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Answer 9


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Answer 8


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Answer 7

False. An object of type Map can contain duplicate values but cannot contain duplicate keys.

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Answer 6

False. An object of type SortedSet is a Set that, by default, maintains its elements in ascending order.

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Answer 5

False. A SortedMap is a Map that maintains its entries in ascending order, sorted according to the keys' natural ordering,or according to a Comparator provided at the time of the SortedMap creation.

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Answer 4


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Answer 3


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Answer 2

The output produced by the program in Listing 1 is shown in Figure 1 .

Figure 1 - Answer 2.
Original array contents 10 11 12 13 14 15 16 17Collection contents B0 B1 L2 B3 B4 L5New array contents B0 B1 L2 B3 B4 L5 null 17Modified array contents XX B1 L2 B3 B4 L5 null 17Collection contents XX B1 L2 B3 B4 L5

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Answer 1


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Complete program listing

Listing 1 . ToArray02.java .
//File ToArray02.java //Copyright 2001, R.G.Baldwinimport java.util.*; import javax.swing.*;public class ToArray02{ public static void main(String args[]){ new Worker().doIt();}//end main() }//end class ToArray02//===================================// class Worker{public void doIt(){ Collection ref;//Create, populate, and display // the contents of an arrayJComponent[] array = new JComponent[8]; for(int cnt=0;cnt<8;cnt++){ array[cnt]= new JButton(); array[cnt].setToolTipText("" + (cnt+10)); }//end for loopSystem.out.println(); showArray(array,"Original array contents");//Create, populate, and display the // contents of a collectionref = new LinkedList(); Populator.fillIt(ref);showCollection(ref,"Collection contents"); //Get collection contents into the// array and display the new // contents of the array.array = (JComponent[])ref.toArray(array);showArray(array,"New array contents"); //Modify a property of an object// referred to by one of the // elements in the array. Display// array contents after // modification((JComponent)array[0]).setToolTipText("XX");showArray(array,"Modified array contents"); //Display the contents of the collectionshowCollection(ref,"Collection contents"); }//end doIt()//-----------------------------------// //Utility method for displaying// array contents void showArray(Object[]array,String title){ System.out.println(title);for(int i = 0; i<array.length;i++){ if(array[i]== null){ System.out.print("null ");}else{ System.out.print(((JComponent)array[i]). getToolTipText() + " ");}//end else }//end for loopSystem.out.println(); }//end showArray()//-----------------------------------// //Utility method for displaying// collection contents void showCollection(Collection ref,String title){System.out.println(title); Iterator iter = ref.iterator();while(iter.hasNext()){ System.out.print(((JComponent)iter.next()).getToolTipText() + " "); }//end while loopSystem.out.println(); }//end showCollection}// end class Worker //===================================//class Populator{ public static void fillIt(Collection ref){ref.add(new JButton()); ref.add(new JButton());ref.add(new JLabel()); ref.add(new JButton());ref.add(new JButton()); ref.add(new JLabel());Iterator iter = ref.iterator(); int cnt = 0;JComponent refVar; while(iter.hasNext()){refVar = (JComponent)iter.next(); if(refVar instanceof JButton){refVar.setToolTipText("B"+cnt++); }else{refVar.setToolTipText("L" + cnt++); }//end else}//end while loop }//end fillIt()}//end class Populator


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Housekeeping material
  • Module name: Java4160r: Review
  • File: Java4160r.htm
  • Published: 12/04/13

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Questions & Answers

Do somebody tell me a best nano engineering book for beginners?
s. Reply
what is fullerene does it is used to make bukky balls
Devang Reply
are you nano engineer ?
what is the Synthesis, properties,and applications of carbon nano chemistry
Abhijith Reply
so some one know about replacing silicon atom with phosphorous in semiconductors device?
s. Reply
Yeah, it is a pain to say the least. You basically have to heat the substarte up to around 1000 degrees celcius then pass phosphene gas over top of it, which is explosive and toxic by the way, under very low pressure.
how to fabricate graphene ink ?
for screen printed electrodes ?
What is lattice structure?
s. Reply
of graphene you mean?
or in general
in general
Graphene has a hexagonal structure
On having this app for quite a bit time, Haven't realised there's a chat room in it.
what is biological synthesis of nanoparticles
Sanket 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
how did you get the value of 2000N.What calculations are needed to arrive at it
Smarajit Reply
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