在Java源代码上运行Ant构建时遇到以下错误：
[javac] /home/path/to/my/java/function/VarStatusLog.java:28: error: no suitable method found for sort(List<VarStatusMsg<? extends Number>>)
[javac] Collections.sort(logMsg);
[javac] ^
[javac] method Collections.<T#1>sort(List<T#1>) is not applicable
[javac] (inference variable T#1 has incompatible bounds
[javac] equality constraints: VarStatusMsg<? extends Number>
[javac] upper bounds: VarStatusMsg<CAP#1>,Comparable<? super T#1>)
[javac] method Collections.<T#2>sort(List<T#2>,Comparator<? super T#2>) is not applicable
[javac] (cannot infer type-variable(s) T#2
[javac] (actual and formal argument lists differ in length))
[javac] where T#1,T#2 are type-variables:
[javac] T#1 extends Comparable<? super T#1> declared in method <T#1>sort(List<T#1>)
[javac] T#2 extends Object declared in method <T#2>sort(List<T#2>,Comparator<? super T#2>)
[javac] where CAP#1 is a fresh type-variable:
[javac] CAP#1 extends Number from capture of ? extends Number
我在我的Ant版本中使用JDK 1.8。请注意，Windows上的Eclipse不会引发错误，但是当我从Linux上的命令行运行时，会出现错误。有人可以帮助我吗？提前致谢！
最佳答案
我会说VarStatusMsg没有实现接口Comparable<VarStatusMsg>。您正在使用的sort方法的签名是public static <T extends Comparable<? super T>> void sort(List<T> list)。使您的VarStatusMsg实现接口Comparable<VarStatusMsg>，或给Comparator<VarStatusMsg>作为sort的第二个参数。
顺便说一句。您可以简单地调用logMsg.sort(null)代替Collections.sort(logMsg)或logMsg.sort(myNiceComparator)代替Collections.sort(logMsg, myNiceComparator)。如今，Collections方法仅委托给List。
关于java - “找不到合适的排序方法(List <VarStatusMsg <？扩展Number >>)” JDK错误，我们在Stack Overflow上找到一个类似的问题：https://stackoverflow.com/questions/37141029/