Hutool 39

boolean isEmpty = StrUtil.isEmpty("   "); // false
boolean isBlank = StrUtil.isBlank("   "); // true
String fixed = StrUtil.fillBefore("abc", '0', 5); // 00abc
String sub = StrUtil.sub("abcdef", 2, 4); // cd

From sending HTTP requests to generating MD5 hashes, these modules handle infrastructure-level tasks. hutool 39

Now, let’s explore the 39 methods you’ll actually use every week. boolean isEmpty = StrUtil

To use the modern version (Hutool 5.8+), add the following to your project. From sending HTTP requests to generating MD5 hashes,

implementation 'cn.hutool:hutool-all:5.8.26'

Note: Hutool is modular. You can import hutool-core or hutool-http individually if you don't want the whole library.