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Consider the following class de nition. This class is considered to be in an inconsistent state if the isConsistent() method returns false false false;
public class Foo {long mVaLue;long mVaLueTimesTwo;/*a• SETS THE STATE OF DUR OBJECT.•• PAUSES BRIEFLY BETWEEN SETTING THE FIRST AND SECOND• VALUES IN ORDER TD INCREASE THE PROBABILITY THAT THE• OBJECT WILL BE INTERROGATED WHILE IN AN INCONSISTENT• STATE.•• OPARAM PVALUE THE VALUE TO UPDATE THE CURRENT STATE WITH,public synchronised void set Values(long plIalue) { stfalue p Value ;doPause(3);mVaLueTimesTwo = pValue • 2;}/•:• CHECKS TD SEE IF THE CURRENT STATE OF OUR OBJECT IS• CONSISTENT.•• :RETURN TVS. 17 17 IS. * /public synchronized boolean t sCons is t ent {return (mVatue • 2 == mValueTimesTwo);}/**• UTILITY ROUTINE - PAUSES OUR THREAD BY CALLING• SLEEP AND SUPRESSING ANY INTERRUPTEDEXCEPTION.* /private static void doPause(lon$ pPause) { try {Thread.steep(pPause);} catch (InterruptedException e) { e.printStackTrace();}}
a. Imagine a hypothetical version of Java where the object lock is replaced by a method lock. Under this system a call to a synchronised method would assign a lock for that method to the calling thread. No other thread could then call this method because the lock is already allocated. However, other methods of the same object could still be called. Upon the method completing, the lock is released. Under this system, is it possible to put an instance of the Foo class into an inconsistant state? If so, give a code example which could create this situation and explain how it does so. If not, explain how the method lock prevents the possibility of inconsistent state.
b. Provide one possible motivation for choosing this hypothetical method lock over an object lock. Explain your answer.
Write a program to compute the total volume for a number of cylinders. A cylinder may have different values for height and radius.
write a program that calculates an employees wage for a week. an employees wage is calculated as followsi if the number
One metric ton is approximately 2205 pounds. Write a program that prompts the user to input the amount of rice, in pounds, in a bag. The program outputs the number of bags needed to store one.
What will following segment of code output? int x = 5; if (x != 2) System,out.println( "This is true!"); else System.out.println( "This is false!"); System.out.println("This is all folks!");
Write a C++ program that creates and populate a tree for an arithmetic expression. Then it should perform an in-order and a post-order traversal on the tree.
In some Asian countries, 8 and 6 are considered lucky digits. Any number containing only 8s and 6s is considered lucky number, e.g. 6, 8, 66, 668, 88, 886 .... Nguyen is a student who likes mathematics very much. Nguyen likes lucky numbers but only o..
make a program to play lottery. The program randomly generates a Lottery of a three-digit number( any number from 100 to 999), prompts the user to enter a three-digit number, and determines
Create a class called Vehicle that has the manufacturer's name (type String), number of cylinders in the engine (type int), and owner (type Person given below).
write a program that implementd and test the following functions for use C-strings without using the c-string libaray ( that is, you re NOT ALLOWED to use #include in this program):
SEN 970 Object-Oriented Programming in Objective-C. Demonstrate the classes in a program that has an array of ship pointers. The array elements should be initialized with the addresses of dynamically allocated Ship, CruiseShip and CargoShip objects..
Write a c++ program that stores the following numbers in the array named miles: 15,22,16,18,27,23, and 20. have your program copy the data stored in miles to another array.
Calculates the student * averages and quiz averages based upon input from the user. Modify this program to read in the following grade text file, * with a maximum number of students set to 35 and having five quiz scores for each student. The output s..
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