For documents whose root element is an HTML HTML element or an XHTML html element [HTML]: if the computed value of background-image on the root element is none and its background-color is transparent, user agents must instead propagate the compute...

看下这个呢：[链接]

jdk是否正确，官网重下试试，java -version看看是否对，环境变量呢参考这个看看呢[链接]

[链接]博客搜

有唯一索引就count(1)好，没有索引 exists好点。优化最好看情况建索引

function uniteBytes(src0, src1) { let b0 = src0.charCodeAt(0); let b1 = src1.charCodeAt(0); let result = (b0 << 4) ^ b1; return result;}

试下呢 {代码...}