Challenge 44.

JavaZakariae · JavaZakariae · commit 30c830537a7b · 2019-11-17T19:50:10.000+01:00
Predicate&lt;String&gt;, and, or, negate.
diff --git a/src/main/java/challenge41_50/Challenge_44.java b/src/main/java/challenge41_50/Challenge_44.java
@@ -0,0 +1,34 @@
+package challenge41_50;
+
+import java.util.function.Predicate;
+
+/**
+ *  String
+ *  Predicate<String>
+ *      and, or, negate ---> default implementation in the interface.
+ *      boolean test(String s) should be overridden.
+ */
+public class Challenge_44 {
+    public static void main( String[] args ) {
+        var newSlay = "---";
+        var jamesShot = "---";
+
+        final Predicate<String> pyramidHeadAttack = new Predicate<String>() {
+            @Override
+            public boolean test( String s ) {
+                return newSlay == new String(s).intern();
+            }                                  //true
+        }.and(new PyramidHead())               //&& false
+         .or(james->james.equals(jamesShot))   //||true
+         .negate();                             //!true--> false
+        System.out.println(pyramidHeadAttack.test("---"));
+
+    }
+
+    static class PyramidHead implements Predicate<String> {
+        @Override
+        public boolean test( String s ) {
+            return s.equals("--!");
+        }
+    }
+}
