求问大神，这段JS函数在java里面用ScriptEngine执行会报错，是为什么？

Question

 var 1 = function() {
var _5d = [function(_1l) {
return _1l
}, function(_5d) {
return _5d
}, function(_1l) {
for (var _5d = 0; _5d < _1l.length; _5d++) {
_1l[_5d] = parseInt(_1l[_5d]).toString(36)
};
return _1l.join('')
}],
_1l = [(((+!) << (+!)) - ~ - ~~~ [] + (-~ - ~~~ [] ^ -~ {}) + []), (-~ {} + []) + (-~ {} + []), (-~ {} + []) + [-~ - ~~~ [] + (-~ - ~~~ [] ^ -~ {})], (-~ {} + []) + (-~ [-~ - ~~~ []] + [] + []), (-~ [(-~ [] + [(-~!{} << -~~~ [] - ~~~ [])] >> -~ [])] + [] + [
[]
][0]), [-~ {} + [~~''] - (-~ {})], (-~ [-~ - ~~~ []] + [] + []), (-~~~ [] - ~~~ [] + [] + [
[]
][0]), (-~ {} + []), (-~ {} + []) + (-~~~ [] - ~~~ [] + [] + [
[]
][0]), (~~ {} + [] + [
[]
][0]), [-~ - ~~~ [] + (-~ - ~~~ [] ^ -~ {})],
[(-~ [] | -~ - ~~~ []) + (-~ [] | -~ - ~~~ [])], (-~ {} + []) + (~~ {} + [] + [
[]
][0]), [(+!) + (2 ^ -~ {})], (-~ {} + []) + [(+!) + (2 ^ -~ {})]
];
for (var _3b = 0; _3b < _1l.length; _3b++) {
_1l[_3b] = _5d[[1, 0, 1, 0, 1, 0, 1, 2, 0, 1, 2, 1, 0, 1, 0, 1][_3b]]([
[(-~~~ [] - ~~~ [] + [] + [
[]
][0]) + [(-~ [] | -~ - ~~~ []) + (-~ [] | -~ - ~~~ [])]],
[-~ - ~~~ [] + (-~ - ~~~ [] ^ -~ {})],
[(-~~~ [] - ~~~ [] + [] + [
[]
][0]) + [(-~ [] | -~ - ~~~ []) + (-~ [] | -~ - ~~~ [])]], 'Y', (-~ [-~ - ~~~ []] + [] + []), 'bMkfVLALp', (-~ [(-~ [] + [(-~!{} << -~~~ [] - ~~~ [])] >> -~ [])] + [] + [
[]
][0]), '%', 'I', [-~ {} + [~~''] - (-~ {})], 'qc%', (-~~~ [] - ~~~ [] + [] + [
[]
][0]), '%2BW', (-~ [(-~ [] + [(-~!{} << -~~~ [] - ~~~ [])] >> -~ [])] + [] + [
[]
][0]), 'D', 'FRRJ%2FV'][_1l[_3b]])
};
return _1l.join('')
}

报错信息：Caused by: jdk.nashorn.internal.runtime.ParserException: :1:4 Expected ident but found 1

Answer 1

var 1 =这个什么鬼，数字明显不能做变量名了。。不错都难