添加ArrayList的Demo以及自己写的简单的ArrayList

byhieg · byhieg · commit d07bbe357b07 · 2017-02-07T15:53:48.000+08:00
diff --git a/src/main/java/cn/byhieg/collectiontutorial/listtutorial/MyArrayList.java b/src/main/java/cn/byhieg/collectiontutorial/listtutorial/MyArrayList.java
@@ -0,0 +1,29 @@
+package cn.byhieg.collectiontutorial.listtutorial;
+
+/**
+ * Created by byhieg on 17/2/7.
+ * Mail to byhieg@gmail.com
+ */
+public class MyArrayList<E> {
+
+
+    private final static int DEFAULT_CAPACITY = 10;
+    private int size;
+
+    private Object [] elementData;
+
+    //默认的构造方法
+    public MyArrayList(){
+        this(DEFAULT_CAPACITY);
+    }
+
+    public MyArrayList(int size){
+        if (size < 0){
+            throw new IllegalArgumentException("默认的大小" + size);
+        }else{
+            elementData = new Object[size];
+        }
+    }
+
+    
+}
diff --git a/src/test/java/cn/byhieg/collectiontutorialtest/ArrayListDemoTest.java b/src/test/java/cn/byhieg/collectiontutorialtest/ArrayListDemoTest.java
@@ -2,7 +2,6 @@
 
 import cn.byhieg.collectiontutorial.listtutorial.ArrayListDemo;
 import junit.framework.TestCase;
-
 import java.util.Iterator;
 
 /**
@@ -17,10 +16,17 @@ public void testList() throws Exception{
         for (int i = 0 ;i < 10 ; i++){
             demo.getListA().add(i);
         }
-        Iterator iterator = demo.getListA().iterator();
-        while (iterator.hasNext()) {
-            System.out.println(iterator.next());
+        Iterator iteratorA = demo.getListA().iterator();
+        while (iteratorA.hasNext()) {
+            System.out.println(iteratorA.next());
+        }
+
+        demo.setListC(demo.getListA());
+        Iterator iteratorC = demo.getListC().iterator();
+        while (iteratorC.hasNext()) {
+            System.out.println(iteratorC.next());
         }
+
     }
 
 }
