chakra-coder
diff --git a/‎apacheCommons/src/main/java/com/javalearning/collection/CollectionUtilExample.java‎
Lines changed: 56 additions & 0 deletions b/‎apacheCommons/src/main/java/com/javalearning/collection/CollectionUtilExample.java‎
Lines changed: 56 additions & 0 deletions
diff --git a/‎apacheCommons/src/main/java/com/javalearning/collection/LazyMapExample.java‎
Lines changed: 34 additions & 0 deletions b/‎apacheCommons/src/main/java/com/javalearning/collection/LazyMapExample.java‎
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+package com.javalearning.collection;
+
+import org.apache.commons.collections4.Closure;
+import org.apache.commons.collections4.CollectionUtils;
+import org.apache.commons.lang3.builder.ReflectionToStringBuilder;
+import org.apache.commons.lang3.builder.ToStringStyle;
+
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * Created by renqun.yuan on 2015/11/4.
+ */
+public class CollectionUtilExample {
+    public static void main(String[] args) {
+        new CollectionUtilExample().test();
+    }
+
+    public void test() {
+        List<A> aList = new ArrayList<A>();
+        A a = new A(1);
+        aList.add(a);
+        aList.add(new A(2));
+        CollectionUtils.forAllDo(aList, new Closure<A>() {
+            @Override
+            public void execute(A input) {
+                input.setId(5);
+            }
+        });
+
+        System.out.println(aList);
+    }
+
+    class A {
+        private Integer id;
+
+        public Integer getId() {
+            return id;
+        }
+
+        public void setId(Integer id) {
+            this.id = id;
+        }
+
+        public A(Integer id) {
+
+            this.id = id;
+        }
+
+        @Override
+        public String toString() {
+            return ReflectionToStringBuilder.toString(this,ToStringStyle.JSON_STYLE);
+        }
+    }
+
+}
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+package com.javalearning.collection;
+
+import org.apache.commons.collections4.Transformer;
+import org.apache.commons.collections4.map.LazyMap;
+import org.apache.commons.lang3.StringUtils;
+
+import java.util.HashMap;
+import java.util.Map;
+
+/**
+ * Created by renqun.yuan on 2015/11/4.
+ */
+public class LazyMapExample {
+    public static void main(String[] args) {
+        Map<String, Integer> map = new HashMap<>();
+        LazyMap<String, Integer> lazyMap = LazyMap.lazyMap(map, new Transformer<String, Integer>() {
+            @Override
+            public Integer transform(String input) {
+                if (StringUtils.isNotBlank(input)) {
+                    return Integer.parseInt(input);
+                }
+                return null;
+            }
+        });
+
+        lazyMap.get("123");
+
+        lazyMap.get("123");
+        System.out.println(lazyMap.size());
+        lazyMap.get("12");
+
+        System.out.println(lazyMap.size());
+    }
+}