Trick to sweet pineapple is to smell it. The trick to ripe pineapple is to pull out one of the frons from the top. If it comes out easily its ready!
Using a sharp knife peel and remove eyes and tough fiber. Cube or slice the pineapple and set aside.
Pineapple may be packed in water, apple juice, white grape juice, or in very light, light, or medium syrup.
For the syrup mixture see the combination here. In a large saucepan heat syrup, water, or juice, and simmer for 10 minutes.
Fill hot jars with pineapple pieces and cover with hot cooking liquid, leaving 1/2-inch headspace. Remove air bubbles and adjust headspace if needed.
Wipe rims of jars with a dampened clean paper towel.
Adjust lids and process in a water bath for 15 minutes for pints and 20 minutes for quarts.