class 20 chaining

Author: MartinFiorde

modules/src/main/java/com/platzi/functional_student_practice/_10_chaining/C20Chaining.java

@@ -0,0 +1,37 @@
+package com.platzi.functional_student_practice._10_chaining;
+
+
+public class C20Chaining {
+    public static void main(String[] args) {
+        System.out.println("////////////////////////////////////////////////////////////////////////////////////");
+        System.out.println("\nCLASS 20\n");
+
+        // 1. Every .append() method returns "this" object with the changes updated in state.
+        StringBuilder stringBuilder = new StringBuilder();
+        stringBuilder.append("Hola ")
+                .append("alumno")
+                .append("!")
+                .reverse()
+                .append(" :iztalP")
+                .reverse();
+        System.out.println(stringBuilder);
+
+        // 2. Custom example. This is usefull with FUNCTION COMPOSITION
+        Chainer chainer = new Chainer();
+        Chainer chainer2 = chainer.sayHi();
+        Chainer chainer3 = chainer2.sayBye();
+        chainer3.sayHi().sayBye();
+    }
+
+    private static class Chainer {
+        public Chainer sayHi() {
+            System.out.println("Hola");
+            return this;
+        }
+
+        public Chainer sayBye() {
+            System.out.println("Bye");
+            return this;
+        }
+    }
+}