let words = $objectWrappers.wrap($arrays.arrayOf($plugins.loadClass("java.lang.String"), "hello", "world", "kotlin"))
// 从右到左连接所有单词，并添加索引信息
let joinedString = words.foldRightIndexed("", (index, word, acc) =>
    acc + index + "_" + word + " "
)
// 输出：连接后的字符串: 2_kotlin 1_world 0_hello
$console.log("连接后的字符串: ", joinedString)