想把builderArray變成字符串使用log.debug("e", builderArray);打印出來，但是為什么無效？

package com.mvc.utils;

import lombok.extern.slf4j.Slf4j;

@Slf4j
public class CommonUtil {

    /**
     * String 字符串常量
     * StringBuffer 字符串變量（線程安全）
     * StringBuilder 字符串變量（非線程安全）
     */
    public static String handleId(String[] idArr) {
        StringBuilder builder = new StringBuilder();
        for (String id : idArr) {
            builder.append("'").append(id).append("'").append(",");
        }
        builder.deleteCharAt(builder.length()-1);
        return builder.toString();
    }

}

package com.mvc;

import com.mvc.utils.CommonUtil;

import lombok.extern.slf4j.Slf4j;

@Slf4j
public class CommonUtilTest {
    public static void main(String[] args) {
        String[] strArray = new String[]{"abc", "bcd", "cty"};
        System.out.println("strArray = " + strArray);

        StringBuilder builderArray = new StringBuilder();

        CommonUtil.handleId(strArray);
        System.out.println("strArray = " + strArray);
    }
}

package com.mvc;

import com.mvc.utils.CommonUtil;

import lombok.extern.slf4j.Slf4j;

@Slf4j
public class CommonUtilTest {
    public static void main(String[] args) {
        String[] strArray = new String[]{"abc", "bcd", "cty"};
       

        StringBuilder builderArray = new StringBuilder();
        log.debug("e", strArray);

        CommonUtil.handleId(strArray);

    }
}

打印不出來啊