如何阻止Java自动将char值转换为int? [英] How to stop Java from automatically casting a char value to an int?

问题描述

java编译器会自动将char值转换为int，这样的代码不会引发错误:

the java compiler automatically casts a char value into a int, code like this will not raise an error:

public void foo(int i){
   // do something
}

char c = 'a';
foo(c);

是否有某种方法可以阻止编译器始终将char强制转换为int或引发错误?

Is there some way to stop the compiler from always casting chars to int or to throw an error?

推荐答案

默认情况下，编译器会针对提到的

By default, compiler does widening conversion for primitive types mentioned https://docs.oracle.com/javase/specs/jls/se8/html/jls-5.html#jls-5.1.2.

因此，它会自动将char转换为int.

So, it automatically converts char to int.

您可以通过在foo中使用Integer来避免这种情况. void foo(Integer i)

You can avoid it by using Integer in foo. void foo(Integer i)

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