The recursive functions are the function which repeats itself in a java program. Here is an example of recursive function that finds the factorial of a number.

public class FactorialExample{
public static long factorial(int n){
if(n <= 1) 
return 1;
else
return n * factorial(n - 1);
}
public static void main(String [] args){
    int num=5;
System.out.println(factorial(num));
}
}