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    <p>Something like this?<br/> <img src="https://i.stack.imgur.com/YK66g.png" alt="enter image description here"><br/> <strong>EDIT0:</strong> and a simple object diagram sample<br/> <img src="https://i.stack.imgur.com/WGApr.png" alt="enter image description here"><br/> <br/> <strong>Edit1:</strong><br/> explanation: in object diagram you should specify the value of each variable, here the <code>i=1990</code> is an example, it could be any number. </p> <pre><code>A a=new new A(); a.setI(1990); </code></pre> <p>as you see, there are two instances of class <code>A</code> named <code>a</code> and <code>a1</code>.</p> <pre><code>A a=new A(); A a1=new A(); </code></pre> <p>The <code>a1</code> reference has no value for variable c, so it's <code>null</code>.<br/><br/> class <code>B</code> doesn't have anything(attribute) here.<br/> in class <code>A</code>, the b variable is a array of class <code>B</code>, so <code>a</code> variable has two <code>B</code> references(<code>b0</code>,<code>b1</code>) and a <code>null</code> value.</p> <pre><code>B b0=new B(); B b1=new B(); a.setB(new B[]{b0,b1,null}); //// B b2=new B(); a1.setB(new B[]{null,null,b2}); </code></pre> <p>and about the <code>:C</code> and <code>:Vector&lt;C&gt;</code>, why doesn't it have a name lie <code>a1</code> or <code>b0</code>? because there is no need for pointer(reference) for the class, so it doesn't need a pointer, in other word an object from <code>Vector&lt;&gt;</code> and two objects from <code>C</code> are created and passed to the host class <code>A</code>.</p> <pre><code>a.setC(new Vector&lt;C&gt;()); a.getC().put(new C(a)); a.getC().put(new C(a)); </code></pre> <p>and about the <code>owner</code> in <code>C</code> class, assume that the owner is set during the object creation by constructor, or has set by a indirect reference (using <code>A.c</code>).<br/> <br/> I hope I could give some hand dude. Software: UMLet</p>
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    1. POImplementation of class diagrams of java classes
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    1. COLooks good,is it an direct convertion of the implementation or do you draw the single diagrams with some Tools?
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      1. USJames Rich
    2. COI used UMLet for drawing, not from the source code
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    3. COHow can i create an object diagram with the smallest possible (but not 0) item number,an object diagram with the smallest possible number of objects that contains an object of class A and a object diagram with the smallest possible number of objects that contains an object of class C. Because i dont understand how to create object diagrams with the class diagram you created.
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