问题
Is there a difference between:
public void main(String args[]) { ... }
and
public void main(String[] args) { ... }
I don't believe so, but I am wondering.
回答1:
Semantically, they are identical. However, I'd recommend using the latter syntax (String[] args) when declaring arrays. The former syntax is there mainly for compatibility with C syntax.
Since String[], as a whole, is the type of the object in Java, it's more consistent and clear not to split it up.
A similar question addresses the [] after method argument list.
回答2:
There's no difference, but putting the brackets after the type (String[]) is the more common practice in Java.
回答3:
No
They are just two style of writting
回答4:
Both of them are absolutely the same. Please refer to Java Language Specification (JLS) to see the syntax used in java.
String[] args or String args[] will create an array (reserves a place in memory)with no size and name args.
Let us Consider:
String [] x;
putting the [] after the name. Why? because it avoids subtle problems like this:-
String x [] , y; //x[] is an array but y is a String
String [] x y ; //two arrays x[] and y[] both
回答5:
The method signature is the same so there is no difference.
Its a public method, it returns nothing, the method name is "main" and the it takes a String array.
回答6:
Although both are used to create array of String type but second one is more popular, because with that, you can create multiple String arrays simultaneously... E.g String[] a,b;
Here you have created two String Arrays a and b simultaneously.
However
String a[],b; will create String array "a" and String variable(not array) b.
Hope this clarifies.
回答7:
Nope. There is no difference b/w the two.
See Declaring a Variable to Refer to an Array section in this doc. From that doc
float anArrayOfFloats[]; // this form is discouraged
so just use the second style.
回答8:
The difference between these is that when we try to call the main method manually from one class to another by using static syntax , we use "string[] s ". At that point we have to pass an array of string type as argument in main method. When we are using "String... s" then there is no need to pass any string array as an argument. It will run and it doesn't matter if you pass the array as an argument or not (if you don't explicitly pass it, it is passed by itself) ... hence proved/////////
回答9:
there is a difference: For example if you write int[] arr; - here arr is the reference to the integer array whereas in case of int arr[]; - arr is a primitive int type array
来源：https://stackoverflow.com/questions/5997235/is-there-a-difference-between-mainstring-args-and-mainstring-args