JAVA PROGRAMMING LAB PROGRAMS

 JAWAHARLAL NEHRU TECHNOLOGICAL UNIVERSITY ANANTAPUR.                                                                                                         

JAVA PROGRAMMING LAB.

List of Sample Problems/Experiments

I) JAVA PROGRAMS:

 1. a) Write aJava program that prints all real solutions to the quadratic equation ax2 + bx + c = 0. Read in a,b, c and use the quadratic formula. If the discriminant b2 -4acis negative, display a message stating that there are no realsolutions.

    b) The Fibonacci sequence is defined by the followingrule: The fist two values in thesequence are 1 and 1. Every subsequent value is the sum of the twovalues preceding it. Write a Java program that uses both recursiveand non recursive functions to print the nth value in theFibonacci sequence.

 2. a) Write a Javaprogram that prompts the user for an integer and then prints out all prime numbers up to that integer.

     b)  Write a Java program to multiply two given matrices.

     c)  Write a Java Program that reads a line of integers, andthen displays each integer, and the sum ofall the integers (Use String Tokenizer class of java.util)

 3.  Write a Java program to find both the largest and smallest number in a list of integers.

 4. Write a Java program to illustrate method overloading.

 5. Write a Java program that implements the Sieve of Eratosthenes to find prime numbers.

 6. Write a Java program to sort a list of names in ascending order.

 7. Write a Java program to implement the matrix ADT using a class. The operations supported by this ADT are:z

a)      Reading a matrix.                     c) Addition of matrices.

b)      Printing a matrix.                     d) Subtraction of matrices.

e)   Multiplication of matrices.

 8. Write a Java Program to solve Tower’s of Hanoi  problem .

 9. Write a Java Program that uses a recursive function to compute ncr.

               (Note: n and r  values are given.)

 10. Write a Java program  to perform the following operations:

a)      Concatenation of two strings.

b)      Comparison of two strings.

 11. Implement the complex number ADT in Java using a class. The complex ADT 

      is used to represent complex numbers of the form c=a+ib, where a and b are real numbers. The operations supported by this ADT are:

a)            Reading a complex number.      d) Subtraction of complex numbers.

b)            Writing a complex number.       e) Multiplication of complex numbers.

c)            Addition of Complex numbers.  f) Division of complex numbers.

 12. Write a Java program that makes frequency count of letters in a given text.

 13. Write a Java program that uses functions to perform the following

        operations :

a)      Inserting a sub-string in to the given main string from a given position.

b)   Deleting n characters from a given position in a given string.

 14. a) Writea Java program that checks whether a given string is a

           palindrome or not.  Ex: MADAM is a palindrome.

       b) Writea  Java program to make frequency countof words in a given text.

 15 .a) Writea Java program that reads a file name from the user, then displays information  about whether the file exists, whether thefile is readable, whether the file iswritable, the type of file and the length of  the file in bytes.

       b) Writea Java program that reads a file and displays the file on the screen, with a line number beforeeach line.

       c)  Write a Java program that displays the number ofcharacters, lines and  words in a text file.

 d)     Write a Java program to change a specific character in a file.

Note: Filename , number of the byte in the file to be changed and the new  character

are specified on the command line.

  16.  Write a Java program that:

            i) Implements stack ADT.

           ii) Converts infix expression intoPostfix form 

          iii) Evaluates the postfixexpression.

  17.   a) Develop an applet in Java thatdisplays a simple message.

          b) Develop an applet in Java that receives an integer in one text field, and

             computes its factorial Value and returns it in another text field, when

             thebutton named “Compute” is clicked.

18.    Write a Java program that works as a simple calculator. Use a grid layout

            to arrange buttons for the digits and for the +, -,*, % operations. Add a

            text field to display the result.

  19.    Writea Java program for handling mouse events.

  20. a) Write a Java program that creates three threads. First thread displays

            “Good Morning” every one second, the second thread displays “Hello”

            every two seconds and the third thread displays “Welcome” every

            three seconds.

      b) Write a Java program that correctly implements producer consumer

            problem using the concept of interthread communication.

 21. Write a Java program that creates a user interface to perform integer

          divisions. The user enters two numbers in the text fields, Num1 and

          Num2. The division of Num1 and Num2 is displayed in the Result field

          when the Divide button is clicked. If Num1 or Num2 were not an

          integer, the program would throw a Number Format Exception. If Num2

          were Zero, the program would throw an Arithmetic Exception Display

          the exception in a message dialog box.

22 . Write a Java program that implements a simple client/server application.

          The client sends data to a server. The server receives the data, uses it

          to produce a result, and then sends the result back to the client. The

          client displays the result on the console.  For ex: The data sent from the

          client is the radius of a circle, and the result produced by the server is

          the area of the circle. (Use java.net)

23.  a) Write a Java program that simulates a traffic light. The program lets

            the user select one of three lights: red, yellow, or green. When a

            radio button is selected, the light is turned on, and only one light can

            be on at a time No light is on whenthe program starts.

       b) Write a Java program that allows the user to draw lines, rectangles

           and ovals.

24 . a) Write a Java program to create an abstract class named Shape that

      contains an empty method named numberOfSides ( ).Provide three

      classes named Trapezoid, Triangle and Hexagon such that each one

      of the classes extends the class Shape. Each one of the classes

      contains only the method numberOfSides ( ) that shows the number

      of sides in the given geometrical  figures.

      

       b) Suppose that a table named Table.txt is stored in a text file. The first

             line in the file is the header, and the remaining lines correspond to rows

             in the table. The elements are separated by commas. Write a java

             program to display the table usingJtable component.

  25. Write a Java program that illustrates the following

a)      Creation of simple package.  b) Accessing a package.

c)  Implementing interfaces.

  26. Write  Java programs that illustrates the following

            a) Handling predefined exceptions

            b) Handling user defined exceptions 

  27. Write Java programs that use both recursive and non-recursive functions   

        for implementing the following searching methods:

a) Linear search                  b) Binary search         

     28.  Write Java programs to implement the following using arrays and linked lists  

           a) List ADT                     

     29.  Write Java program to implement the following using an array.

              a) Queue ADT

     30. Write a Java program for handling Key events.

31.   Write a Java program that uses both stack and queue to test whether the given

       string is a palindrome.

 

      32. Write Java programs to implement the following using a singly

          linked list.

a) Stack ADT                      b) Queue ADT

          33. Write Java programs for implementing the following sorting methods:

a) Bubble sort                     d) Quick sort   

b) Selection sort                             

c) Insertion sort