Java Reference
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Now you've got a DataAccess class that will update and load from the database.
But there's no good way to connect it to the plugin yet, so we need to take a
look at that.
Convert Location to String and Back
Before we get much further, we may as well jump in and tackle the conversion
functions for a Location , as we'll need those before we start working on the
stack bits.
Converting a Location to a string is easy: just build a string from each of the
getX() , getY() , and getZ() results using a non-numeric character to separate each
number. You could use spaces, or commas, but I prefer commas (“,”) as that
seems easier to read.
Write a function named locationToString that takes a Location and returns a String .
But now how to go the other way? Given a string that looks like "110,75,220" ,
how can you split it up into three parts, one for each number?
Java to the rescue! In the Java doc under String , you'll find a function named
split ”, which takes a string and splits it up into an array. So if str="110,75,220" ,
then str.split(","); would return an array of three strings, "110", "75", and "220".
Then it's just a matter of using Double.parseDouble(string) to convert each string
into a double. With the doubles, you can create a new Location .
Now you can write a function named stringToLocation that takes a String and
returns a Location .
When you're done, it might resemble this:
private String locationToString(Location loc) {
return loc.getX() + "," +
loc.getY() + "," +
private Location stringToLocation( String str) {
String[] arr = str.split( "," );
double x = Double .parseDouble(arr[0]);
double y = Double .parseDouble(arr[1]);
double z = Double .parseDouble(arr[2]);
return new Location(x, y, z);
Make sure that much compiles, using as usual.
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