Java - List of objects. Find object(s) with a certain value in a field

问题

I have two lists of objects. The objects in each list are different subclasses of the same class.

I want to look at objects in list One, check the value of a particular field, and then see if there is/are any objects in list Two that have the same field value. What would be the best way to do this?

回答1:

I believe this is more correct. This is the simplest, easiest solution to implement.

for(TypeA itemA : listA) {
    for(TypeB itemB : listB) {
        if(itemA.field == ItemB.otherField) {
            //Do Whatever
        }
    }
}

来源：https://stackoverflow.com/questions/11477195/java-list-of-objects-find-objects-with-a-certain-value-in-a-field