Sky*_*sis 5 java generics interface exception throws
我想定义一个界面,比如
public interface Visitor <ArgType, ResultType, SelfDefinedException> {
public ResultType visitProgram(Program prog, ArgType arg) throws SelfDefinedException;
//...
}
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在实现过程中,selfDefinedException会有所不同.(selfDefinedException为现在的通用undefined)有没有办法做到这一点?
谢谢
Jon*_*eet 11
您只需要将异常类型约束为适合抛出.例如:
interface Visitor<ArgType, ResultType, ExceptionType extends Throwable> {
ResultType visitProgram(String prog, ArgType arg) throws ExceptionType;
}
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也许:
interface Visitor<ArgType, ResultType, ExceptionType extends Exception> {
ResultType visitProgram(String prog, ArgType arg) throws ExceptionType;
}
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您的通用参数需要扩展Throwable.像这样的东西:
public class Weird<K, V, E extends Throwable> {
public void someMethod(K k, V v) throws E {
return;
}
}
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