Place 8 jam jars in a oven at 250F to heat up (to sterilize).
Put the fruit and water in a large pot and simmer until tender.
Add the sugar and continue to simmer, stirring slowly until all the sugar is dissolved. Boil rapidly until setting point is reached*.
Ladle jam into the hot jars (use a large mouth funnel), and fill to just before top. Cover with jar lids that have been prepared as per directions.
Allow to cool completely before storing.
Notes
*This is 220°F measured with a sugar thermometer. Or can test putting a few drops of jam on counter and let cool. Push the cooled jam with a finger. If a skin crinkles on top of the cooled jam then setting point is reached.