🍱 add java8 growing code

hellokaton · hellokaton · commit 7acb389a5b37 · 2018-02-08T15:23:01.000+08:00
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
@@ -2,6 +2,9 @@
 
 /**
  * &#33258;&#21160;&#35013;&#31665;&#12289;&#25286;&#31665;
+ *
+ * @author biezhi
+ * @date 2018/2/8
  */
 public class AutoBoxing {
 
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
@@ -10,6 +10,9 @@
 
 /**
  * &#24182;&#21457;&#24211;
+ *
+ * @author biezhi
+ * @date 2018/2/8
  */
 public class Concurrent {
 
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
@@ -2,6 +2,9 @@
 
 /**
  * &#26522;&#20030;
+ *
+ * @author biezhi
+ * @date 2018/2/8
  */
 public enum EnumDemo {
 
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
@@ -5,6 +5,9 @@
 
 /**
  * for each
+ *
+ * @author biezhi
+ * @date 2018/2/8
  */
 public class ForEach {
 
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
@@ -5,9 +5,16 @@
 
 /**
  * &#27867;&#22411;
+ *
+ * @author biezhi
+ * @date 2018/2/8
  */
 public class Generic<T> {
 
+    public T getById(Integer id){
+        return null;
+    }
+
     public static void main(String[] args) {
 
         Map<String, Integer> map = new HashMap<>();
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
@@ -4,6 +4,9 @@
 
 /**
  * &#38745;&#24577;&#23548;&#20837;
+ *
+ * @author biezhi
+ * @date 2018/2/8
  */
 public class StaticImport {
 
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
@@ -5,6 +5,9 @@
 
 /**
  * &#21464;&#38271;&#21442;&#25968;
+ *
+ * @author biezhi
+ * @date 2018/2/8
  */
 public class VarArgs {
 
diff --git a/java8-growing/src/main/java/io/github/biezhi/java8/growing/jdk7/CatchMultiException.java b/java8-growing/src/main/java/io/github/biezhi/java8/growing/jdk7/CatchMultiException.java
@@ -0,0 +1,28 @@
+package io.github.biezhi.java8.growing.jdk7;
+
+import java.io.BufferedReader;
+import java.io.FileReader;
+import java.io.IOException;
+import java.sql.Connection;
+import java.sql.SQLException;
+import java.sql.Statement;
+
+/**
+ * &#25429;&#33719;&#22810;&#24322;&#24120;
+ *
+ * @author biezhi
+ * @date 2018/2/8
+ */
+public class CatchMultiException {
+
+    public static void main(String[] args) {
+        try {
+            BufferedReader reader = new BufferedReader(new FileReader(""));
+            Connection     con    = null;
+            Statement      stmt   = con.createStatement();
+        } catch (IOException | SQLException e) {
+            //&#25429;&#33719;&#22810;&#20010;&#24322;&#24120;&#65292;e&#23601;&#26159;final&#31867;&#22411;&#30340;
+            e.printStackTrace();
+        }
+    }
+}
diff --git a/java8-growing/src/main/java/io/github/biezhi/java8/growing/jdk7/NumericUnderline.java b/java8-growing/src/main/java/io/github/biezhi/java8/growing/jdk7/NumericUnderline.java
@@ -0,0 +1,18 @@
+package io.github.biezhi.java8.growing.jdk7;
+
+/**
+ * &#25968;&#23383;&#19979;&#21010;&#32447;&#25903;&#25345;
+ *
+ * @author biezhi
+ * @date 2018/2/8
+ */
+public class NumericUnderline {
+
+    public static void main(String[] args) {
+        int   num         = 1234_5678_9;
+        float num2        = 222_33F;
+        long  num3        = 123_000_111L;
+        long  tenSenconds = 10_000L;
+    }
+
+}
diff --git a/java8-growing/src/main/java/io/github/biezhi/java8/growing/jdk7/SwitchString.java b/java8-growing/src/main/java/io/github/biezhi/java8/growing/jdk7/SwitchString.java
@@ -0,0 +1,39 @@
+package io.github.biezhi.java8.growing.jdk7;
+
+import io.github.biezhi.java8.growing.jdk5.EnumDemo;
+
+/**
+ * switch&#23545;String&#30340;&#25903;&#25345;
+ *
+ * @author biezhi
+ * @date 2018/2/8
+ */
+public class SwitchString {
+
+    public static void main(String[] args) {
+        String bis = "java";
+        switch (bis) {
+            case "java":
+                break;
+            case "python":
+                break;
+            case "ruby":
+                break;
+            default:
+                break;
+        }
+
+        EnumDemo enumDemo = EnumDemo.GREEN;
+
+        switch (enumDemo) {
+            case RED:
+                break;
+            case YELLOW:
+                break;
+            default:
+                break;
+        }
+        
+    }
+
+}
diff --git a/java8-growing/src/main/java/io/github/biezhi/java8/growing/jdk7/TryWithResource.java b/java8-growing/src/main/java/io/github/biezhi/java8/growing/jdk7/TryWithResource.java
@@ -0,0 +1,30 @@
+package io.github.biezhi.java8.growing.jdk7;
+
+import io.github.biezhi.java8.growing.jdk6.ScriptEngineDemo;
+
+import java.io.BufferedReader;
+import java.io.FileReader;
+import java.io.IOException;
+
+/**
+ * try-with-resource
+ *
+ * @author biezhi
+ * @date 2018/2/8
+ */
+public class TryWithResource {
+
+    public static void main(String[] args) {
+        String path = ScriptEngineDemo.class.getResource("/test.js").getPath();
+
+        try (BufferedReader br = new BufferedReader(new FileReader(path))) {
+            String str = br.readLine();
+            while (null != str) {
+                System.out.println(str);
+                str = br.readLine();
+            }
+        } catch (IOException e) {
+            e.printStackTrace();
+        }
+    }
+}
diff --git a/java8-growing/src/main/java/io/github/biezhi/java8/growing/jdk7/TypeInference.java b/java8-growing/src/main/java/io/github/biezhi/java8/growing/jdk7/TypeInference.java
@@ -0,0 +1,21 @@
+package io.github.biezhi.java8.growing.jdk7;
+
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * &#31867;&#22411;&#25512;&#26029;
+ *
+ * @author biezhi
+ * @date 2018/2/8
+ */
+public class TypeInference {
+
+    public static void main(String[] args) {
+        List<String> list = new ArrayList<>();
+        list.add("A");
+
+        List<? extends String> list2 = new ArrayList<>();
+        list.addAll(list2);
+    }
+}
