let data = $objectWrappers.wrap($arrays.arrayOf($plugins.loadClass("java.lang.String"), "one", null, "three", "four", null))
// 将非空字符串转换为其长度，并添加索引信息, 带索引的非空字符串长度: [0_3, 2_5, 3_4]
data.mapIndexedNotNull((index, word) => {
    if (word != null) {
        return index + "_" + $objectWrappers.wrap(word).count()
    } else {
        return null
    }
}).forEach((it) => {
    $console.log(it)
})