Java中的运算符(Java in operator)

 第100万次，我希望在Java中使用IN运算符，类似于SQL中的IN运算符。 它可以被实现为编译器语法糖。 所以这 
 
if (value in (a, b, c)) {
}
else if (value in (d, e)) {
}
 
 ...真的很棒。 事实上，上面的内容与这里的相当冗长（并且不适用于基元）结构相同： 
 
if (Arrays.asList(a, b, c).contains(value)) {
}
else if (Arrays.asList(d, e).contains(value)) {
}
 
 或者像int ， long和类似的类型： 
 
switch (value) {
  case a:
  case b:
  case c:
    // ..
    break;

  case d:
  case e:
    // ..
    break;
 }
 
 或者可能会有更高效的实现。 
 
 题： 
 
 像这样的东西会成为Java 8的一部分吗？ 如果不是，我该如何提出这样的建议？ 或者有没有我现在可以使用的同等构造？ 

For the one millionth time, I would have liked to use an IN operator in Java, similar to the IN operator in SQL. It could just be implemented as compiler syntactic sugar. So this
 
if (value in (a, b, c)) {
}
else if (value in (d, e)) {
}
 
...would really be awesome. In fact, the above is the same as the rather verbose (and not adapted for primitives) construct here:
 
if (Arrays.asList(a, b, c).contains(value)) {
}
else if (Arrays.asList(d, e).contains(value)) {
}
 
Or like this for int, long and similar types:
 
switch (value) {
  case a:
  case b:
  case c:
    // ..
    break;

  case d:
  case e:
    // ..
    break;
 }
 
Or maybe there could be even more efficient implementations. 
 
Question:
 
Is something like this going to be part of Java 8? How can I make such a suggestion, if not? Or is there any equivalent construct that I could use right now?

原文：https://stackoverflow.com/questions/7390571