声明一个包含 Java 数组的 ArrayList

Question

Basically, i created a new class that contains integers and floats and made it into an array so that my array can have more than one data type:

public class LibRecord {
    // values for each libary user
    public int number;
    public int issued;
    public int maxLoans;
    public float fines;
    public String name;       
}

private LibRecord[] item = new LibRecord[maxUsers];

I need to make this into an arraylist so that i can delete,add and insert values and everytime i try to create an ArrayList with the name 'item', the compiler tells me that this name has already been used. What do i do? And how do i get this program to work so that i can call the methods in ArrayList?

Answer 1

As the compiler is clearly telling you, you can't make two fields with the same name.

You need to use different names. (or get rid of the first field)

Answer 2

Just replace your:

private LibRecord[] item = new LibRecord[maxUsers];

with:

private List<LibRecord> users = new ArrayList<LibRecord>(maxUsers);

Answer 3

Make sure that you don't have two variables named item in the same scope.

Or else rename item in private LibRecord[] item = new LibRecord[maxUsers]; to items