Java 中将字符串数组转换为字符串

Java 中将字符串数组转换为字符串

import java.util.Arrays;
import java.util.HashSet;
import java.util.Set;

public class Test {
    public static void main(String[] args) {
        String[] str1 = {"Geeks", "ForGeeks", "GeeksForGeeks"};
        String[] str2 = {"G", "e", "e", "k", "s"};
        System.out.println(convertArrayToString(str1));
        System.out.println(convertArrayToString(str2));

        Set<String> set = new HashSet<>(Arrays.asList(str1));
        System.out.println(String.join(",", set));
    }

    public static String convertArrayToString(String[] strArr) {
        if (strArr == null || strArr.length == 0) {
            return "";
        }
        String res = "";
        for (int i = 0, len = strArr.length; i < len; i++) {
            res += strArr[i];
            if (i < len - 1) {
                res += ",";
            }
        }
        return res;
    }
}

Geeks,ForGeeks,GeeksForGeeks

G,e,e,k,s

ForGeeks,Geeks,GeeksForGeeks