why cannot use "this" in the main method?
<pre><code>   public class example {

    int a = 0;

    public void m() {
        int b = this.a;
    }

    public static void main(String[] args) {
        int c = this.a;
    }

}
</code></pre>

<p>I am new in java. Why I cannot use "this" in the main method?</p>
