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Describe toString() Methods ?
Print methods are general in some languages, but most Java programs operate differently. You can use System.out.println() to print any object. Therefore for good results your class should have a toString() method which formats the object's data in a sensible way and returns a string. Otherwise all that's printed is the name of the class that is generally not what you need. For instance, a good toString() method for the Car class might be
public String toString() { return (this.licensePlate + " is moving at " + this.speed + "kph and has a maximum speed of " + this.maxSpeed +"kph."); }
how class and object work
String is immutable in java : you can't change a string object but can replace it by creating a new object instance. Creating a new instance is rather expensive. //Non ef
need a java program that can read and display the values from a windows registry
I send you these files in order to make clear image about my task that I want you to design for me an application for PC that used to control robot arm via micro controller PIC18.
examples of 2D arrays
In Exercise 1 you were asked to modify the Sorts program so that it would output the number of swaps used by a sorting method. It is a little more difficult to have the program als
Alia is appearing for the board exams. In order to qualify for the next class Alia need to get exactly X credits. In current semester Alia has to study N number of subjects, and ev
How many JSP scripting elements and what are they? Ans) Three scripting language elements are there: a) declarations, b) scriptlets, c) expressions.
In JavaScript, what is event handling? What are the two categories of events? In java script we could capture events on do a few operation on the basis of which particular even
How do you decide when to use HashMap and when to use TreeMap? When we want to perform deletion, insertion and locate elements in a Map then HashMap is used. Whereas TreeMa
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