Comparable<>和compareTo方法A-Z和Z-A

Question

有没有办法对调用相同compareTo override method的A到Z和Z到A这两种方式的String进行排序

@Override
    public int compareTo(Historial o) {
        String a = this.getName();
        String b = o.getName();


        return a.compareTo(b);//This sorts A-Z
    }

Answer 1

只需替换变量的名称即可

return a.compareTo(b);//This sorts A-Z
return b.compareTo(a);//This sorts Z-A