Create list with different objects

Question

I have a method that takes in a List<> and adds all the numbers in the list together and returns if the number is = 100

My problem is that I want to use the same method for a number of different types of lists

So instead of having this

public boolean checkPercent(List<BarStaff> associates){..same..}
public boolean checkPercent(List<Waiters> associates){..same..}
public boolean checkPercent(List<KitchenStaff> associates){..same..} 

I want to have this

public boolean checkPercent(List<could be any type> associates){..same..} 

Instead of reusing the same code just of different lists, is there a way to use the same code for all the different types of lists (the staff have the same values in them so they are not different in any way)?

Answer 1

You could use a parameterized method :

public <T> boolean checkPercent(List<T> associates)
{
    // snip...
}

or just accept any list :

public boolean checkPercent(List<?> associates)
{
    // snip...
}

Answer 2

You may create a generic method :

public <T> boolean checkPercent(List<T> associates) {
    ... your code ...
}

Answer 3

使用泛型：

public <T> boolean checkPercent(List<T> associates){...}

Answer 4

The object-oriented approach would be to have BarStaff , Waiters , and KitchenStaff implement a Employee interface that has a method public int getPercentage() .

public boolean checkPercent(List<? extends Employee> associates)
{
    foreach (Employee associate in associates)
    {
        int i = associate.getPercentage();
        // rest of code.
    }
}