enum samples for bael6145 implementing toString() for enums (#13407)

* enum samples for bael6145 implementing toString() for enums

* updates from code review:
FastFood1: return empty string instead of null when no matching enum found
FastFood3: make enum name variable final

* make member variable private final in FastFoot3 enum
remove trailing comma in FastFoot2 enum

core-java-modules/core-java-lang-oop-types-2/src/main/java/com/baeldung/enumtostring/FastFood1.java

@@ -0,0 +1,25 @@
+package com.baeldung.enumtostring;
+
+public enum FastFood1 {
+    PIZZA,
+    BURGER,
+    TACO,
+    CHICKEN,
+    ;
+
+    @Override
+    public String toString() {
+        switch (this) {
+        case PIZZA:
+            return "Pizza Pie";
+        case BURGER:
+            return "Cheese Burger";
+        case TACO:
+            return "Crunchy Taco";
+        case CHICKEN:
+            return "Fried Chicken";
+        default:
+            return "";
+        }
+    }
+}

core-java-modules/core-java-lang-oop-types-2/src/main/java/com/baeldung/enumtostring/FastFood2.java

@@ -0,0 +1,28 @@
+package com.baeldung.enumtostring;
+
+public enum FastFood2 {
+    PIZZA {
+        @Override
+        public String toString() {
+            return "Pizza Pie";
+        }
+    },
+    BURGER {
+        @Override
+        public String toString() {
+            return "Cheese Burger";
+        }
+    },
+    TACO {
+        @Override
+        public String toString() {
+            return "Crunchy Taco";
+        }
+    },
+    CHICKEN {
+        @Override
+        public String toString() {
+            return "Fried Chicken";
+        }
+    }
+}

core-java-modules/core-java-lang-oop-types-2/src/main/java/com/baeldung/enumtostring/FastFood3.java

@@ -0,0 +1,29 @@
+package com.baeldung.enumtostring;
+
+public enum FastFood3 {
+    PIZZA("Pizza Pie"),
+    BURGER("Cheese Burger"),
+    TACO("Crunchy Taco"),
+    CHICKEN("Fried Chicken"),
+    ;
+
+    private final String prettyName;
+
+    FastFood3(String prettyName) {
+        this.prettyName = prettyName;
+    }
+
+    FastFood3 fromString(String prettyName) {
+        for (FastFood3 f : values()) {
+            if (f.prettyName.equals(prettyName)) {
+                return f;
+            }
+        }
+        return null;
+    }
+
+    @Override
+    public String toString() {
+        return prettyName;
+    }
+}