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  • The main method calls the method printMax ; the actual parameters are two integer literals.
  • The activation record for printMax is allocated, and the actual parameters are used to initialize the formal parameters a and b .
  • The variable max is allocated but not initialized.
  • The method maximum is called; the actual parameters are the values of a and b , which are the formal variables of method printMax .
  • An activation record is allocated for maximum . (There are now three activation in the stack.) The new activation record includesmemory for the formal parameters a and b ; note that these are new parameters not at all related to the formal parameters of the same namesin the previous method printMax because those parameters are hidden.
  • The method maximum executes its body and returns a value. Just before it returns, select the tab Call Tree above the graphic display; the sequence of calls from main to printMax and then maximum is displayed. Select Theater to return to the animated display.
  • When the method returns, its activation record is deallocated, uncovering the activation record of printMax .
  • The value returned is assigned to the variable max and printed.
  • When printMax completes its execution, its activation record is deallocated.

Note: In a call to a static method, the name of the class in which it is defined can be given as in the call to maximum . Since the method is defined in the same class as the call,the class name need not be given, as shown in the call to printMax .

Exercise Write a program to compute the maximum of six values using as few statements as possible.

Recursion

Concept Recursion occurs when method calls itself. There is nothing at all mysterious about recursion!Each call simply creates a new activation record on the stack. However, to ensure that the recursive calls terminate,eventually, some call of the method should return without invoking itself once again.

Program: Method04.java

// Learning Object Method04 //    recursionpublic class Method04 {     static int factorial (int n) {        if (n <= 1)             return 1;        else             return n * factorial(n-1);    }      public static void main(/*String[] args*/) {        System.out.println(factorial(5));     }}

The standard example of a recursive method is one that computes the factorial function:

n ! = n · ( n - 1 ) · · 2 · 1 = n · ( n - 1 ) !

The recursion is terminated by defining n ! = 1 for n 1 .

  • The main method calls the method factorial with the actual parameter 5. This creates an activation record with the formal parameter n initialized to 5.
  • To compute the expression in the second return statement, the method factorial is called again, this time with the actual parameter equal to 5 - 1 = 4 .
  • The sequence of recursive calls continues five times, each one allocating a new activation record with a new variable n .
  • Finally, factorial is called with actual parameter 1. This call creates a new activation record as usual, but does notcause factorial to be invoked again. Instead, the value 1 is returned and the activation record is deallocated.Just before the method returns, select the tab Call Tree above the graphic display; the sequence of calls from main to the sequence of recursive calls is displayed. Select Theater to return to the animated display.
  • The recursive sequence unfolds : each returned value is used to compute a new value to be returned by that call of factorial .
  • Finally, the value 120 is returned to the main method and printed.

Questions & Answers

can someone help me with some logarithmic and exponential equations.
Jeffrey Reply
sure. what is your question?
ninjadapaul
20/(×-6^2)
Salomon
okay, so you have 6 raised to the power of 2. what is that part of your answer
ninjadapaul
I don't understand what the A with approx sign and the boxed x mean
ninjadapaul
it think it's written 20/(X-6)^2 so it's 20 divided by X-6 squared
Salomon
I'm not sure why it wrote it the other way
Salomon
I got X =-6
Salomon
ok. so take the square root of both sides, now you have plus or minus the square root of 20= x-6
ninjadapaul
oops. ignore that.
ninjadapaul
so you not have an equal sign anywhere in the original equation?
ninjadapaul
Commplementary angles
Idrissa Reply
hello
Sherica
im all ears I need to learn
Sherica
right! what he said ⤴⤴⤴
Tamia
what is a good calculator for all algebra; would a Casio fx 260 work with all algebra equations? please name the cheapest, thanks.
Kevin Reply
a perfect square v²+2v+_
Dearan Reply
kkk nice
Abdirahman Reply
algebra 2 Inequalities:If equation 2 = 0 it is an open set?
Kim Reply
or infinite solutions?
Kim
The answer is neither. The function, 2 = 0 cannot exist. Hence, the function is undefined.
Al
y=10×
Embra Reply
if |A| not equal to 0 and order of A is n prove that adj (adj A = |A|
Nancy Reply
rolling four fair dice and getting an even number an all four dice
ramon Reply
Kristine 2*2*2=8
Bridget Reply
Differences Between Laspeyres and Paasche Indices
Emedobi Reply
No. 7x -4y is simplified from 4x + (3y + 3x) -7y
Mary Reply
is it 3×y ?
Joan Reply
J, combine like terms 7x-4y
Bridget Reply
im not good at math so would this help me
Rachael Reply
yes
Asali
I'm not good at math so would you help me
Samantha
what is the problem that i will help you to self with?
Asali
how do you translate this in Algebraic Expressions
linda Reply
Need to simplify the expresin. 3/7 (x+y)-1/7 (x-1)=
Crystal Reply
. After 3 months on a diet, Lisa had lost 12% of her original weight. She lost 21 pounds. What was Lisa's original weight?
Chris Reply
what's the easiest and fastest way to the synthesize AgNP?
Damian Reply
China
Cied
types of nano material
abeetha Reply
I start with an easy one. carbon nanotubes woven into a long filament like a string
Porter
many many of nanotubes
Porter
what is the k.e before it land
Yasmin
what is the function of carbon nanotubes?
Cesar
what is nanomaterials​ and their applications of sensors.
Ramkumar Reply
what is nano technology
Sravani Reply
what is system testing?
AMJAD
preparation of nanomaterial
Victor Reply
Yes, Nanotechnology has a very fast field of applications and their is always something new to do with it...
Himanshu Reply
good afternoon madam
AMJAD
what is system testing
AMJAD
what is the application of nanotechnology?
Stotaw
In this morden time nanotechnology used in many field . 1-Electronics-manufacturad IC ,RAM,MRAM,solar panel etc 2-Helth and Medical-Nanomedicine,Drug Dilivery for cancer treatment etc 3- Atomobile -MEMS, Coating on car etc. and may other field for details you can check at Google
Azam
anybody can imagine what will be happen after 100 years from now in nano tech world
Prasenjit
after 100 year this will be not nanotechnology maybe this technology name will be change . maybe aftet 100 year . we work on electron lable practically about its properties and behaviour by the different instruments
Azam
name doesn't matter , whatever it will be change... I'm taking about effect on circumstances of the microscopic world
Prasenjit
how hard could it be to apply nanotechnology against viral infections such HIV or Ebola?
Damian
silver nanoparticles could handle the job?
Damian
not now but maybe in future only AgNP maybe any other nanomaterials
Azam
can nanotechnology change the direction of the face of the world
Prasenjit Reply
At high concentrations (>0.01 M), the relation between absorptivity coefficient and absorbance is no longer linear. This is due to the electrostatic interactions between the quantum dots in close proximity. If the concentration of the solution is high, another effect that is seen is the scattering of light from the large number of quantum dots. This assumption only works at low concentrations of the analyte. Presence of stray light.
Ali Reply
the Beer law works very well for dilute solutions but fails for very high concentrations. why?
bamidele Reply
how did you get the value of 2000N.What calculations are needed to arrive at it
Smarajit Reply
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Source:  OpenStax, Learning objects for java (with jeliot). OpenStax CNX. Dec 28, 2009 Download for free at http://cnx.org/content/col10915/1.2
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