Declaring an instance of a class inside that class
<p>This code shows error at run time:</p>

<pre><code>class Animal {
    Animal object1 = new Animal();

    public static void main(String[] args) {     
        Animal obj = new Animal();
    }
}
</code></pre>

<p>This is slightly different code with <code>Animal obj = new Animal();</code> this line from main 
method commented out. this code shows no run time error. </p>

<pre><code>class Animal {
    Animal object1 = new Animal();

    public static void main(String[] args) {     
        // Animal obj = new Animal();
    }
}
</code></pre>

<p>How is this caused and how can I solve it? I am using command prompt to run this code.</p>
