METHODS WITH VARARGS
Varargs represents variable-length arguments and it was introduced by JDK -5 (J2SE 5.0), it makes the java code more flexible in terms of dealing with methods. So what are actually varargs? Varagrs are actually used to pass parameters without any limitations through a method, or we can say that they allow us to declare a method with unspecified number of parameters for a given type of argument. So let’s see the basic syntax of varargs in methods.
Syntax:
returnType methodName(Type … arguments){
}
In the above syntax we can notice that after writing the type
of the parameters (inside the parentheses) it is the part of the syntax to put
three periods(.) followed by the arguments (or the name that we could use for
all the parameters. Let’s see an example to understand the implementation.
Ex:
public class Coding_Winds {
static void Students(String ...person){
for(String name: person)
System.out.println("Hello "+name);
}
public static void main(String[] args) {
Students("John", "David", "Suhel");
}
}
Output:
Hello John
Hello David
Hello Suhel
So as seen in the above example we never mentioned the number
of parameters that we passed through the method, now let’s see another example
which would be calling the methods with more or less parameters.
Ex:
public class Coding_Winds {
static void Students(String ...person){
for(String name: person)
System.out.println("Hello "+name);
}
public static void main(String[] args) {
Students("John", "David", "Suhel");
Students("Ollie","Alex");
Students("Shawn");
}
}
Output:
Hello John
Hello David
Hello Suhel
Hello Ollie
Hello Alex
Hello Shawn
Note that the arguments here can be considered as arrays and
we can use the array methods with them.
Ex:
import java.util.*;
public class Coding_Winds {
static void Students(String ...person){
Arrays.sort(person);
System.out.println("No. of students "+person.length);
for(String name: person)
System.out.println("Hello "+name);
}
public static void main(String[] args) {
Students("Andrew", "Brice", "Camron", "David"
, "Erik");
}
}
Output:
Hello Andrew
Hello Brice
Hello Camron
Hello David
Hello Erik
So as we can see that the arrays methods works fine with the
argument in the above example.
Hope you are clear on this topic do read our more articles on JAVA LANGUAGE.
If you still have any doubt on this topic then do come to us via email "sophomoretechs@gmail.com" or via Instagram "@coding.winds".
This article is SUBMITTED By : Pranjal Rai
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