比较器使用我的类的String字段进行比较? [英] Comparator using a String field of my class for comparison?

问题描述

我有一个类型为A的对象列表，并且必须对它的类型为String的A字段进行排序.

I have a list of objects of type A, and I have to order it for a field of A, which is of type String.

public class A{
    public String field1;
    public Integer field2;
    ...
}

如果我必须订购int字段，则会这样做:

If I had to order for the int field would have done so:

Collections.sort(listOfA, new Comparator<A>() {
        public int compare(A p1, A p2) {
            return p1.field2 - p2.field2);
            }
        });

但不幸的是，需要按String类型的字段进行排序.

But unfortunately need to order by the field of type String.

我该怎么做?

推荐答案

    public int compare(A p1, A p2) {
        return p1.field2.compareTo( p2.field2) );
        }

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