Get Character Count And Amount Of Vowels In String Array?

Jan 29, 2015

I have to write some code to take names from the user and then order them in alphabetical order and then print them out which i have managed to do. However, i can't get it to count the characters in the names that the user enters or count the amount of vowels in the names.

This is the code ive written:

import javax.swing.JOptionPane;
import java.util.Arrays;
String[] names = new String[9];
int i;
names[0] = JOptionPane.showInputDialog("Please enter a name");
names[1] = JOptionPane.showInputDialog("Please enter a name");

[code]....

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Trying To Count All The Vowels In A String

Feb 13, 2015

I am currently trying to count and display all the vowels in a set of given strings and can't seem to figure out what to do. I was able to print the line with the most vowels, but i also need to display them. The code is listed below and the given output.

public class Strings
{
public static void main(String[] args) {
String sentence = "I am currently studing Computer Science."
+ "My name is whatever and I am orginaially from the state of Virginia."
+ "I recenetly separated from the Air Force where I served on the Presidental Honor Guard.";

[Code] ....

The output that i am getting is:

I am currently studying Computer Science .
My name is whatever and I am originally from the state of Virginia.
I recently separated from the Air Force where I served on the Presidential Honor Guard.

The line with most vowels is:

I recently separated from the Air Force where I served on the Presidential Honor Guard.

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Read Through A String / Count How Many Vowels There Are And Print Out When Detected

Sep 15, 2014

So I need to write a program that reads through a String and counts how many vowels there are and prints them out as it finds them. This is what I have so far:

if (vowel == 'a' || vowel =='e' || vowel =='i' || vowel == 'o' || vowel == 'u'){
numberOfVowels++;
}

The problem is that I can't figure out how to print out the character once it detects it as a vowel.

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Count And Display Number Of Times Specified Character Appears In String

Mar 7, 2014

Write a program using a while-loop (and a for-loop) that asks the user to enter a string, and then asks the user to enter a character. The program should count and display the number of times that the specified character appears in the string. (So, you will have two separate program codes, one using a while-loop and the other one using a for-loop.)

Example:
Enter a string: "Hello, JAVA is my favorite programming language."
Enter a character: e
The number of times the specified character appears in the string: 3

I don't even know where to begin I've only got this

import java.util.Scanner;
 public class letterCounter {
 public static void main(String [] args) {
Scanner sc = new Scanner(System.in);
System.out.println("Enter a string");
String myString = sc.nextLine();
System.out.println("Enter a letter");
String letter = sc.nextLine();
}
}

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Program That Read TXT File And Count Character Occurrence In String

Jan 12, 2014

I wrote a program to read a .txt file and return how many times a, e, s, and t occur in the .txt file. I am getting an error that I do not know how to fix. It says Error: FileNotFoundException cannot be resolved to a type...

import java.util.Scanner;
import java.io.File;
import java.io.IOException;
import java.io.BufferedReader;
public class Count
{
public static void main (String[] args) throws FileNotFoundException {
String phrase; // a string of characters

[Code] ....

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Count Vowels In ArrayList Of Strings - N Cannot Be Resolved To A Variable

Sep 11, 2014

What I'm trying to do here is to count the vowels in an arraylist of strings. What I did may not be right, but that's not my problem for now. My problem is that i cannot return the value (n) I want to return. I don't know why.

import java.util.*;
import java.util.Arrays;
public class One {
public static void main(String[] args) {
ArrayList<String> list = new ArrayList<String>();
list.add("aaa");
list.add("brr");
list.add("unn");
System.out.println(vowels(list));

[URL] ....

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String Array Unique Count?

Jun 9, 2014

I am attempting to count the unique strings (a.k.a flowers) in the array along with a count of any duplicates. An example is embedded in my code below. I've only pasted the part of the program I am having trouble with. I can't figure out what I am doing incorrectly.

private void displayFlowers(String flowerPack[]) {
// TODO: Display only the unique flowers along with a count of any duplicates
/*
* For example it should say

[Code]....

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String To Character Array Conversion

Jul 17, 2014

How I can convert a string into a character array without using toCharArray???

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Count Occurrence Of A String In Array List?

Jan 31, 2014

How to count occurrence of a string in a string array list. I have 800,000 strings in string list..

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Count Number Of Occurrences Of A String In Array List?

Apr 6, 2015

I am trying to count the number of occurrences of a string in an array list. I used the following code:

int count = Collections.frequency(strings, search);

strings is the name of the array list and search is the string that I am trying to count the number of occurrences of. My program compiles correctly, but when I enter the string to search for, I get the following error: "Exception in thread "main" java.lang.NullPointerException at java.util.Collections.frquency(Collections.java:37 18)

Why am I getting this error message and how do I fix it?

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Method For Counting Vowels In A String

Nov 21, 2014

I have to take a user's input and count the number of vowels in a String. If I start with a lowercase vowel it gets counted, but if I start with an uppercase or different letter I get nothing. Either way, I can not get the counter to go higher than 1.

import java.util.Scanner;
public class countVowels
{
public static void main(String[] args)
{
Scanner kb=new Scanner(System.in);
System.out.println("Enter a sequence of letters:");
String letters=kb.next();

[code]...

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Recursive Method To Remove Vowels In A String

Oct 22, 2014

Write down a recursive method to remove vowels in string ....

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Program To Count Character Word And Line From A File?

Dec 27, 2014

public static void main(String[] args) throws FileNotFoundException, IOException{
// TODO code application logic here
FileReader fr = new FileReader("gautam.txt");
BufferedReader br = new BufferedReader(fr);
  int line = 0;
int word = 0;
int character = 0;
String s;
while((s=br.readLine())!=null)

[code]...

how to count the character from file

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Swing/AWT/SWT :: How To Update Character Count As User Is Counting

Mar 16, 2014

i need a password program that does the following:

- only shows the character count
- toggles between seeing the actual letters and character count in the text field with a button

i don't know how to update the character count as the user is counting.i read the oracle tutorial, and i have a vague idea that i'm supposed to use Document Listener but i'm quite clueless here.for the second part i'm thinking about using white space for the masking character and unmasking the field.

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Using Count Element Method To Count Occurrence Of Characters In Array

Jun 30, 2014

I have an array with the following characters {'E', 'L','E','P','H','A','N','T','P','O'}

now, I need an array that will store the first array such that only the occurence occurs e.g {'E','L','P','H','A','N','T','O'} Notice that the characters 'E' and 'P' occur twice and as a result were not repeated the second time in the new array.

How would one go about this using the counting elements technique?

I tried this but not sure how to use the counting elements technique.

char [] arr = new char{'E', 'L','E','P','H','A','N','T','P','O'};
char[] bucket = new char[(arr[0] * arr.length)];
for (int i = 0; i < len; i++)
bucket[arr[i]]++;

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How To Find XOR Value Of Character Of Character Array In Java

Mar 3, 2015

What I am trying is find the XOR value between charcters of a String here is my code

public static void main(String[] args) {
System.out.println(grayCode("100"));
}
public static String grayCode(String input){
StringBuilder temp=new StringBuilder();
temp.append(input.charAt(0));
for(int j=1;j<input.length();j++){
char previous=input.charAt(j-1);
char current=input.charAt(j);
char xorVal=(char)(previous^current);
temp.append(xorVal);
}
return temp.toString();
}

but I am not getting actual XOR value of two charcters that I am trying to get.

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Array With Occurrences - Gather Sales Amount For The Week

May 3, 2014

Here is what I'm trying to do using arrays.

gather sales amount for the week
display the total of sales
display the average of sale
display the highest sale amount
display the lowest sale amount

using occurrences determine how many times the amount occurred for the week

make a sales main
make a sales data

This is what i have so far but I'm confused on how to start the occurrence and where it would be placed in order to get the information from the array

public class SalesData {
private double[] sales; // The sales data
/**
The constructor copies the elements in an array to the sales array.
@param s The array to copy.
*/
public SalesData(double[] s) {

[Code] .....

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User Should Be Able To Enter Amount Of Digits Array Should Be Shifted Left

Nov 6, 2014

This is the other code problem I have. The user should be able to enter the amount of digits the array should be shifted left. For example, if the user entered 3 and the array was 1 2 3 4 then it should return 4 1 2 3. here is my code.

public char[] replaced(char[] array, char oldChar, char newChar) {
char myFun[] = new char[array.length];
for (int i = 0; array.length > i; i++) {
myFun[i] = array[i];

[code]....

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Splitting A String By Character

Feb 14, 2014

I'm trying to use the split method to split a string for a calculator, but it keeps throwing this Exception:

Exception in thread "main" java.util.regex.PatternSyntaxException: Dangling meta character '+' near index 0
+

public class exp {
private static String ques="88+12";
private static String [] splitCalc;
public static void main(String[] args) {
splitCalc = ques.split("+");
for(String s : splitCalc){
System.out.println(s);
}
}
}

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Removing A Character From String?

Sep 26, 2014

I am trying to remove a character from string as below

public String reomveChar(String str, int n) {
if(0<=n & n<=(str.length()-1)){
//str.charAt(n)
char o=str.charAt(n);
return str.replace("o","");
//a.replace("o","");
}
return null;
}'

what is the best way to remove it.

If i call like

removeChar("hello", 1) i should see hllo.

When there are more than one way to do a challenge in java which one to choose as best way.

What is the criteria to decide one particular way of writing code is best among say 'n' different number of ways.

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How To Retrieve A Character From String

Mar 7, 2014

String charAt() method returns a particular Character at the specified index in the String.

How is this function implemented internally?. How a particular character can be retrieved from String?.

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Swapping String First And Last Character?

Sep 28, 2014

I am trying to swap given string first and last character. If I pass world i should get 'dorlw'

I found link and code [URL]....

String str="hello";
char[] charArray=str.toCharArray();
int indexOfLastChar=charArray.length-1;
for(int i=0;i<charArray.length/2;i++){
char temp=chatArray[i];
charArray[1]=charArray[indexOfLastChar-i];
charArray[indexOfLastChar-i]=temp;
}
String reversedStr=new String(charArray)
System.out.println("reversed string"+str+reversedStr);

I wonder Is there is any easy simple way to do it.

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Count Length Of Each Word In A String

Aug 5, 2014

I am looking for a way to create a method with the initial state in while loop, which will count the length of each word in a string using I want the output to be something along the lines of:

hello world how are you
There are 0 words of length 0
There are 0 words of length 1
There are 0 words of length 2
There are 3 words of length 3
There are 0 words of length 4
There are 2 words of length 5

This is my code so far it sort of does the job but not the way i want it too

import java.util.Scanner;
import java.util.StringTokenizer;
public class Brown_Matthew_13117002{
public static int count(String s, int len){
int result=0;
StringTokenizer st=new StringTokenizer(s,"[ ,;]");

[Code] ....

The output would end up being :

hello
There are 0 words of length 0
world
There are 0 words of length 1
how
There are 0 words of length 2
are
There are 3 words of length 3
you
There are 0 words of length 4

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Unable To Count Each Char In A String

Jun 5, 2014

I am trying to count each char in a string. For example A = 1, B =2, C=3, I am not looking for their binary value. So the word "At" would

AT= (A=1 +T=20)=21.

I know how to do this in C++ because I am able to treat a string like an array.

Java Code: void printFile()
{
int sum=0;
String line;
for(char cr ='A';cr<'Z';cr++)
{
for(int i=0; i<myList.size();i++)

[Code]...

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Using String Methods To Count Words?

Nov 3, 2014

Aeparated by blanks in a string. For simplicity, use strings without punctuation or other white space characters(tabs, newlines etc). Use a JTextArea to allow the user to enter the text and allow the text area to scroll if necessary. when the user clicks a button to count the words , the total number of words counted is displayed in a textbox that cannot be modified by the user.

now my problem is that i am not getting the counted number to display in the un-editable textbox. i also have the problem where the cusrsor is showing in the middle of the input screen instead of at the top.

import java.io.*;
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import java.text.*;
import java.util.*;
public class WordCounter extends JFrame implements ActionListener

[code]....

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Count The Length Of Each Word In A String

Jul 31, 2014

I am looking for a way to create a method with the initial state in while loop, which will count the length of each word in a string using I want the output to be something along the lines of:

hello world how are you
There are 0 words of length 0
There are 0 words of length 1
There are 0 words of length 2
There are 3 words of length 3
There are 0 words of length 4
There are 2 words of length 5

ithis is my code so far it sort of does the job but not the way i want it too

import java.util.Scanner;
import java.util.StringTokenizer;
public class Brown_Matthew_13117002{

[Code].....

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