Write an interactive program to print a string entrered in a pyramid form. For instance, the string "stream"

 
         
public class Program_9 {

    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();
        }

    }
}
        
  

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”.

         
import java.util.Scanner;
public class Program_8 {

    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++;
                in.close();
                break;
            } else {
                for (int i = 0; i < str.length(); i++) {
                    ch = str.charAt(i);

                    if (ch == 'a' || ch == 'A') {
                        A++;
                    } else if (ch == 'e' || ch == 'E') {
                        E++;
                    } else if (ch == 'i' || ch == 'I') {
                        I++;
                    } else if (ch == 'o' || ch == 'O') {
                        O++;
                    } else if (ch == 'u' || ch == 'U') {
                        U++;
                    }
                }
            }
        }
        System.out.println("Vowels A or a: " + A + "\nVowels E or e: " + E + "\nVowels I or i: " + I);
        System.out.println("Vowels O or o: " + O + "\nVowels U or u: " + U + "\nTotal Vowels: " + (A + E + I + O + U));
    }
}
        
  

Write a program to find that given number or string is palindrome or not.

 
import java.util.Scanner;

public class Program_7 {
    public static void main(String[] args) {
        
        Scanner scan = new Scanner(System.in);
        String str = scan.next();
        
        String rvs = new StringBuffer(str).reverse().toString();
        
        if(str.equals(rvs)){
            System.out.println("It is palindrome");
        }
        else{
            System.out.println("It is not palindrome");
        }
    }
    
}
  

Write a program to count the number of words that start with capital letters.

 
 

import java.util.Scanner;

public class Program_6 {

    public static void main(String[] args) {

        int count = 0;
        Scanner scan = new Scanner(System.in);
        String str = scan.next();

        for (int i = 0; i < str.length(); i++) {
            if (Character.isUpperCase(str.charAt(i))) {
                count++;
            }
        }
        System.out.println("No of Capital Letters:" + count);
    }
}

  

Write a program to accept a line and check how many consonants and vowels are there in line

 
import java.io.*;
class Program_1
{
 public static void main(String args[]) throws IOException
 {
  String str;
  int vowels = 0, consonants = 0;
  char ch;
  BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
  System.out.print("Enter a Line : ");
  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.isAlphabetic(ch))
    consonants ++;   
  }
  System.out.println("Vowels : " + vowels);
  System.out.println("Consonants : " + consonants);  
 }
}
  

Write a program to find length of string and print second half of the string.

  
         
import java.util.Scanner;

public class Program_4 {
    
    public static void main(String[] args) {
        
        Scanner scan = new Scanner(System.in);
        String str = scan.next();
        
        System.out.println("Lenght of String : "+str.length());
        System.out.println("Print second half : "+str.substring(str.length()/2));     
    }  
} 
        
  

Write a program to enter two numbers and perform mathematical operations on them.

         
import java.util.Scanner;

public class Program_3 {

    public static void main(String[] args) {

        int number1,number2,result;
        Scanner scan = new Scanner(System.in);

        number1 = scan.nextInt();
        number2 = scan.nextInt();
        
        result = number1 + number2;
        
        System.out.println("Sum of two number : "+result);
        
    }

}
        
  

Write a program that calculate percentage marks of the student if marks of 6 subjects are given.

  
         
import java.util.Scanner;
public class Program_2 {

    public static void main(String[] args) {

        int marks[] = new int[7];
        int total = 0;
        float percentage = 0;

        Scanner scan = new Scanner(System.in);
        for (int i = 1; i <= 6; i++) {
            marks[i] = scan.nextInt();
        }
        for (int i = 1; i <= 6; i++) {
            total = total + marks[i];
        }

        percentage = (total * 100) / 600;

        System.out.println("Students percentage = " + percentage);

    }
}
        
  

Write a program to convert rupees to dollar. 60 rupees=1 dollar

import java.util.Scanner;

public class Program_1 {

    public static void main(String[] args) {

        int rupees;
        double dollar;

        Scanner scan = new Scanner(System.in);

        rupees = scan.nextInt();

        dollar = rupees / 60;

        System.out.println(rupees + " Rupees = " + dollar + " Dollar");

    }
}