Java 小问题

你的理解错误吧，要么就是翻译的不准确。
我一般都喜欢用这种注释/*
func(){
}
//*/因为我只需要在注释的第一行前面加一个/，则可以取消注释，再把/去掉，就可以注释很多行。

没见过这种写法，你可以写上多少也多少行大家一块看看，java编程思想这本书大多数人都有

我学习java那么久，没有见过这样的注释~~

貌似没有这种注释吧,java就三种注释,单行,多行,帮助文档.

Java 编程思想中文版第四版 46页，第二行就是。。
章节是：3.8 逻辑操作符从这一页开始，后面很多的示例代码都使用了这种注释方式。。

没仔细读过 Java编程思想吧
书里面用得很多，我也不知道什么意思。。

看了一下确实如此，以前对thinking java 这写前几章没认真看过，没注意到这个写法，查了些
java语言规范地址，java7中3.7是注释的描述如下，也没有这种写法。3.7. CommentsThere are two kinds of comments./* text */A traditional comment: all the text from the ASCII characters /* to the ASCII characters */ is ignored (as in C and C++).// textAn end-of-line comment: all the text from the ASCII characters // to the end of the line is ignored (as in C++).
Comment:
    TraditionalComment
    EndOfLineCommentTraditionalComment:
    / * CommentTailEndOfLineComment:
    / / CharactersInLineoptCommentTail:
    * CommentTailStar
    NotStar CommentTailCommentTailStar:
    /
    * CommentTailStar
    NotStarNotSlash CommentTailNotStar:
    InputCharacter but not *
    LineTerminatorNotStarNotSlash:
    InputCharacter but not * or /
    LineTerminatorCharactersInLine:
    InputCharacter
    CharactersInLine InputCharacter
These productions imply all of the following properties:Comments do not nest./* and */ have no special meaning in comments that begin with //.// has no special meaning in comments that begin with /* or /**.As a result, the text:/* this comment /* // /** ends here: */
is a single complete comment.The lexical grammar implies that comments do not occur within character literals (§3.10.4) or string literals (§3.10.5).也无从查处，个人猜测跟当时作者的编辑器有关，如果用eclipse的话就不会这么麻烦，直接ctrl+/就可以了。

看了一下确实如此，以前对thinking java 这写前几章没认真看过，没注意到这个写法，查了些
java语言规范地址，java7中3.7是注释的描述如下，也没有这种写法。3.7. CommentsThere are two kinds of comments./* text */A traditional comment: all the text from the ASCII characters /* to the ASCII characters */ is ignored (as in C and C++).// textAn end-of-line comment: all the text from the ASCII characters // to the end of the line is ignored (as in C++).
Comment:
    TraditionalComment
    EndOfLineCommentTraditionalComment:
    / * CommentTailEndOfLineComment:
    / / CharactersInLineoptCommentTail:
    * CommentTailStar
    NotStar CommentTailCommentTailStar:
    /
    * CommentTailStar
    NotStarNotSlash CommentTailNotStar:
    InputCharacter but not *
    LineTerminatorNotStarNotSlash:
    InputCharacter but not * or /
    LineTerminatorCharactersInLine:
    InputCharacter
    CharactersInLine InputCharacter
These productions imply all of the following properties:Comments do not nest./* and */ have no special meaning in comments that begin with //.// has no special meaning in comments that begin with /* or /**.As a result, the text:/* this comment /* // /** ends here: */
is a single complete comment.The lexical grammar implies that comments do not occur within character literals (§3.10.4) or string literals (§3.10.5).也无从查处，个人猜测跟当时作者的编辑器有关，如果用eclipse的话就不会这么麻烦，直接ctrl+/就可以了。无所谓了，貌似不是什么重要的功能。。只是偶然看到了，觉得很奇怪，Google & Baidu都没搜到。。
估计可能是当时作者的特殊习惯：）

我来给个上下文吧：逻辑操作符
int i = rand.nextInt(100);
int j = rand.nextInt(100);
...
print("i != j is " + (i != j));
// Treating an int as a boolean is not legal Java:
//! print("i && j is " + (i && j));
//! print("i || j is " + (i || j));
//! print("!i is " + !i);
print("(i < 10) && (j < 10) is" + ((i < 10) && (j < 10)));
...
“与”、“或”、“非”操作只可应用于布尔值。与在C及C++中不同的是：不可将一个非布尔值当作布尔值在逻辑表达式中使用。在前面的代码中用//!注释掉的语句，就是错误的用法（这种注释语句使得注释能够被自动移除以方便测试）。所以我的理解就是：
1、作者用//!来提醒读者，这语句是错误的；
2、在代码中“注释代码”/“移除注释”，可以很方便的测试代码正确与否。

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