为什么Java不抱怨保留字Float？

Question

I entered this in Eclipse and expected it to be the wrong syntax but it is allowed. Can someone please explain what is happening here? Should the Float and Integer keyword not be reserved? What type of assignment is this?

Number Float = 99.455f;
Number Integer = 2;

Answer 1

No, Float is not reserved word. float is reserved word. Here is list of reserved words in java

Answer 2

You are creating a variable with the name Float . That's all. It's not a reserved word. The compiler is not trying to interpret it as a class name due to the syntax of your statement. It's not invalid, even if it is bad form.

Answer 3

因为这不是保留的，所以它是自动装箱的。

Answer 4

Float（它是一个包装类）不是Java保留关键字，而是float（它是一个原始的）。

Answer 5

Java区分大小写， float是保留关键字但Float不是。

Answer 6

Float is not a reserved word. It is just a name of java.lang.Float class, and system library class names (even from java.lang ) are not reserved. float is a reserved word. You can also have

int String = 1;

but I would not advise.

Answer 7

How about these , these also compile. No deference from Float or Integer which are no reserved key words but Class names

            String String = "";
            Math Math = null;
            Object Object = null;