Java如何在大写字符串之前对小写进行排序 [英] Java how to sort lowercase before uppercase strings

问题描述

我希望文件按其abs路径名排序，但我希望小写字母在大写之前排序。示例：假设我有4个文件：

I want the files to be ordered by their abs path name, but I want the lowercase to be sorted before the uppercase. Example: Let's say I got 4 files:

files2.add("b");
files2.add("A");
files2.add("a");
files2.add("B");

此代码的订单为：[A，B，a，b]
I希望它是：[a，A，b，B]

the order with this code is: [A, B, a, b] I want it to be: [a, A, b, B]

import java.io.File;
import java.util.*;

public class Abs {

    public ArrayList<File> getOrder(ArrayList<File> files) {
        Collections.sort(files, new Comparator<File>() {
            public int compare(File file1, File file2) {
                return file1.getAbsolutePath().compareTo(file2.getAbsolutePath());
            }
        });
        return files;
    }

}

推荐答案

检查 Collat​​or类。

你必须仔细阅读这些常量的含义，但其中一个应该可以让你在大写字母之前加上小写字母。

You'll have to read carefully what those constants mean, but one of them should make it possible for you to put lowercase letters before the upper-case letters.

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