cccaa061b
         with:
           java-version: 17
           distribution: "temurin"
@@ -31,7 +31,7 @@ jobs:
     steps:
       - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683
       - name: Set up JDK 1.17
-        uses: actions/setup-java@8df1039502a15bceb9433410b1a100fbe190c53b
+        uses: actions/setup-java@7a6d8a8234af8eb26422e24e3006232cccaa061b
         with:
           java-version: 17
           distribution: "temurin"
@@ -47,7 +47,7 @@ jobs:
       - name: Test all exercises using java-test-runner
         run: bin/test-with-test-runner
       - name: Archive test results
-        uses: actions/upload-artifact@b4b15b8c7c6ac21ea08fcf65892d2ee8f75cf882
+        uses: actions/upload-artifact@6f51ac03b9356f520e9adb1b1b7802705f340c2b
         with:
           name: test-results
           path: exercises/**/build/results.json

.github/workflows/markdown.yml

@@ -19,4 +19,4 @@ jobs:
     steps:
       - uses: actions/checkout@11bd71901bbe5b1630ceea73d27597364c9af683
       - name: Lint markdown
-        uses: DavidAnson/markdownlint-cli2-action@eb5ca3ab411449c66620fe7f1b3c9e10547144b0
+        uses: DavidAnson/markdownlint-cli2-action@a23dae216ce3fee4db69da41fed90d2a4af801cf

concepts/switch-statement/.meta/config.json

@@ -4,5 +4,6 @@
     "Azumix"
   ],
   "contributors": [
+    "josealonso"
   ]
 }

concepts/switch-statement/about.md

@@ -147,7 +147,23 @@ Starting with Java 14 (available as a preview before in Java 12 and 13) it is po
 
 You can find more information on enhanced switch [here][switch1], [here][switch2] and on the [oracle documentation][oracle-doc].
 
+In addition, a feature called `Guarded Patterns` was added in Java 21, which allows you to do checks in the case label itself.
+
+```java
+String dayOfMonth = getDayOfMonth();
+String day = "";
+return switch (day) {
+    case "Tuesday" when dayOfMonth == 13 -> "Forbidden day!!";
+    case "Monday", "Tuesday", "Wednesday", "Thursday", "Friday" -> "Week day";
+    case "Saturday", "Sunday" -> "Weekend";
+    default -> "Unknown";
+};
+```
+
+You can find more information on the switch expression on Java 21 [here][switch-on-Java-21]
+
 [yield-keyword]: https://www.codejava.net/java-core/the-java-language/yield-keyword-in-java
 [switch1]: https://www.vojtechruzicka.com/java-enhanced-switch/
 [switch2]: https://howtodoinjava.com/java14/switch-expressions/
 [oracle-doc]: https://docs.oracle.com/en/java/javase/13/language/switch-expressions.html
+[switch-on-Java-21]: https://blog.adamgamboa.dev/switch-expression-on-java-21/#3-guarded-pattern

concepts/switch-statement/links.json

@@ -14,5 +14,9 @@
   {
     "url": "https://docs.oracle.com/javase/tutorial/java/nutsandbolts/switch.html",
     "description": "oracle-doc"
+  },
+  {
+    "url": "https://blog.adamgamboa.dev/switch-expression-on-java-21/#3-guarded-pattern",
+    "description": "switch-on-Java-21"
   }
 ]

exercises/concept/calculator-conundrum/.meta/config.json

@@ -4,6 +4,7 @@
     "jmrunkle"
   ],
   "contributors": [
+    "jagdish-15",
     "sanderploegsma"
   ],
   "files": {

exercises/concept/calculator-conundrum/.meta/src/reference/java/IllegalOperationException.java

@@ -0,0 +1,9 @@
+public class IllegalOperationException extends RuntimeException {
+    public IllegalOperationException(String errorMessage) {
+        super(errorMessage);
+    }
+
+    public IllegalOperationException(String errorMessage, Throwable cause) {
+        super(errorMessage, cause);
+    }
+}

exercises/concept/calculator-conundrum/.meta/src/reference/java/IllegalOperationException.java

@@ -3,6 +3,7 @@
     "sougat818"
   ],
   "contributors": [
+    "jagdish-15",
     "sanderploegsma"
   ],
   "files": {