Java Programs. System.out.println("Dollar to rupee converion,enter dollar:");

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Eunice Johnston
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1 Java Programs 1.)Write a program to convert rupees to dollar. 60 rupees=1 dollar. class Demo public static void main(string[] args) System.out.println("Dollar to rupee converion,enter dollar:"); int rs = sc.nextint(); System.out.println("dollar is:"+rs/60); 2.) Write a program that calculates percentage marks of the student if marks of 6 subjects are given. class Mark public static void main(string[] args) int i; float sum=0; int m; System.out.println("enter marks of 6 Subjects:"); for(i=0;i<6;i++)

2 System.out.println("enter mark"+(i+1)); m = sc.nextint(); //int m = Integer.parseInt(args[i]); sum=sum+m; System.out.println("Percentage is:"+(sum/6)+"%"); 3.) Write a program to enter two numbers and perform mathematical operations on them. class Mathop public static void main(string[] args) int a, b; System.out.println("enter First number:"); a=sc.nextint(); System.out.println("enter Second number:"); b=sc.nextint(); System.out.println("Addition:"+(a+b)); System.out.println("Substraction:"+(a-b)); System.out.println("Multiplication:"+(a*b)); System.out.println("Divide:"+(a/b)); 4.) Write a program to find length of string and print second half of the string.

3 class Strop public static void main(string[] args) System.out.println("Enter String:"); String str = sc.nextline(); int l = str.length(); System.out.println("The Length of String is:"+l); System.out.println("Substring is:"+str.substring(l/2)); 5.) Write a program to accept a line and check how many consonants and vowels are there in line. class Strvc public static void main(string[] args) System.out.println("enter a string:"); String str = sc.nextline(); int l = str.length(); char ch; int i; int cv=0,cc=0; for(i=0;i<l;i++) ch = str.charat(i); if(ch=='a' ch=='e' ch=='i' ch=='u' ch=='o')

4 cv++; else if(ch!=' ') cc++; System.out.println("Vowel: "+cv+" Consonants:"+cc); 6.) Write a program to count the number of words that start with capital letters. class Strcap public static void main(string arg[]) System.out.println("Enter a line to count the Numer of Words that starts with Capital letters:"); String s = sc.nextline(); String s1 = s.touppercase(); char c,c1,c2,c3,ca; int count=0,i; c = s.charat(0); c1 = s1.charat(0); for(i=0;i<s.length();i++)

5 ca = s.charat(i); if(i==0) if((int)c==(int)c1) count++; else if(ca==' ') c2 = s.charat(i+1); c3 = s1.charat(i+1); if((int)c2==(int)c3) count++; System.out.println(count); 7.) Write a program to find that given number or string is palindrome or not. class Strpal public static void main(string arg[]) String rev="";

6 System.out.println("Enter a Number or String to check palindrom:"); String s = sc.nextline(); char ch; for(int i=s.length()-1;i>=0;i--) ch = s.charat(i); rev= rev + ch; if(rev.equals(s)) System.out.println("Palidrome"); else System.out.println("Not Palidrome"); 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. class Strquit public static void main(string arg[]) String s; String sq="quit"; int cv=0;

7 char ch; System.out.println("Enter Sentence, Note:quit will end program"); do s = sc.nextline(); for(int i=0;i<s.length();i++) ch = s.charat(i); if(ch=='a' ch=='e' ch=='i' ch=='o' ch=='u' ch=='a' ch=='e' ch=='i' ch=='o' ch=='u') if(s.equals(sq)) while(true); break; cv++; System.out.println("Vowels : "+(cv-2)); 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

8 public class Pyramid 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--) System.out.print(" "); for (k = 0; k <= i; k++) System.out.print(str.charAt(k)+" "); System.out.println(); 10.) Write an interactive program to print a diamond shape. For example, if user enters the number 3, the diamond will be as follows: * * * * * * * * * public class Diamond

9 public static void main(string[] args) int i, j, k; System.out.println("Enter no for stars"); int no = sc.nextint(); for (i = 0; i < no; i++) for (j = (no / 2) + 1; j >= i; j--) System.out.print(" "); for (k = 0; k <= i; k++) System.out.print("* "); System.out.println(); int space=2; for (i = 0; i < no; i++) for (j = 0; j <space; j++) System.out.print(" "); space++; for (k = no - 1; k > i; k--) System.out.print("* "); System.out.println();

10 11.) Create a class called Student. Write a student manager program to manipulate the student information from files by using FileInputStream and FileOutputStream. import java.io.fileinputstream; import java.io.fileoutputstream; public class Student public static void main(string[] args) System.out.println("Enter Student Information"); try FileOutputStream fout = new FileOutputStream("stdinfo.txt"); System.out.print("Enter Name:"); String name = sc.nextline(); System.out.print("Enter Samester:"); String sem = sc.nextline(); System.out.print("Enter Course:"); String cr = sc.nextline(); String str = "Name : "+ name +"\n"+ "Samester : " + sem +"\n" + "Course : " + cr; byte b[] = str.getbytes(); fout.write(b); fout.close(); catch (Exception e) System.out.println(e);

11 System.out.println("< Student Infromation >"); try FileInputStream fin = new FileInputStream("stdinfo.txt"); int i = 0; while ((i = fin.read())!= -1) System.out.print((char) i); fin.close(); catch (Exception e) System.out.println(e); 12.) Refine the student manager program to manipulate the student information from files by using the BufferedReader and BufferedWriter. import java.io.bufferedreader; import java.io.bufferedwriter; import java.io.filereader; import java.io.filewriter; import java.io.fileinputstream; public class StudentMng public static void main(string[] argv) throws Exception BufferedReader bufread = new BufferedReader(new FileReader("stdinfo.txt")); BufferedWriter bufwrite = new BufferedWriter(new FileWriter("refinestdinfo.txt")); int i; // manipulate the student information from files

12 do i = bufread.read(); if (i!= -1) if (Character.isUpperCase((char) i)) bufwrite.write(character.tolowercase((char) i)); else bufwrite.write((char) i); while (i!= -1); bufread.close(); bufwrite.close(); System.out.println("Refine Student File"); BufferedReader bfr = new BufferedReader(new FileReader("refinestdinfo.txt")); int ir=0; while((ir=bfr.read())!=-1) System.out.print((char)ir); bfr.close(); 13.) Refine the student manager program to manipulate the student information from files by using the DataInputStream and DataOutputStream. Assume suitable data. import java.io.*;

13 public class StdDataio public static void main(string args[]) throws IOException DataInputStream datais = new DataInputStream(new FileInputStream("stdinfo.txt")); DataOutputStream dataos = new DataOutputStream(new FileOutputStream("refinestdinfo.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 + ","); datais.close(); dataos.close();

K E Y I CYCLIC, EXAMINATION SECTION A

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