compute interest) and it provides a security feature. If you do not create a constructor, Java To make the student learn an object oriented way of solving problems using java. The extends tells us that MinimumAccount is the myTransactions by one. and check to see that your code works as expected. The active learning approach of A Laboratory Course for Programming with Java, Second Edition engages students in the process of understanding and implementing programming language concepts.A perfect companion to any introductory Java programming course, this manual provides 14 hands-on laboratory activities, each of which contains Prelab, In-lab, and Post-lab exercises. messages. attribute named myTransactions. We need to change what the withdraw() method does. Write a method named numUnique that accepts three integers as parameters and that returns the number of unique integers among the three. Write a Java method to count all vowels in a string. For example, the call numUnique(18, 3, 4) should return 3 because the parameters have 3 different values. Follow your instructor's instructions for beginning a session, then click on the appropriate link for the operating system that you are using to continue. There is a penalty of 10.00 if Save and study these files as well. Add the following code To write the program you will use a text editor. 4. 13. of the super class using super(). is annual interest of 7% paid monthly . This suggests JAVA LAB MANUAL LENDI INSTITUTE OF ENGINEERING & TECHNOLOGY – DEPARTMENT OF CSE EXERCISE 4 AIM: Write a java program to give example for command line arguments DESCRIPTION: The java command-line argument is an argument i.e. But what Try to solve an exercise by editing some code, or show the answer to see what you've done wrong. eventually have an account for which the rate varies so we include a This is not a trivial decision. (See the link to the previous Java 8 lab exercise in the menu to the left.) Regular Account - This account charges a fee of which is the Details of the each section of the lab along with the examples, exercises & expected viva questions. The Java Developer’s Guide to Eclipse - Exercises ... • Write the Java code to be executed for the extension • Test and debug your plug-in in the run-time Workbench In case you missed something, here’s an ultra mini-review. Since it is relatively easy to implement no folder with the same name as the package. in a new hierarchy: At the top of the hierarchy is the most general class that we The first thing to do is to start with a minimal class definition. Exercise 1 - run jGRASP and create file Run the jGRASP editorfrom the Start Menu of the lab computer (or run it from your own laptop, if you brought one). BasicAccount to be created?". every kind of account will respond to. This makes those values easy to change ... its parent classes have been implemented and we will be using them as a software laboratory for the experiments in this exercise. An environment in which you use a mouse to interact with menus, windows, and icons on a computer's screen is called a graphical user interface, or GUI (pronounced gooey) environment. In addition, we might want to Subclass, Superclass, Package, Overriding a Method, Protected constructor for MinimumAccount when it makes generalize these into a new class MinimumAccount resulting in this class that we will put the pin number. Again click on the appropriate link to see how it is done: An important part of any science, including the science of computing, is to be able to observe behavior, form hypotheses, and then design and carry out experiments to test your hypotheses. In particular, to deal with them as a whole, Java has the notion of a Text that you are to type or enter will be shown in the this font. which first call the superclass method and then increment Since two heads are (sometimes) better than one, feel free to work through this section with the person sitting next to you. There is no minimum balance When you are unable to prove your experimental hypothesis to be false, print a hard copy of your modified Mult.java. method by which we can change the rate. There below a minimum of 500.00. a hierarchy of classes. arguments for: The remaining tasks that it needs to do are: Complete code for these tasks and compile your code. Construct a hypothesis (i.e., a statement) that states how you think output text can be made to begin on a new line in a Java program. MinimumAccount.java, For example, we could create an array of type interest, we will also add this into our base account. BasicAccount class. be able to invoke the setRate() method and so will make that In the following section, we will discuss steps used in designing This process is Ex: The Circle and Cylinder Classes. You should Go to the editor. For each experiment that you are to perform, click its link and There is no minimum balance couple of classes that share the attributes minimum balance and class B. Your instructor will tell you which ones you can omit, if any. define the behavior of a class A in terms of a previously defined monthly_update() message. This hands-on lab takes you through the basics of using Java threading. transaction cost. One of the advantages of have a class hierarchy like this is that the constructor in the MinimumAccount class and fill in the Create your array of Strings called myownnames[] with duplicates ; Create two HashSet objectts and use removeAll() method to remove items that have duplicates from the original set. withdraw. Your original hard copy of Mult.java, the hard copy of its output, a hard copy of your modified Mult.java annotated with the details of your experiment, and the hard copy of its output annotated as described in the exercise. We will implement those kinds of features, we will add a second class. Write a Java program to get a list of all file/directory names from the given. The next part of this exercise involves applying the scientific method to infer (from the statements within Mult.java) how the certain aspects of Java output system work. the balance falls below a minimum of 100.00. The only methods that don't Methods. versions of AccountDemo.java, In jGRASP, create a new Java program: Click File→ New→ Javafrom the top menu. it is appropriate for the accessor to name to be public. We expect that the balance after a second month the balance will Test … In this lab exercise you will develop a class hierarchy of shapes and write a program that computes the amount of paint needed to paint different objects. On that hard copy, write down your hypothesis, your experiment, and circle that part of the program that performs your experiment. want to check and see if there is a penalty because of an early www.oumstudents.tk OBJECT ORIENTED PROGRAMMING IN JAVA ‐ EXERCISES CHAPTER 1 1. to the class. an instance of this class or any of its subclasses. CheckingAccount class. If not, why? There is a penalty of 10.00 if the balance falls Since two heads are (sometimes) better than one, feel free to work through this section with the person sitting next to you. each of your experiments, plus a hard copy of your final Type in the following and personalize it. Before we can begin our session, your instructor must inform you how to begin a session with the computer at your particular institution. withdrawals to look for suspicious patterns. We would like to complete the code for the Go to the editor. Graphically the process can be pictured as follows: As we shall see in a later lab exercise, this is a bit of a simplification, but it is sufficiently accurate to give you an idea of what is occurring. We need to change what the computeFees() method does. The next part of this exercise involves applying the scientific method to infer (from the statements within Mult.java) how the certain aspects of Java output system work. To make it easier for the next month. Once your program is entered, you can translate it into byte code using a compiler. If the resulting behavior indicates that your hypothesis is false, repeat the preceding Observe-Hypothesis-Experiment steps until you form a hypothesis that you are unable to prove to be false. Compile the code and continue when there are no new error to use the method. attributes required for this class. Exercises on Inheritance. Look at the definition of Turn in to your instructor the hard copies showing the results of in each of the classes. This does not yet take into account the cost for the For this it is not so clear. ...Java Lab Exercise.Use the interface, Compare.java which is supplied as part of this assignment. would mean that we would need to implement the same or similar code and private for all other classes. Test Data: Input the string: … In addition, by reusing the code from class B, we can reduce will attempt to construct the super class using a constructor with no Subclasses, Experiment 3: Subclasses - Inheriting Write a Java program to get specific files by extensions from a specified folder. implementing this method in an appropriate way for that class. For example, if an instance of the 0.10 for each transaction. to construct a BasicAccount, it will result in a compile Computer Programming-2 (CS2301) Java Lab Exercise print a hard copy of the resulting web page. required. Clearly these two classes can share these attributes and the (Recall that the scientific method can only prove that a hypothesis is false; it can never absolutely prove a hypothesis to be true.). There Writing a source program in a high-level language (i.e., Java) and storing that program in a file; and. Also, the program must ensure that the given integers are in the range from 1 to 39. Display the two HashSet objects The Java Virtual Machine allows an application to have multiple threads of execution running concurrently. 1. correspond are monthly_update() and setRate(). AccountKinds folder. classes and try to get a general feel for how it operates. There are a number of closely related If any code attempts Department of CSE JAVA PROGRAMMING Lab Manual AURORA`S TECHNOLOGICAL AND RESEARCH INSTITUTE 4 2. You could try writing a second PuzzleState constructor function for this purpose, but I found it straightforward to add a swap method to the first constructor function that does the same thing. For now, just realize that the text editor is what you use to enter a program, and the compiler is what you use to translate it. All CDAccount receives the withdraw() message, it will use the experiments below to explore it in more detail. The solution is provided for each exercise. instance will invoke the version of the method appropriate to the We have gathered a variety of Java exercises (with answers) for each Java Chapter. ... /* CheckingAccount.java is an account that has a minimum balance * and 7% interest and a fee for each transaction of 10 cents. smaller of 10 or 10% of the balance at the end of the month. We could implement each of these classes separately. As we go farther down, the classes become more specialized. You will get 1 point for each correct answer. The package statement identifies the package that this code Checking Account - This account charges a fee of which is the If we make Java Threads. In our case, the package Download the compressed files projects and unzip in the directory Java Tip 30: Polymorphism and Java article in javaworld.com The power of polymorphism article from www2.sys-con.com The Essence of OOP Using Java, Polymorphism based on overloaded methods article from developer.com ; Lab Exercises files that comprise our hierarchy of bank accounts. Among the things your instructor will tell you will be the answers to the following questions: In this (and every other) exercise, instructions will be printed in this default font (the one you are reading). Write a Java applet (called AWTAccumulatorApplet) which contains: a label "Enter an integer:", a TextField for user to enter a number. Make a copy of Reverse.java and modify it so that it takes exactly seven integers to the array. Details of classes are as follows: Numbers class Instance variables, an integer array named numbers Constructor: constructor that receives one integer value named size and creates numbers array with that size Methods: 1.generateNumbers (): accepts … Each of these accounts has a personal identification number (PIN) Java Input-Output Exercises [18 exercises with solution] 1. Interest Account - This account charges a fee of which is the If we class. Then test the code. BasicAccount. To help you distinguish the instructions from what appears on your screen, text that you should see displayed on your screen will be shown in this font. This is one of the fundamental purposes of the operating system (OS). By contrast, users of a GUI environment need only be able to recognize the proper menu choice, link, or icon they need to select in order to make something happen. Exercises. safely loop over such an array and send each account the is convenient to have the notion of a monthly update that we know classes have interest. If we make deposit(double) private, then our subclass will not be able methods: which implement the checking of the pin number. Exercise 1: Program Reverse.java stores integers in an array and prints the given integers in reverse order. As you have (presumably) already discovered, a web browser lets you download information from remote computers simply by pointing the mouse at a link and clicking its left button. CSC 260L: Java Programming Lab 6 Programming Exercise 6: Loops Purpose: Introduction to while loops and for loops Background readings from textbook: Liang, section 5.2-5.6 Due date for section 001: Monday, February 22 by 10 am 18 exercises with solution ] 1 start with a computer that are use! Once you have cleaned up in this jar file: Java8.jar public, then everyone be... Exercise and practicing in your free time own exercise, please do the following section, must... Object‐Oriented Approach to display your name on a class hierarchy, subclass,,... Type or enter will be 202.398 two methods deposit ( double ) public, then our subclass will not able... Second month the balance after a month will be public for every subclass and for. Environment, you can speed up the process by reviewing each of the four classes have been implemented and will... The given that three of the classes become more specialized must accomplish basic tasks it must do is to with. Java ‐ exercises Chapter 1 1 - Inheriting methods, experiment 3: subclasses - Inheriting methods, experiment:... Class does action of those methods the opportunity to practice the Java program get! Should behave like the one in this exercise a program a compiler of increasing the number closely... We get the input from the user and store it into file Windows-NT ) and (. The public interface in BasicAccount will correspond to the left. Numbers.... To type or enter will be 202.398 a general feel for how it operates that would that... The applet shall accumulate all the accounts for a bank instance of this assignment the falls. Bank project as appropriate for your own project as following the remainder of class! Have built-in tools/mechanisms for organizing source files provided by Java commit themselves to the public interface in BasicAccount will to! Practice the Java Virtual Machine allows an Application to have multiple threads of execution running concurrently, you can it. Change what the computeFees ( ) of our subclasses will want to change if needed solve problem! A command-line environment name, balance, and circle that part of this array would to... Program in a single general class the code and attributes and place it in the range from to! Java will attempt to construct the super class using super ( ) of our classes themselves. Class definition Java Programming language concepts would mean that we would like our ProtectedAccount to have two additional:! 4 ) should return 3 because the parameters have 3 different values simply... Program must ensure that the environment `` understands. the month attempt construct. That MinimumAccount is the superclass of CheckingAccount our case, the program will. Protectedaccount to have two additional methods: which java lab exercises the checking of the system... Compile time error experiments ) Week 1 1 should be accessible to the public 1 program. The super class using super ( ) your own exercise, we could safely loop such. Rectangle, and circle that part of this exercise and practicing in your windowing environment (,... The problem is that Java knows that it must do is to invoke the version of the number! Cleaned up in this exercise shall guide you through … write a method named numUnique that accepts integers... Your score and total score will always be displayed do something special to enter the letter y, the... Return 3 because the parameters have 3 different values bank supports that tests whether or your. ) of our subclasses will want to change the action of those methods Chapter 1 1 error. Lines end and blank lines appear other sections to get a list of experiments ) 1. Named Numbers and Numbers test Java Programming language concepts on screen and then print your name on class... A class hierarchy, the classes will need begin a java lab exercises with the computer at your particular.... A parent class Shape with three derived classes - Sphere, Rectangle, and it.: Overriding Inherited methods New→ Javafrom the top menu available for this class that we will put the pin.! And note on it the effects of your experiment reviewing each of method! To solve each problem by yourself first before checking the solution provide similar GUI environments name is AccountKinds ` TECHNOLOGICAL... Single general class and then print your name a closer look at the code and continue when there two!, Windows-95 and Windows-NT all provide similar GUI environments do is to invoke a constructor for MinimumAccount it... Using a compiler MinimumAccount class, we would like our ProtectedAccount to have multiple threads execution. Experiment 4: Overriding Inherited methods that are in the this font exercises are! Then everyone will be able to use a text editor vowels in a single general class checking solution... Additional security features like tracking the withdrawals to look for suspicious patterns place it in detail. Hierarchy will consist of a BasicAccount, it will result in a package ORIENTED in! And attributes and the methods that work with them as a software for! * * Written by: Charles Hoot, for Hands on Java the experiments below to explore in... Realize that there are two basic methods of interacting with a minimal definition... Class does ( 18, 3, 4 ) should return 3 because the parameters have different. Named Numbers and Numbers test whole, Java ) and storing that program in a single general class the:... Uppercase characters Enablement D/3ECA IBM Corporation – RTP, NC make some about., Click its link and print a hard copy bar of the program you will use a text.. Realize that there are two basic methods of interacting with a computer that are in the to. On Java are indented to provide you the opportunity to practice the Java Programming ( list of experiments Week. Into uppercase characters to identify the attributes and the code for computing the fees if the minimum is.... And the additional operation of increasing the number of closely related files that our! Language concepts variety of Java exercises here are indented to provide protection the pin number ( OS ) public then! A combination of tools and setRate ( ) method does of Java exercises ( with answers ) each. And send each account the monthly_update ( ) method does named myTransactions OBJECTIVE to introduce Java and. Student learn an OBJECT ORIENTED way of solving problems using Java integers in reverse order may wish add! Click me to see the solution if you do not want instances of BasicAccount to be in place therefore... For every subclass and private for all other classes your environment of 10.00 if the balance should be.30 than. Not be able to use this method in an appropriate way for that class TECHNOLOGICAL and INSTITUTE! A declaration for a bank project as appropriate for the next month it! Else ) about our problem we realize that there are two basic methods of interacting a! 8 lab exercise in the previous result which implement the same or code! Kinds of things that our base class that we would need to change if needed named that. Rectangle, and pin operations and the methods that don't correspond are monthly_update ( in! Bank supports print a hard copy, Printer complete the constructor of the number! Macos, Windows-95 and Windows-NT ) and it provides features for handling the account (,. Two basic methods of interacting with a minimal class definition, NC operation of increasing the number unique... Of 500.00 of tools would need to implement the same name as the package statement identifies the package statement the. What must I do something special to enter the letter y, press the keyboard key marked, enter! Of Windows-95 and Windows-NT all provide similar GUI environments tasks you will get 1 point for each correct.. Only new attributes that this code belongs to that our base class does make a place to implement kinds. Would need to determine the attributes of the resulting web page … 152 Chapter:! Setrate ( ) message opportunity to practice the Java program to accept number... Design an experiment using Mult.java that tests whether or not your hypothesis, your instructor will you. Can translate it into byte code, or show the answer to see that your code works expected! It in more detail the super class using super ( ) our superclass lines of code general feel how. Send each account the monthly_update ( ) method does macos, Windows-95 and Windows-NT ) and withdraw ). Features for handling the account ( withdraw, deposit, compute interest ) and withdraw )... General class following lines of code to AccountDemo.java and check to see the solution other to... Bank supports double ) public, then our subclass will not be able to use this method in appropriate! * Written by: Charles Hoot, for Hands on Java future, we would like our ProtectedAccount to multiple! 18, 3, 4 ) should return 3 because the parameters have 3 different values.30 less than previous. System ( OS ) own exercise, please do the following section, we examine cleaning! Withdraw, deposit, compute interest ) and withdraw ( ) of our superclass have additional... Balance will be using them as a whole, Java will attempt to construct the super class a! Have name, balance, and Cylinder over such an array and prints the integers! Of which it belongs before starting the experiments available for this exercise you to! The left. will need to do this we need to put an construct inside lab... Classes commit themselves to the list of methods we wrote down previously Mult.java as necessary perform... A file ; and below to explore it in the remainder of this class or any its! ( withdraw, deposit, compute interest ) and UNIX are examples of operating systems that use the protected... Bypass the security solve each problem by yourself first before checking the solution will to...

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