Practical 20 : Prepare a sequence diagram for issuing a book in the library management system
Solution:
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Practical 19 : Prepare an activity diagram for computing a restaurant bill, there should be charge for each delivered item. The total amount should be subject to tax and service charge of 18% for group of six and more. For smaller groups there should be a blank entry. Any coupons or gift certificates submitted by the customer should be subtracted
Solution:
Practical 16 : Categorize the following relationships into generalization, aggregation or association.
[A] A country has a capital city Solution: [B] A dining philosopher uses a fork Solution: [C] A file is an ordinary file or a directory file Solution: [D] Files contains records Solution: [E] A polygon is composed of an ordered set of points Solution: [F] A drawing object is text, a geometrical object, or a group Solution: [G] A person uses a computer language on a object Solution: [H] Modems and keyboards are input/output devices Solution: [I] Classes may have several attributes Solution: [J] A person plays for a team in a certain year Solution: [K] A route connects two cities Solution: [L] A student takes a course from a professor Solution:
Practical 13: Refine the student manager program to manipulate the student information from files by using the DataInputStream and DataOutputStream. Assume suitable data
Program : import java.io.*; public class practical13 { public static void main(String args[]) throws IOException { DataInputStream dataIS = new DataInputStream(new FileInputStream("stdinfo.txt")); DataOutputStream dataOS = new DataOutputStream(new FileOutputStream("newstdinfo.txt")); // manipulate the student information from files String str; while ((str = dataIS.readLine()) != null) { String upper = str.toUpperCase(); System.out.println(upper); dataOS.writeBytes(upper + " ,");...
Practical 12: Refine the student manager program to manipulate the student information from files by using the BufferedReader and BufferedWriter
Program: import java.io.*; import java.util.*; class practical12 { public static void main(String pqr[]) throws Exception { BufferedReader bufRead = new BufferedReader(new FileReader("stdinfo.txt")); BufferedWriter bufWrite = new BufferedWriter(new FileWriter("newstdinfo.txt")); int i; // manipulate the student information from files do { i = bufRead.read(); if (i != -1) { if (Character.isUpperCase((char) i)) { ...
Practical 11 : Create a class called Student. Write a student manager program to manipulate the student information from files by using FileInputStream and FileOutputStream
Program : import java.io.FileInputStream; import java.io.FileOutputStream; public class practical11 { public static void main(String[] args) { System.out.println("-------Writing Data in File-------"); try { FileOutputStream fout = new FileOutputStream("stdinfo.txt"); String str = "Nmae : Pruthviraj, Stream : INFORMATION TECHNOLOGY, Sem : 5th Sem"; byte b[] = str.getBytes(); fout.write(b); fout.close(); System.out....
Practical 10 : Write an interactive program to print a diamond shape. For example, if user enters the number 3, the diamond will be as follows:
* * * * * * * * * Program: import java.util.Scanner; public class practical10 { public static void main(String[] args) { int i, j, k; Scanner scan = new Scanner(System.in); int no = scan.nextInt(); for (i = 0; i < no; i++) { for (j = (no / 2) + 1; j >= i; j--) ...
Practical 9 : Write an interactive program to print a string entered in a pyramid form. For instance, the string “stream” has to be displayed as follows:
s s t s t r s t r e s t r e a s t r e a m Program: public class practical9 { public static void main(String[] args) { int i, j, k; String str = "Stream"; for (i = 0; i < str.length(); i++) { for (j = (str.length() / 2) + 1; j >= i; j--) ...
Practical 8 : Create a class which ask the user to enter a sentence, and it should display count of each vowel type in the sentence. The program should continue till user enters a word “quit”. Display the total count of each vowel for all sentences.
Program: import java.util.Scanner; public class practical8 { public static void main(String[] args) { System.out.println("Enter the word 'quit' to end this program."); String str; int x = 0, A = 0, E = 0, I = 0, O = 0, U = 0; char ch; Scanner in = new Scanner(System.in); while (x < 1) { str = in.next(); if (str.equals("quit")) { x++; ...
Practical 7: Write a program to find that given number or string is palindrome or not.
Program: import java.util.*; class practical7 { public static void main(String args[]) { String original, reverse = ""; Scanner in = new Scanner(System.in); System.out.println("Enter a string to check if it is a palindrome : "); original = in.nextLine(); int length = original.length(); for ( int i = length - 1; i >= 0; i-- ) reverse = reverse + original.charAt(i); if (original.equals(reverse)) System.out.println("Entered string is a palindrome."); else System.out.println(...
Practical 6: Write a program to count the number of words that start with capital letters.
Program: import java.util.*; class practical6 { public static void main(String m[]) { Scanner in=new Scanner(System.in); String s=new String(); System.out.println("Enter a line:"); s=in.nextLine(); char c; int ct=0; for(int i=0;i<s.length();i++) { c=s.charAt(i); if(c>=65 && c<=90) { ...
Practical 5: Write a program to accept a line and check how many consonants and vowels are there in line.
Program: import java.io.*; class practical5 { public static void main(String args[]) throws IOException { String str; int vowels = 0, digits = 0, blanks = 0; char ch; BufferedReader br = new BufferedReader(new InputStreamReader(System.in)); System.out.print("Enter a String : "); str = br.readLine(); for(int i = 0; i < str.length(); i ++) { ch = str.charAt(i); if(ch == 'a' || ch == 'A' || ch == 'e' || ch == 'E' || ch == 'i' || ch == 'I' || ch == 'o' || ch == 'O' || ch == 'u' || ch == 'U') vowels ++; else if(Character.isDigit(ch)) digits ++; else if(Character.isWhitespace(ch)) blanks ++; } System.out.println("Vowels : " + vowels); System.out.println("Digits : " + digits); System.out.println("Blanks : " + blanks); } } Output: