let words = $objectWrappers.wrap($arrays.arrayOf($plugins.loadClass("java.lang.String"), "hello", "world", "kotlin", "android"))
// 按单词长度分组
let wordsByLength = words.groupBy(((it) => $objectWrappers.wrap(it).count()), (it) => it)
// 输出：按长度分组的单词: {5=[hello, world], 6=[kotlin], 7=[android]}
$console.log("按长度分组的单词: ", wordsByLength)