jls_开发者

Java casting: is the compiler wrong, or is the language spec wrong, or am I wrong?

I have been reading the Java Language Spec, 3rd edition, and have found what I think is a discrepancy between the spec and the javac compiler implementation. The same discrepancies exist in the Eclips[详细]

2023-02-18 02:15 分类：问答

Why doesn't a Java constant divided by zero produce compile time error? [duplicate]

This question already has answers here: Closed 12 years ago. Possible Duplicate: Is 1/0 a legal Java expression?[详细]

2023-02-10 07:30 分类：问答

Why Java methods with varargs identified as transient?

I was playing with Java Reflection API and observed that methods with variadic argument list become transient. Why is that and what does transient keyword mean in this context?[详细]

2023-02-09 21:17 分类：问答

What is the drawback of having more instances of enum type other than in the enum declaration?

It is a compile-time error to attempt to explicitly instantiate an enum type (§15.9.1). The final clone method in Enum ensures that enum constants can never be cloned, and the special treatment by t[详细]

2023-02-07 14:27 分类：问答

In Java, can a method/constructor declaration appear inside another method/constructor declaration?

In Java, can a method/constructor declaration appear inside another method/constructor declaration? Example:[详细]

2023-02-05 06:28 分类：问答

Cases where the imports in Java aren't needed (unusual qualification) [Question Edited]

I\'ve noticed there are some special ways to qualify an entity in Java: Object o = new Outer().new Inner();[详细]

2023-02-04 19:07 分类：问答

In Java, why can't I write i++++ or (i++)++?

When I try to write a postfix/prefix in/decrement, followed by a post/prefix in/decrement, I get the following error: Invalid argument to operation ++/--.[详细]

2023-02-04 13:21 分类：问答

Java "fresh type variable"

What does \"fresh type variable\" mean in the JLS Co开发者_如何学JAVAnversions and Promotions chapter? Fresh is the common designation for a variable that must not have been used before.[详细]

2023-01-16 07:33 分类：问答

Are subcontexts in Java separate rows on the stack?

In Java this is the case: public void method() { if (condition) { Object x = ....; } System.out.println(x); // Error: x unavailable[详细]

2023-01-04 00:10 分类：问答

Are there any guarantees in JLS about order of execution static initialization blocks?

I wonder if it\'s reliable to use a construction like: private static final Map<String, String> engMessages;[详细]

2023-01-03 10:01 分类：问答

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