🍱 add java8 growing code

hellokaton · hellokaton · commit 60af82be05e0 · 2018-02-08T11:59:09.000+08:00
diff --git a/java8-growing/pom.xml b/java8-growing/pom.xml
@@ -0,0 +1,14 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <parent>
+        <artifactId>learn-java8</artifactId>
+        <groupId>io.github.biezhi</groupId>
+        <version>1.0-SNAPSHOT</version>
+    </parent>
+    <modelVersion>4.0.0</modelVersion>
+
+    <artifactId>java8-growing</artifactId>
+
+</project>
diff --git a/java8-growing/src/main/java/io/github/biezhi/java8/growing/jdk5/AutoBoxing.java b/java8-growing/src/main/java/io/github/biezhi/java8/growing/jdk5/AutoBoxing.java
@@ -0,0 +1,17 @@
+package io.github.biezhi.java8.growing.jdk5;
+
+/**
+ * &#33258;&#21160;&#35013;&#31665;&#12289;&#25286;&#31665;
+ */
+public class AutoBoxing {
+
+    public static void main(String[] args) {
+        int     a = new Integer(66);
+        Integer b = 18;
+
+        Boolean flag  = true;
+        boolean isBug = Boolean.FALSE;
+
+    }
+
+}
diff --git a/java8-growing/src/main/java/io/github/biezhi/java8/growing/jdk5/Concurrent.java b/java8-growing/src/main/java/io/github/biezhi/java8/growing/jdk5/Concurrent.java
@@ -0,0 +1,82 @@
+package io.github.biezhi.java8.growing.jdk5;
+
+import java.util.List;
+import java.util.Map;
+import java.util.Queue;
+import java.util.concurrent.*;
+import java.util.concurrent.locks.Condition;
+import java.util.concurrent.locks.Lock;
+import java.util.concurrent.locks.ReentrantLock;
+
+/**
+ * &#24182;&#21457;&#24211;
+ */
+public class Concurrent {
+
+    public void lock() {
+        Lock lock = new ReentrantLock();
+        lock.lock();
+        try {
+            System.out.println("hello world");
+        } finally {
+            lock.unlock();
+        }
+    }
+
+    public void condition() throws InterruptedException {
+        Lock      lock      = new ReentrantLock();
+        Condition condition = lock.newCondition();
+        // do something
+        condition.await(10, TimeUnit.SECONDS);
+        System.out.println("Get result.");
+    }
+
+    public void executorService() {
+        ExecutorService executorService = Executors.newFixedThreadPool(3);
+        executorService.submit(new Runnable() {
+            @Override
+            public void run() {
+                System.out.println("Task is running.");
+            }
+        });
+    }
+
+    public void blockingDeque() {
+        Queue<Integer> blockingDeque = new ArrayBlockingQueue<>(20);
+        blockingDeque.add(1);
+        blockingDeque.add(2);
+        blockingDeque.add(3);
+
+        blockingDeque.peek();
+    }
+
+    public void concurrentHashMap() {
+        Map<String, Integer> concurrentHashMap = new ConcurrentHashMap<>();
+        concurrentHashMap.put("Hello", 1);
+        concurrentHashMap.put("World", 2);
+
+        System.out.println(concurrentHashMap.get("Hello"));
+    }
+
+    public void copyOnWriteList() {
+        List<String> copyOnWriteList = new CopyOnWriteArrayList<>();
+        copyOnWriteList.add("a");
+        copyOnWriteList.add("b");
+        copyOnWriteList.add("c");
+
+        System.out.println(copyOnWriteList.size());
+    }
+
+    public void semaphore() {
+        Semaphore semaphore = new Semaphore(3);
+        try {
+            semaphore.acquire();
+            System.out.println(Thread.currentThread().getName() + " is working");
+            Thread.sleep(1000);
+            semaphore.release();
+            System.out.println(Thread.currentThread().getName() + " is over");
+        } catch (InterruptedException e) {
+        }
+    }
+
+}
diff --git a/java8-growing/src/main/java/io/github/biezhi/java8/growing/jdk5/EnumDemo.java b/java8-growing/src/main/java/io/github/biezhi/java8/growing/jdk5/EnumDemo.java
@@ -0,0 +1,10 @@
+package io.github.biezhi.java8.growing.jdk5;
+
+/**
+ * &#26522;&#20030;
+ */
+public enum EnumDemo {
+
+    RED, GREEN, YELLOW
+
+}
diff --git a/java8-growing/src/main/java/io/github/biezhi/java8/growing/jdk5/ForEach.java b/java8-growing/src/main/java/io/github/biezhi/java8/growing/jdk5/ForEach.java
@@ -0,0 +1,25 @@
+package io.github.biezhi.java8.growing.jdk5;
+
+import java.util.Arrays;
+import java.util.List;
+
+/**
+ * for each
+ */
+public class ForEach {
+
+    public static void main(String[] args) {
+
+        int[] arr = {1, 4, 5, 7};
+
+        for (int i : arr) {
+            System.out.println(i);
+        }
+
+        List<String> names = Arrays.asList("&#29579;&#29237;nice", "Gay&#20912;", "A*&#29066;");
+        for (String name : names) {
+            System.out.println(name);
+        }
+    }
+
+}
diff --git a/java8-growing/src/main/java/io/github/biezhi/java8/growing/jdk5/Generic.java b/java8-growing/src/main/java/io/github/biezhi/java8/growing/jdk5/Generic.java
@@ -0,0 +1,19 @@
+package io.github.biezhi.java8.growing.jdk5;
+
+import java.util.HashMap;
+import java.util.Map;
+
+/**
+ * &#27867;&#22411;
+ */
+public class Generic<T> {
+
+    public static void main(String[] args) {
+
+        Map<String, Integer> map = new HashMap<>();
+
+        Generic<Long> generic = new Generic<>();
+
+    }
+
+}
diff --git a/java8-growing/src/main/java/io/github/biezhi/java8/growing/jdk5/StaticImport.java b/java8-growing/src/main/java/io/github/biezhi/java8/growing/jdk5/StaticImport.java
@@ -0,0 +1,14 @@
+package io.github.biezhi.java8.growing.jdk5;
+
+import static java.lang.System.out;
+
+/**
+ * &#38745;&#24577;&#23548;&#20837;
+ */
+public class StaticImport {
+
+    public static void main(String[] args) {
+        out.println("Hi let learn java 8.");
+    }
+
+}
diff --git a/java8-growing/src/main/java/io/github/biezhi/java8/growing/jdk5/VarArgs.java b/java8-growing/src/main/java/io/github/biezhi/java8/growing/jdk5/VarArgs.java
@@ -0,0 +1,20 @@
+package io.github.biezhi.java8.growing.jdk5;
+
+import java.util.Arrays;
+import java.util.List;
+
+/**
+ * &#21464;&#38271;&#21442;&#25968;
+ */
+public class VarArgs {
+
+    public static List<String> asList(String[] names){
+        return Arrays.asList(names);
+    }
+
+    public static void main(String[] args) {
+        List<String> hello = Arrays.asList("&#29579;&#29237;nice", "Gay&#20912;", "A*&#29066;");
+
+    }
+
+}
diff --git a/pom.xml b/pom.xml
@@ -19,6 +19,7 @@
         <module>java8-best-practice</module>
         <module>java8-proper</module>
         <module>java8-concurrent</module>
+        <module>java8-growing</module>
     </modules>
     
     <dependencies>

-Original file line number
+Diff line change
@@ @@ -0,0 +1,10 @@ @@
 +package io.github.biezhi.java8.growing.jdk5;
++
 +/**
 + * 枚举
 + */
 +public enum EnumDemo {
++
 +    RED, GREEN, YELLOW
++
 +}