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Source code for above classes


package view; import java.awt.*; // to use Container.import java.awt.event.*; // to use WindowAdpater and WindowEvent. import javax.swing.*; // to use JFrame./** * A subclass of AFrame containing two JButtons that have event handler called* "commands" to dynamically switch layout managers when the buttons are clicked * upon.* @author D.X. Nguyen */public class Frame2 extends AFrame { public Frame2(String title) {super(title); }protected void initialize() { Container cp = getContentPane();cp.setLayout(new FlowLayout());JButton jb1 = new JButton("Grid Layout"); JButton jb2 = new JButton("Flow Layout");cp.add(jb1); cp.add(jb2);pack(); /*** Registers an anonymous event handler for the clicking of button jb1. * When jb1 is clicked upon, this event handler will respond by* executing its actionPerformed(...) method. */jb1.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) {jb1Clicked(e); }}); /*** Same as the above. */jb2.addActionListener(new ActionListener() { public void actionPerformed(ActionEvent e) {jb2Clicked(e); }}); }/** * Dynamically changes to a GridLayout with 2 rows and 1 column.*/ protected void jb1Clicked(ActionEvent e) {System.out.println("Set GridLayout..."); getContentPane().setLayout(new GridLayout(2,1));validate(); // forces this frame to re-layout. }/** * Dynamically changes to FlowLayout.*/ protected void jb2Clicked(ActionEvent e) {System.out.println("Set FlowLayout..."); getContentPane().setLayout(new FlowLayout());validate(); // forces this frame to re-layout. }}


package app; import javax.swing.*;import view.*; public class Frame2App {public static void main(String[] args) {JFrame f = new Frame2("A JFrame with 2 JButtons with event listeners"); f.setVisible(true);f.setSize(300, 100); // Guess what this does! f.setLocation(200, 200); // Guess what this does!// Forces the frame to re-layout its components: f.validate();} }


package view; import java.awt.*;import java.awt.event.*; import javax.swing.*;/** * Same functionality as Frame2 but uses an adapter interface to communicate* with the outside world instead. This design allows varying the communication * with the outside world. How the outside world reacts to the events that* happen to the view is a variant behavior! * Uses the Null-Object Pattern to initialize the adapter avoiding checking for* null. * @author DXN*/ public class Frame3 extends Frame2 {// Initializes the adapter to a null object: private IView2World _v2wAdapter = new IView2World() {public Object button1Clicked (ActionEvent e) { return null; // does nothing!} public Object button2Clicked (ActionEvent e) {return null; // does nothing! }}; public Frame3(String title) {super(title); }public void setV2WAdapter(IView2World v2w) { if (null == v2w) {throw new IllegalArgumentException("Argument cannot be null!"); }_v2wAdapter = v2w; }/** * Tells _v2wAdapter the button click event happens on jb1.*/ protected void jb1Clicked(ActionEvent e) {_v2wAdapter.button1Clicked(e); }/** * Tells _v2wAdapter the button click event happens on jb2.*/ protected void jb2Clicked(ActionEvent e) {_v2wAdapter.button2Clicked(e); }}


package view; import java.awt.event.*;/** * Adapter connecting Frame3 (the View) to the outside world.*/ public interface IView2World {/** * Called by Frame3 when its button 1 is clicked.*/ public Object button1Clicked (ActionEvent e);/** * Called by Frame3 when its button 2 is clicked.*/ public Object button2Clicked (ActionEvent e);}


package controller; import view.*;import java.awt.event.*; import javax.swing.JFrame;import java.awt.*; // For layout managers. /*** The controller that instantiates a concrete IView2World object and connects * the world outside of Frame3 (the view) to Frame3.* The concrete adapter is implemented as an anonymous inner classe. */public class Frame3Controller { public JFrame constructFrame() {// Local variable needs to be final so that the local inner class // can access it:final Frame3 frame = new Frame3("View and Controller"); /*** Install as concrete anonymous IView2World adapter in frame, without * frame knowing what the adapter does.*/ frame.setV2WAdapter(new IView2World() {public Object button1Clicked (ActionEvent e) { frame.getContentPane().setLayout(new GridLayout(2,1));frame.validate(); return null;} public Object button2Clicked (ActionEvent e) {frame.getContentPane().setLayout(new FlowLayout()); frame.validate();return null; }}); frame.setVisible(true);return frame; }}


package app; import view.*;import controller.*; /*** Instantiates the controller and builds the frame! */public class Frame3App { public static void main(String[]args) { new Frame3Controller().constructFrame().validate();} }

Questions & Answers

find the 15th term of the geometric sequince whose first is 18 and last term of 387
Jerwin Reply
I know this work
The given of f(x=x-2. then what is the value of this f(3) 5f(x+1)
virgelyn Reply
hmm well what is the answer
how do they get the third part x = (32)5/4
kinnecy Reply
can someone help me with some logarithmic and exponential equations.
Jeffrey Reply
sure. what is your question?
okay, so you have 6 raised to the power of 2. what is that part of your answer
I don't understand what the A with approx sign and the boxed x mean
it think it's written 20/(X-6)^2 so it's 20 divided by X-6 squared
I'm not sure why it wrote it the other way
I got X =-6
ok. so take the square root of both sides, now you have plus or minus the square root of 20= x-6
oops. ignore that.
so you not have an equal sign anywhere in the original equation?
is it a question of log
I rally confuse this number And equations too I need exactly help
But this is not salma it's Faiza live in lousvile Ky I garbage this so I am going collage with JCTC that the of the collage thank you my friends
Commplementary angles
Idrissa Reply
im all ears I need to learn
right! what he said ⤴⤴⤴
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?
The answer is neither. The function, 2 = 0 cannot exist. Hence, the function is undefined.
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
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
types of nano material
abeetha Reply
I start with an easy one. carbon nanotubes woven into a long filament like a string
many many of nanotubes
what is the k.e before it land
what is the function of carbon nanotubes?
I'm interested in nanotube
what is nanomaterials​ and their applications of sensors.
Ramkumar Reply
what is nano technology
Sravani Reply
what is system testing?
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
what is system testing
what is the application of nanotechnology?
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
anybody can imagine what will be happen after 100 years from now in nano tech world
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
name doesn't matter , whatever it will be change... I'm taking about effect on circumstances of the microscopic world
how hard could it be to apply nanotechnology against viral infections such HIV or Ebola?
silver nanoparticles could handle the job?
not now but maybe in future only AgNP maybe any other nanomaterials
I'm interested in Nanotube
this technology will not going on for the long time , so I'm thinking about femtotechnology 10^-15
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, Principles of object-oriented programming. OpenStax CNX. May 10, 2013 Download for free at http://legacy.cnx.org/content/col10213/1.37
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