What's the difference between using parameters and no parameters in brackets of a method
<p>What's the difference between:</p>

<p>1)</p>

<pre><code>public void Angle(double f_angle) 
{
    if (f_angle &lt;= 15 &amp;&amp; f_Angle &gt;= -15)
    {
        fAngle = 1000 * f_Angle * Math.PI / 180000;
    } else
        system.out.println("Firing Angle: " + f_Angle + " is not between -15 and 15.");
</code></pre>

<p><strong>AND</strong></p>

<p>2)</p>

<pre><code>public static int f_angle

public void Angle() 
{ ;
    if (f_angle &lt;= 15 &amp;&amp; f_Angle &gt;= -15)
    {
        fAngle = 1000 * f_Angle * Math.PI / 180000;
    } else
        system.out.println("Firing Angle: " + f_Angle + " is not between -15 and 15.");
</code></pre>
