如何把char数组转换成String

  public String reverseStr(String s) {
        int left = 0, right = s.length() - 1;
        char[] chs = s.toCharArray();
        System.out.println(chs);
        while (left < right) {
            char temp = chs[right];
            chs[right] = chs[left];
            chs[left] = temp;
            left++;
            right--;
        }
        return chs.toString();
    }

//无空格，无括号
String s3 = StringUtils.join(arr,",");
System.err.println(s3);//41,a,5,g56

public static void main(String[] args) {
//有空格和括号
String [] arr = {“41”,“a”,“5”,“g56”};
String s1 = Arrays.toString(arr);
System.err.println(s1);//[41, a, 5, g56]
//无空格，无括号，无逗号
String s2 = StringUtils.join(arr);
System.err.println(s2);//41a5g56

//无空格，无括号，无逗号
StringBuffer s4 = new StringBuffer();
for (String string : arr) {
s4.append(string);
}
System.err.println(s4.toString());//41a5g56
}

String s = "Rita  Love     code"

String [] arr = str.split("\\s+");
for(String ss : arr){
    System.out.println(ss);
}

String[] arr2 = str.split(" ");
for (String ss : arr2) {
    System.out.println(ss);
}