diff --git a/res/nashorn1.js b/res/nashorn1.js
deleted file mode 100644
index b342405f..00000000
--- a/res/nashorn1.js
+++ /dev/null
@@ -1,8 +0,0 @@
-var fun1 = function(name) {
-    print('Hi there from Javascript, ' + name);
-    return "greetings from javascript";
-};
-
-var fun2 = function (object) {
-    print("JS Class Definition: " + Object.prototype.toString.call(object));
-};
\ No newline at end of file
diff --git a/res/nashorn10.js b/res/nashorn10.js
deleted file mode 100644
index 9c572d5c..00000000
--- a/res/nashorn10.js
+++ /dev/null
@@ -1,29 +0,0 @@
-var results = [];
-
-var Context = function () {
-    this.foo = 'bar';
-};
-
-Context.prototype.testArgs = function () {
-    if (arguments[0]) {
-        results.push(true);
-    }
-    if (arguments[1]) {
-        results.push(true);
-    }
-    if (arguments[2]) {
-        results.push(true);
-    }
-    if (arguments[3]) {
-        results.push(true);
-    }
-};
-
-var testPerf = function () {
-    var context = new Context();
-    context.testArgs();
-    context.testArgs(1);
-    context.testArgs(1, 2);
-    context.testArgs(1, 2, 3);
-    context.testArgs(1, 2, 3, 4);
-};
\ No newline at end of file
diff --git a/res/nashorn2.js b/res/nashorn2.js
deleted file mode 100644
index 32bdd0f6..00000000
--- a/res/nashorn2.js
+++ /dev/null
@@ -1,35 +0,0 @@
-var Nashorn2 = Java.type('com.winterbe.java8.samples.nashorn.Nashorn2');
-var result = Nashorn2.fun('John Doe');
-print('\n' + result);
-
-Nashorn2.fun2(123);
-Nashorn2.fun2(49.99);
-Nashorn2.fun2(true);
-Nashorn2.fun2("hi there")
-Nashorn2.fun2(String("bam"))
-Nashorn2.fun2(new Number(23));
-Nashorn2.fun2(new Date());
-Nashorn2.fun2(new RegExp());
-Nashorn2.fun2({foo: 'bar'});
-
-
-print('passing object hash:');
-Nashorn2.fun3({
-    foo: 'bar',
-    bar: 'foo'
-});
-
-
-print('passing custom person object:');
-
-function Person(firstName, lastName) {
-    this.firstName = firstName;
-    this.lastName = lastName;
-    this.getFullName = function() {
-        return this.firstName + " " + this.lastName;
-    }
-}
-
-var person1 = new Person("Peter", "Parker");
-Nashorn2.fun3(person1);
-Nashorn2.fun4(person1);
\ No newline at end of file
diff --git a/res/nashorn3.js b/res/nashorn3.js
deleted file mode 100644
index c58114e7..00000000
--- a/res/nashorn3.js
+++ /dev/null
@@ -1,121 +0,0 @@
-print('------------------');
-print('IntArray:');
-
-var IntArray = Java.type('int[]');
-
-var array = new IntArray(5);
-array[0] = 5;
-array[1] = 4;
-array[2] = 3;
-array[3] = 2;
-array[4] = 1;
-
-try {
-    array[5] = 23;
-} catch (e) {
-    print(e.message);
-}
-
-array[0] = "17";
-print(array[0]);
-
-array[0] = "wrong type";
-print(array[0]);
-
-array[0] = "17.3";
-print(array[0]);
-
-print('------------------');
-
-for (var i in array) print(i);
-
-print('------------------');
-
-for each (var val in array) print(val);
-
-print('------------------');
-print('ArrayList:');
-
-var ArrayList = Java.type('java.util.ArrayList');
-
-var list = new ArrayList();
-list.add('a');
-list.add('b');
-list.add('c');
-
-for each (var el in list) print(el);
-
-
-print('------------------');
-print('HashMap:');
-
-var HashMap = Java.type('java.util.HashMap');
-
-var map = new HashMap();
-map.put('foo', 'foo1');
-map.put('bar', 'bar1');
-
-for each(var e in map.keySet()) print(e);
-
-for each(var e in map.values()) print(e);
-
-
-print('------------------');
-print('Streams:');
-
-var list2 = new ArrayList();
-list2.add("ddd2");
-list2.add("aaa2");
-list2.add("bbb1");
-list2.add("aaa1");
-list2.add("bbb3");
-list2.add("ccc");
-list2.add("bbb2");
-list2.add("ddd1");
-
-list2
-    .stream()
-    .filter(function(el) {
-        return el.startsWith("aaa");
-    })
-    .sorted()
-    .forEach(function(el) {
-        print(el);
-    });
-
-
-
-print('------------------');
-print('Extend:');
-
-var Runnable = Java.type('java.lang.Runnable');
-var Printer = Java.extend(Runnable, {
-    run: function() {
-        print('This was printed from a seperate thread.');
-    }
-});
-
-var Thread = Java.type('java.lang.Thread');
-new Thread(new Printer()).start();
-
-new Thread(function() {
-    print('this was printed from another thread');
-}).start();
-
-
-print('------------------');
-print('Parameter Overload:');
-
-var System = Java.type('java.lang.System');
-
-System.out.println(10);
-System.out["println"](11.0);
-System.out["println(double)"](12);
-
-print('------------------');
-print('JavaBeans:');
-
-var Date = Java.type('java.util.Date');
-var date = new Date();
-date.year += 1900;
-System.out.println(date.year);
\ No newline at end of file
diff --git a/res/nashorn4.js b/res/nashorn4.js
deleted file mode 100644
index 461ebca4..00000000
--- a/res/nashorn4.js
+++ /dev/null
@@ -1,98 +0,0 @@
-// function literal with no braces
-
-function sqr(x) x * x;
-
-print(sqr(3));
-
-
-// for each
-
-var array = [1, 2, 3, 4];
-for each (var num in array) print(num);
-
-
-// object literals in constructors
-
-var runnable = new java.lang.Runnable() {
-    run: function() {
-        print('on the run');
-    }
-};
-
-runnable.run();
-
-
-// bind properties
-
-var o1 = {};
-var o2 = { foo: 'bar'};
-
-Object.bindProperties(o1, o2);
-
-print(o1.foo);
-o1.foo = 'BAM';
-print(o2.foo);
-
-
-// string trim
-
-print("   hehe".trimLeft());
-print("hehe    ".trimRight() + "he");
-
-
-// whereis
-print(__FILE__, __LINE__, __DIR__);
-
-
-// java import
-
-var imports = new JavaImporter(java.io, java.lang);
-with (imports) {
-    var file = new File(__FILE__);
-    System.out.println(file.getAbsolutePath());
-    // /path/to/my/script.js
-}
-
-
-// convert iterable to js array
-
-var list = new java.util.ArrayList();
-list.add("s1");
-list.add("s2");
-list.add("s3");
-
-var jsArray = Java.from(list);
-print(jsArray);
-print(Object.prototype.toString.call(jsArray));
-
-
-// convert js array to java array
-
-var javaArray = Java.to([3, 5, 7, 11], "int[]");
-print(Object.prototype.toString.call(javaArray));
-
-
-// calling super
-
-var SuperRunner = Java.type('com.winterbe.java8.samples.nashorn.SuperRunner');
-var Runner = Java.extend(SuperRunner);
-
-var runner = new Runner() {
-    run: function() {
-        Java.super(runner).run();
-        print('on my run');
-    }
-}
-runner.run();
-
-
-
-// load
-
-load('http://cdnjs.cloudflare.com/ajax/libs/underscore.js/1.6.0/underscore-min.js');
-
-var odds = _.filter([1, 2, 3, 4, 5, 6], function (num) {
-    return num % 2 == 1;
-});
-
-print(odds);
\ No newline at end of file
diff --git a/res/nashorn5.js b/res/nashorn5.js
deleted file mode 100644
index f7d01768..00000000
--- a/res/nashorn5.js
+++ /dev/null
@@ -1,22 +0,0 @@
-function Product(name) {
-    this.name = name;
-}
-
-Product.prototype.stock = 0;
-Product.prototype.price = 0;
-Product.prototype.getValueOfGoods = function() {
-    return this.stock * this.price;
-};
-
-var product = new Product('Pencil');
-product.price = 4.99;
-product.stock = 78;
-
-print('Value of Goods: ' + product.getValueOfGoods());
-
-
-var getValueOfGoods = function(javaProduct) {
-    var jsProduct = new Product();
-    Object.bindProperties(jsProduct, javaProduct);
-    return jsProduct.getValueOfGoods();
-};
\ No newline at end of file
diff --git a/res/nashorn6.js b/res/nashorn6.js
deleted file mode 100644
index f4bae9a5..00000000
--- a/res/nashorn6.js
+++ /dev/null
@@ -1,47 +0,0 @@
-load('http://cdnjs.cloudflare.com/ajax/libs/underscore.js/1.6.0/underscore-min.js');
-load('http://cdnjs.cloudflare.com/ajax/libs/backbone.js/1.1.2/backbone-min.js');
-
-
-// simple backbone model:
-// valueOfGoods will automatically be calculated when stock or price changes
-var Product = Backbone.Model.extend({
-    defaults: {
-        stock: 0,
-        price: 0.0,
-        name:'',
-        valueOfGoods: 0.0
-    },
-
-    initialize: function() {
-        this.on('change:stock change:price', function() {
-            var stock = this.get('stock');
-            var price = this.get('price');
-            var valueOfGoods = this.getValueOfGoods(stock, price);
-            this.set('valueOfGoods', valueOfGoods);
-        });
-    },
-
-    getValueOfGoods: function(stock, price) {
-        return stock * price;
-    }
-});
-
-var product = new Product();
-product.set('name', 'Pencil');
-product.set('stock', 1000);
-product.set('price', 3.99);
-
-
-// pass backbone model to java method
-var Nashorn6 = Java.type('com.winterbe.java8.samples.nashorn.Nashorn6');
-Nashorn6.getProduct(product.attributes);
-
-
-// bind java object to backbone model and pass result back to java
-var calculate = function(javaProduct) {
-    var model = new Product();
-    model.set('name', javaProduct.name);
-    model.set('price', javaProduct.price);
-    model.set('stock', javaProduct.stock);
-    return model.attributes;
-};
\ No newline at end of file
diff --git a/res/nashorn7.js b/res/nashorn7.js
deleted file mode 100644
index 9246f163..00000000
--- a/res/nashorn7.js
+++ /dev/null
@@ -1,27 +0,0 @@
-function sqrt(x)  x * x
-print(sqrt(3));
-
-var array = [1, 2, 3, 4];
-for each (var num in array) print(num);
-
-var runnable = new java.lang.Runnable() {
-    run: function () {
-        print('on the run');
-    }
-};
-
-runnable.run();
-
-var System = Java.type('java.lang.System');
-System.out["println(double)"](12);
-
-var Arrays = Java.type("java.util.Arrays");
-var javaArray = Java.to([2, 3, 7, 11, 14], "int[]");
-
-Arrays.stream(javaArray)
-    .filter(function (num) {
-        return num % 2 === 1;
-    })
-    .forEach(function (num) {
-        print(num);
-    });
\ No newline at end of file
diff --git a/res/nashorn8.js b/res/nashorn8.js
deleted file mode 100644
index d7bb6a67..00000000
--- a/res/nashorn8.js
+++ /dev/null
@@ -1,18 +0,0 @@
-var evaluate1 = function () {
-    (function () {
-        print(eval("this"));
-    }).call(this);
-};
-
-var evaluate2 = function () {
-    var context = {};
-    (function () {
-        print(eval("this"));
-    }).call(context);
-};
-
-var evaluate3 = function (context) {
-    (function () {
-        print(eval("this"));
-    }).call(context);
-};
\ No newline at end of file
diff --git a/res/nashorn9.js b/res/nashorn9.js
deleted file mode 100644
index e60e2b06..00000000
--- a/res/nashorn9.js
+++ /dev/null
@@ -1,9 +0,0 @@
-var size = 100000;
-
-var testPerf = function () {
-    var result = Math.floor(Math.random() * size) + 1;
-    for (var i = 0; i < size; i++) {
-        result += i;
-    }
-    return result;
-};
\ No newline at end of file
diff --git a/src/com/winterbe/java8/samples/concurrent/LongAccumulator1.java b/src/com/winterbe/java8/samples/concurrent/LongAccumulator1.java
index fa000a1b..9bd81e42 100644
--- a/src/com/winterbe/java8/samples/concurrent/LongAccumulator1.java
+++ b/src/com/winterbe/java8/samples/concurrent/LongAccumulator1.java
@@ -16,9 +16,8 @@ public static void main(String[] args) {
     }
 
     private static void testAccumulate() {
-        LongBinaryOperator op = (x, y) -> 2 * x + y;
-        LongAccumulator accumulator = new LongAccumulator(op, 1L);
-
+        LongBinaryOperator op = (x, y) -> 2 * x + y;//定义一个二元操作
+        LongAccumulator accumulator = new LongAccumulator(op, 1L);//生成新二元操作对象的累加方法,初始值为1
         ExecutorService executor = Executors.newFixedThreadPool(2);
 
         IntStream.range(0, 10)
diff --git a/src/com/winterbe/java8/samples/concurrent/LongAdder1.java b/src/com/winterbe/java8/samples/concurrent/LongAdder1.java
index 98cb1843..1f2181b9 100644
--- a/src/com/winterbe/java8/samples/concurrent/LongAdder1.java
+++ b/src/com/winterbe/java8/samples/concurrent/LongAdder1.java
@@ -12,7 +12,7 @@ public class LongAdder1 {
 
     private static final int NUM_INCREMENTS = 10000;
 
-    private static LongAdder adder = new LongAdder();
+    private static LongAdder adder = new LongAdder();//JAVA8的原子对象
 
     public static void main(String[] args) {
         testIncrement();
diff --git a/src/com/winterbe/java8/samples/lambda/Lambda1.java b/src/com/winterbe/java8/samples/lambda/Lambda1.java
index 5bb5b658..66b2c678 100644
--- a/src/com/winterbe/java8/samples/lambda/Lambda1.java
+++ b/src/com/winterbe/java8/samples/lambda/Lambda1.java
@@ -37,7 +37,7 @@ public int compare(String a, String b) {
 
         List<String> names2 = Arrays.asList("peter", null, "anna", "mike", "xenia");
         names2.sort(Comparator.nullsLast(String::compareTo));
-        System.out.println(names2);
+        System.out.println("nulllast"+names2);
 
         List<String> names3 = null;
 
diff --git a/src/com/winterbe/java8/samples/stream/Optional1.java b/src/com/winterbe/java8/samples/stream/Optional1.java
index efd779e2..dc9eb303 100644
--- a/src/com/winterbe/java8/samples/stream/Optional1.java
+++ b/src/com/winterbe/java8/samples/stream/Optional1.java
@@ -1,5 +1,7 @@
 package com.winterbe.java8.samples.stream;
 
+import java.util.Arrays;
+import java.util.List;
 import java.util.Optional;
 
 /**
@@ -15,6 +17,9 @@ public static void main(String[] args) {
         optional.orElse("fallback");    // "bam"
 
         optional.ifPresent((s) -> System.out.println(s.charAt(0)));     // "b"
+
+        List<String> alist= Arrays.asList("abc","cba",null,"aaa");
+        System.out.println (alist.stream().anyMatch(m->{return "abc".equals(m);}));
     }
 
 }
\ No newline at end of file
diff --git a/src/com/winterbe/java8/samples/stream/Streams10.java b/src/com/winterbe/java8/samples/stream/Streams10.java
index 22483248..b415c5c9 100644
--- a/src/com/winterbe/java8/samples/stream/Streams10.java
+++ b/src/com/winterbe/java8/samples/stream/Streams10.java
@@ -34,17 +34,18 @@ public static void main(String[] args) {
                 new Person("Max", 18),
                 new Person("Peter", 23),
                 new Person("Pamela", 23),
+                    new Person("Pame22la", 23),
                 new Person("David", 12));
 
 //        test1(persons);
 //        test2(persons);
 //        test3(persons);
 //        test4(persons);
-//        test5(persons);
+        test5(persons);
 //        test6(persons);
 //        test7(persons);
 //        test8(persons);
-        test9(persons);
+//        test9(persons);
     }
 
     private static void test1(List<Person> persons) {
diff --git a/src/com/winterbe/java8/samples/stream/Streams11.java b/src/com/winterbe/java8/samples/stream/Streams11.java
index 8ded3978..e415f320 100644
--- a/src/com/winterbe/java8/samples/stream/Streams11.java
+++ b/src/com/winterbe/java8/samples/stream/Streams11.java
@@ -19,7 +19,10 @@ static class Person {
 
         @Override
         public String toString() {
-            return name;
+            return "Person{" +
+                    "name='" + name + '\'' +
+                    ", age=" + age +
+                    '}';
         }
     }
 
diff --git a/src/com/winterbe/java8/samples/time/LocalDateTime1.java b/src/com/winterbe/java8/samples/time/LocalDateTime1.java
index 78134f5d..2d586d2e 100644
--- a/src/com/winterbe/java8/samples/time/LocalDateTime1.java
+++ b/src/com/winterbe/java8/samples/time/LocalDateTime1.java
@@ -1,10 +1,6 @@
 package com.winterbe.java8.samples.time;
 
-import java.time.DayOfWeek;
-import java.time.Instant;
-import java.time.LocalDateTime;
-import java.time.Month;
-import java.time.ZoneId;
+import java.time.*;
 import java.time.format.DateTimeFormatter;
 import java.time.temporal.ChronoField;
 import java.util.Date;
@@ -16,7 +12,12 @@ public class LocalDateTime1 {
 
     public static void main(String[] args) {
 
+
         LocalDateTime sylvester = LocalDateTime.of(2014, Month.DECEMBER, 31, 23, 59, 59);
+        LocalDateTime now = LocalDateTime.now();
+
+        Duration bt=Duration.between(sylvester,now);
+        System.out.println(now.plus(bt));
 
         DayOfWeek dayOfWeek = sylvester.getDayOfWeek();
         System.out.println(dayOfWeek);      // WEDNESDAY