下面这段代码是啥意思，求指导

Question

com.alibaba.fastjson.JSON类中的一段代码，求大神指导这个是啥意思

 public abstract class JSON implements JSONStreamAware, JSONAware {

    //.....

  //这个static下面的代码是干啥的？
  static {
        int features = 0;
        features |= Feature.AutoCloseSource.getMask();
        features |= Feature.InternFieldNames.getMask();
        features |= Feature.UseBigDecimal.getMask();
        features |= Feature.AllowUnQuotedFieldNames.getMask();
        features |= Feature.AllowSingleQuotes.getMask();
        features |= Feature.AllowArbitraryCommas.getMask();
        features |= Feature.SortFeidFastMatch.getMask();
        features |= Feature.IgnoreNotMatch.getMask();
        DEFAULT_PARSER_FEATURE = features;
    }

 

Answer 1

默认转换的属性， |=按位或赋值

Answer 2

和linux那个权限可读可写可执行同一类型的么？

Answer 3

回复
原理类似

Answer 4

|= // 按位或操作

经过上边的操作  features 的二进制值就表示了上述所有状态，这个是节省空间，快速判断当前特性的操作。