completed arraylist

.idea/.name

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+generics

.idea/compiler.xml

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.idea/libraries/Maven__junit_junit_4_12.xml

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.idea/libraries/Maven__org_hamcrest_hamcrest_core_1_3.xml

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.idea/modules.xml

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.idea/vcs.xml

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.idea/workspace.xml

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generics.iml

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+<?xml version="1.0" encoding="UTF-8"?>
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+  <component name="NewModuleRootManager" LANGUAGE_LEVEL="JDK_1_7">
+    <output url="file://$MODULE_DIR$/target/classes" />
+    <output-test url="file://$MODULE_DIR$/target/test-classes" />
+    <content url="file://$MODULE_DIR$">
+      <sourceFolder url="file://$MODULE_DIR$/src/main/java" isTestSource="false" />
+      <sourceFolder url="file://$MODULE_DIR$/src/test/java" isTestSource="true" />
+      <excludeFolder url="file://$MODULE_DIR$/target" />
+    </content>
+    <orderEntry type="inheritedJdk" />
+    <orderEntry type="sourceFolder" forTests="false" />
+    <orderEntry type="library" name="Maven: junit:junit:4.12" level="project" />
+    <orderEntry type="library" name="Maven: org.hamcrest:hamcrest-core:1.3" level="project" />
+  </component>
+</module>

src/main/java/MyArrayList.java

@@ -0,0 +1,107 @@
+/*
+ MyArrayList must be a generic type, which can store any other type of object
+- MyArrayList must not use List, ArrayList or any other collection type in its implementation,
+ only Arrays (The purpose of this is to practice designing your own generic class from the ground up,
+  so that you can appreciate their complexities and usefulness)
+- MyArrayList must have `add()`, `get()`, `remove()`, `set()`, `clear()`, `isEmpty()`, `contains()`
+ and other methods to provide the same basic functionality described
+ in the [ArrayList documentation](https://docs.oracle.com/javase/7/docs/api/java/util/ArrayList.html)
+- `add()` should be overridden to add an element to the end of the Array,
+or to add the element to a specified index in the array.
+- MyArrayList must have a no-argument constructor (`MyArrayList()`)
+ to initialize a new instance, it should also have a one-argument constructor (`MyArrayList(int)`)
+ that takes an int and starts the list off at the specified size.
+- MyArrayList should automatically resize and maintain its order.
+
+ */
+
+
+import java.lang.reflect.Array;
+import java.util.ArrayList;
+import java.util.Arrays;
+
+public class MyArrayList <E>{
+
+
+      private int size;
+      private Object[] elements;
+
+
+
+    public MyArrayList( ) {         // constructor
+         elements =new Object[10];  // allocate initial capacity of 10
+          size = 0;
+      }
+
+      public void add(Object  o) {
+          if (size < elements.length) {
+              elements[size] = o;
+          } else {
+              // allocate a larger array and add the element, omitted
+          }
+          ++size;
+
+      }
+
+     //getting the size of an array
+     public int size() {
+        return size;
+    }
+    //getting data from specifid index
+    public E get(int index) {
+        //if (index >= size)
+          //  throw new IndexOutOfBoundsException("Index: " + index + ", Size: " + size);
+        return (E)elements[index];
+    }
+    public boolean isEmpty()
+    {   boolean flag=false;
+        if(elements  ==null){
+            return true;
+        }
+        else
+            return false;
+    }
+
+    public Boolean  contains(Object  o) {
+         boolean flag=false;
+        for (Object e : elements) {
+            if (e.equals(o) )
+                return true;
+            else
+                flag=false;
+        }
+        return flag;
+    }
+    public E[] remove(E  objectToRemove) {
+        Integer n = 0;
+        boolean flag = false;
+        Object[] newArray = new Object[size - 1];
+        for (int i = 0; i < size(); i++) {
+            if (elements[i] != objectToRemove) {
+                newArray[n] = elements[i];
+                n++;
+
+            }
+
+        } size--;
+
+            elements = newArray;
+            return (E[]) elements;
+        }
+
+    public void clear(){
+      elements =new Object[10] ;
+     Arrays.fill(elements,null ) ;
+     size=0;
+   }
+
+    public void set(int i, E object){
+       elements [i] = object;
+
+    }
+
+}
+
+
+
+

src/main/java/MySet.java

@@ -0,0 +1,12 @@
+/*
+MySet must be a generic type, which can store any other type of object
+- An instance of MySet must contain no duplicates
+- MySet must not use List, ArrayList, or any other built-in collection types
+ in its implementation. You may use Arrays, and you may use your implementation
+ of MyArrayList (if it helps -- you don't have to use it)
+- MySet must have all of the methods listed on the [Java Set documentation](https://docs.oracle.com/javase/7/docs/api/java/util/Set.html)
+
+ */
+
+public class MySet {
+}

src/test/java/MyArrayListTest.java

@@ -0,0 +1,83 @@
+import org.junit.Assert;
+import org.junit.Test;
+
+import java.lang.annotation.Target;
+import java.util.ArrayList;
+import java.util.List;
+
+public class MyArrayListTest<E> {
+    @Test
+
+    public void testadd()
+    {
+        MyArrayList mylist=new MyArrayList( );
+        mylist.add("abs");
+        int expected = 1;
+        int  actual=mylist.size();
+       Assert.assertEquals(expected ,actual) ;
+
+    }
+    @Test
+    public void testget(){
+
+        MyArrayList mylist=new MyArrayList( );
+        mylist.add("abs");
+        mylist.add(1) ;
+        int expected=1;
+        Assert.assertEquals(expected,mylist.get(1) ) ;
+
+
+    }
+    @Test
+    public void testempty()
+    {
+        MyArrayList mylist=new MyArrayList( );
+        mylist.add("abs");
+        mylist.add(1) ;
+        boolean expected=false;
+        Assert.assertEquals(expected,mylist.isEmpty()) ;
+
+    }
+    @Test
+    public void testcontains(){
+        MyArrayList mylist=new MyArrayList( );
+        mylist.add("abs");
+        mylist.add(1) ;
+        boolean expected=true;
+        Assert.assertEquals(expected,mylist.contains(1) ) ;
+    }
+    @Test
+    public void testremove(){
+        MyArrayList mylist=new MyArrayList( );
+        mylist.add(0);
+        mylist.add(1) ;
+        mylist.add(2);
+        mylist.add(3) ;
+        Object [] expected={0,2,3};
+
+       // Assert.assertEquals(expected,mylist.remove(1) ) ;
+        Assert.assertArrayEquals(expected, mylist.remove(1) );
+    }
+    @Test
+    public void testclear(){
+        MyArrayList mylist=new MyArrayList( );
+        mylist.add(1);
+        mylist.add(2);
+        mylist.add(3);
+        int expected=0;
+        mylist.clear();
+        Assert.assertEquals(expected,mylist.size()   ) ;
+    }
+    @Test
+    public void testset()
+    {
+        MyArrayList mylist=new MyArrayList( );
+        mylist.add(2) ;
+        mylist.add(3);
+        mylist.set(2,4) ;
+        Object  expected=4;
+
+        Assert.assertEquals(expected,mylist.get(2)  ) ;
+
+    }
+}