What is the variable parameter of Java
This article mainly explains "what is the variable parameter of Java". The content of the explanation is simple and clear, and it is easy to learn and understand. Please follow the editor's train of thought to study and learn "what is the variable parameter of Java".
What is a variable parameter?
That is, the method parameters are Object.... In the form of three points of args, one parameter can receive multiple parameters.
The actual code will not be posted. Let's take a look at this example:
Example 1
Public static void main (String [] args) {
Test ("name=%s&memo=%s", "Java technology stack", "666")
}
Private static void test (String text, Object... Params) {
String result = String.format (text, params)
System.out.println (result)
}
Guess what the result is? As a result, as we imagined:
Name=Java Technology Stack & memo=666
Example 2
Public static void main (String [] args) {
Test ("name=%s&memo=%s", "Java technology stack")
}
Private static void test (String text, Object... Params) {
String result = String.format (text, params, "666")
System.out.println (result)
}
I moved "666" into the submethod, put it at the end of the format, and then see what the result is.
Name= [Ljava.lang.Object;@4cb2c100&memo=666] Thank you for your reading, the above is the content of "what is the variable parameter of Java". After the study of this article, I believe you have a deeper understanding of what the variable parameter of Java is, and the specific use needs to be verified in practice. Here is, the editor will push for you more related knowledge points of the article, welcome to follow!
