数组列表 <String[]> 排序第一个元素

Question

public ArrayList<String[]> customerArray= new ArrayList<String[]>();

The first elements are String type, I want to make them Integer and sorting.

35 Murat Kaya 236-3446789 Address: Dikmen 4. Cadde 34/2
45 Hatice AK 568-8969746 Address: Cebeci 56 cd. 34/5

It is part of this file.

Answer 1

您可以这样实现：

customerArray.sort(Comparator.comparingInt(e -> Integer.parseInt(e[0])));

Answer 2

customerArray.sort((sa1,sa2)->Integer.parseInt(sa1[0])-Integer.parseInt(sa2[0]));