Martha's Fruit Salad

ripe peaches, pitted and sliced 1/2-inch thick

ripe plums, pitted and sliced 1/2-inch thick

blueberries

pineapple, peeled, cored, and cut into 1/2-inch wedges

bananas, peeled and sliced 1/4-inch thick

Juice of 2 navel oranges

fresh mint leaves, thinly sliced