第9章示例代码

Author: ipofss

src/main/java/com/wbs/java8lambda/chapter8/Peek.java

@@ -21,5 +21,7 @@ public static void main(String[] args) {
                 .limit(3)
                 .peek(x -> System.out.println("after limit:" + x))
                 .collect(Collectors.toList());
+
+        System.out.println(result);
     }
 }

src/main/java/com/wbs/java8lambda/chapter9/Ambiguous.java

@@ -0,0 +1,32 @@
+package com.wbs.java8lambda.chapter9;
+
+/**
+ * TODO
+ *
+ * @author: wangbingshuai
+ * @create: 2019-11-07 20:14
+ **/
+public class Ambiguous {
+    public static void main(String[] args) {
+        new C().hello();
+    }
+
+    private interface A {
+        default void hello() {
+            System.out.println("Hello from A");
+        }
+    }
+
+    private interface B {
+        default void hello() {
+            System.out.println("Hello from B");
+        }
+    }
+
+    private static class C implements B, A {
+        @Override
+        public void hello() {
+            A.super.hello();
+        }
+    }
+}

src/main/java/com/wbs/java8lambda/chapter9/Diamond.java

@@ -0,0 +1,29 @@
+package com.wbs.java8lambda.chapter9;
+
+/**
+ * TODO
+ *
+ * @author: wangbingshuai
+ * @create: 2019-11-07 20:19
+ **/
+public class Diamond {
+    public static void main(String[] args) {
+        new D().hello();
+    }
+
+    private interface A {
+        default void hello() {
+            System.out.println("Hello from A");
+        }
+    }
+
+    private interface B extends A {
+    }
+
+    private interface C extends A {
+    }
+
+    static class D implements B, C {
+
+    }
+}

src/main/java/com/wbs/java8lambda/chapter9/Intro.java

@@ -0,0 +1,19 @@
+package com.wbs.java8lambda.chapter9;
+
+import java.util.Arrays;
+import java.util.Comparator;
+import java.util.List;
+
+/**
+ * TODO
+ *
+ * @author: wangbingshuai
+ * @create: 2019-11-08 14:49
+ **/
+public class Intro {
+    public static void main(String[] args) {
+        List<Integer> numbers = Arrays.asList(3, 5, 1, 2, 6);
+        numbers.sort(Comparator.naturalOrder());
+        System.out.println(numbers);
+    }
+}

src/main/java/com/wbs/java8lambda/chapter9/Letter.java

@@ -0,0 +1,29 @@
+package com.wbs.java8lambda.chapter9;
+
+import java.util.function.Function;
+
+/**
+ * TODO
+ *
+ * @author: wangbingshuai
+ * @create: 2019-11-07 20:26
+ **/
+public class Letter {
+    public static void main(String[] args) {
+        Function<String, String> addHeader = Letter::addHeader;
+        Function<String, String> transformationPipeline = addHeader.andThen(Letter::checkSpelling).andThen(Letter::addFooter);
+        System.out.println(transformationPipeline.apply("C++ stay away from me!"));
+    }
+
+    private static String addHeader(String text) {
+        return "From Raoul, Mario and Alan:" + text;
+    }
+
+    private static String addFooter(String text) {
+        return text + "Kind regards";
+    }
+
+    private static String checkSpelling(String text) {
+        return text.replaceAll("C\\+\\+", "**Censored**");
+    }
+}