<p>I've seen examples like this: </p>

<pre><code>public class MaxSeconds {
   public static final int MAX_SECONDS = 25;
}
</code></pre>

<p>and supposed that I could have a Constants class to wrap constants in, declaring them static final. I know practically no Java at all and am wondering if this is the best way to create constants.  </p>

That is perfectly acceptable, probably even the standard.
```
```
(public/private) static final TYPE NAME = VALUE;
```
```
where
```
TYPE
```
is the type,
```
NAME
```
is the name in all caps with underscores for spaces, and
```
VALUE
```
is the constant value;
I highly recommend NOT putting your constants in their own classes or interfaces.
As a side note:  Variables that are declared final and are mutable can still be changed; however, the variable can never point at a different object.
For example:
```
```
public static final Point ORIGIN = new Point(0,0);

public static void main(String[] args){

    ORIGIN.x = 3;

}
```
```
That is legal and
```
ORIGIN
```
would then be a point at (3, 0).