Write GUI Program To Convert All Lowercase Letters In String To Uppercase?

Mar 21, 2015

Write a GUI program to convert all lowercase letters in a string to uppercase letters, and vice versa. For example, Alb34eRt will be converted to aLB34ErT.

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GUI Program To Convert All Lowercase Letters In A String To Uppercase Letters

Mar 21, 2015

Write a GUI program to convert all lowercase letters in a string to uppercase letters, and vice versa.

For example, Alb34eRt will be converted to aLB34ErT.

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How To Ignore Lowercase And Uppercase Letters

Oct 18, 2014

I have made a program, where the user types in a letter M, C or I to identify their major, if the user types m, c or i, my code does not work.

How could I make my program ignore if the letter is upercase or lowercase? My code is posted below. Can I do this in any easier way then adding this type of code for each lowercase letter?:

Java Code:

if (s.charAt(0) == 'm')
System.out.print("Mathematics "); mh_sh_highlight_all('java');

My current code:

import java.util.Scanner;
public class c4e18 {
public static void main(String[]args){
Scanner input = new Scanner(System.in);
System.out.print("Enter two characters: ");
String s = input.nextLine();
if (s.charAt(0) == 'M')

[Code] .....

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Transfer Lowercase Letters Not Convert

Aug 20, 2014

I am trying to sort out all lower case letters out of my text file into a new file. I am not very good with char values. My text file that is being read says

AaBbCcDdEeFfGgHhIiJjKkLlMmNnOoPpQqRrSsTtUuVvWwXxYyZz.

I just need it to write out all the lower case. The code below is what I have to read and write the file.

import java.io.File;
import java.io.FileNotFoundException;
import java.io.FileWriter;
import java.io.IOException;
import java.io.PrintStream;
import java.util.Scanner;
public class Lower {
Scanner in=new Scanner(System.in);
FileWriter filw;
String fr;

[Code] .....

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Read Line Of Text And Output Text First In All Uppercase And Then In Lowercase Letters

May 29, 2014

Write a program that reads in a line of text and then outputs that line of text first in all uppercase letters and then in all lowercase letters.

INPUT and PROMPTS. The program prompts for a line of text as follows: "Enter the text: " and then reads in an entire line of text as a String .

OUTPUT . There are four lines of output . The first line is "The text in all upper case is: ". The second line is the line that was read in, displayed in all uppercase. The third line is "The text in all lower case is: " and the fourth line is the original line that was read in, displayed in all lowercase.

CLASS NAMES. Your program class should be called ShoutAndWhisper.

This is what I have so far:

import java.util.Scanner;
public class ShoutAndWhisper
{
public static void main(String[] args)
{
Scanner scannerObject = new Scanner (System.in);
System.out.println("Enter the text: ");
scannerObject.next();
System.out.println("The text in all upper case is: ");

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Validate String Whether It Is Combination Of Lowercase And Uppercase And Has Character

Jun 22, 2014

I have to validate a string whether it is a combination lowercase and uppercase and has the character '_'.

I m having trouble in framing the expression for these conditions in the matches function.

How it can be done..?? How to frame a the correct expression.

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Capitalize Method - Return String With First Letter In Uppercase And All Other In Lowercase

May 19, 2015

I'm trying to create a private method called capitalize() which takes String nameModel in any uppercase/lowercase combination and returns it with the first letter uppercased and all other lowercased. E.g. "stePHeN" returns "Stephen" . This is what I've written so far:

private String makePrettyString(String modelName) {
if (modelName ==null) {
return null;
}else if (modelName =="") {
return "";
} else{
return modelName.substring(0,1).toUpperCase() + modelName.substring(1).toLowerCase();
}
}

Unfortunately it doesn't work and it still returning me the String modelName in its original uppercase/lowercase combination.

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Convert The First Letter Of Every Word In A String To Uppercase?

Sep 20, 2014

I'm trying to convert the first letter of every word in a String to uppercase. I've managed to isolate the first letter of every word and then make it uppercase but I don't know how to replace it.

public static StringBuffer makeUpperCase(){
String str = String.valueOf(input2);
for(int i = 0; i < str.length(); i++){
if(str.charAt(i) == ' '){
char var = str.charAt(i + 1);
var = Character.toUpperCase(var);
System.out.println(var);
}
}

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Textfield Lowercase And Uppercase

Feb 19, 2014

String sql = "SELECT * FROM user WHERE username =? and password =?" ;
pst = conn.prepareStatement(sql);
pst.setString(1, username.getText());
pst.setString(2, password.getText());
rs = pst.executeQuery();
if(rs.next()){
do somethig;
{

I have 2 textfield that take username and password, on the database thete is a user table

id username password name surname

1 test test test test

people put username and password to the textfield like test test and they logon,but when they write username = TESt and password = teST they can logon too,there is no TESt user on the database or teST password, is the textfield making lowercase all text. or pst.setString(1, username.getText()); is this code changing the text?

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Write A String Name Variable To Store Letters / Dotes And Spaces Only In Java?

Apr 5, 2014

I am trying to write a program and the name variable can only store letters,dotes and spaces. But whenever I enter a space, the program doesn't work. Following is my code.

import java.util.Scanner;
import java.util.*;
public class Space {
public static void main(String []args) {
Scanner reader = new Scanner(System.in);

[Code] ....

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Sorting Lowercase Strings Before Uppercase Strings

Mar 26, 2014

I can sort strings in a collection by uppercase and then lowercase though I was wondering if there is any way of doing it in reverse, sorting by lowercase then by uppercase.

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Java Program To Count Each Repeated Letters In Given String?

Jan 12, 2014

for example if the given string is: The world is running java technology?

Ans:
T is =2
h is=2
e is=2
w is=1
n= 4

like wise i need out put of the program?

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Uppercase Character Counter In A String

Jun 11, 2014

I have to create a code that can calculate the number of upper case letters in a string that is entered by the user (below.)

Java Code:

import javax.swing.JOptionPane;
public class mainClass {
public static void main (String [] args) {
String userInput;
userInput = JOptionPane.showInputDialog("Enter a string.");

[Code] ....

My issue is that I would like the program to be able to function properly when spaces are entered into the string. As it is right now, I believe it is only processing the first string entered into the input box.

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Write A Program That Use Java String Class Methods

Feb 10, 2015

There are two versions

1. The words remain in their places but the letters are reversed. Eg I love you becomes Ievol uoy
2. The words are also reversed. Eg I love you becomes uoy evol IWrite a program that use the java String class methods.

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Method Creation - Take A String With Duplicate Letters And Return Same String Without Duplicates

Nov 7, 2014

How can I write a method that takes a string with duplicates letters and returns the same string which does not contain duplicates. For example, if you pass it radar, it will return rad. Also i would like to know how can I Write a method that takes as parameters the secret word and the good guesses and returns a string that is the secretword but has dashes in the places where the player has not yet guessed that letter. For example, if the secret word is radar and the player has already guessed the good guesses letters r and d, the method will return r-d-r.

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Reverse Letters In A String

Apr 19, 2014

I am trying to reverse a string. Here is my code:

import java.util.*;
public class ReverseLettersInString {
public static void main (String[] args){
Scanner in = new Scanner (System.in);
String s;

[Code] .....

PROGRAM OUTPUT:
Enter string
me
e

The program returns e instead of em

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String Method That Creates A Word Out Of Given Letters?

Jan 25, 2015

I want to make a method that takes a word and then checks if the word can be created from available letters. For example, if a word "johnson" can be created by using letters "jashoqwnon".

Now my goal is to make sure that if available letters contain a letter from the word, that letter is put into a String called result and then erased from the list of given letters. So, "johnson" and "jashoqwn" would produce the result "johns" and leave "aqw" unused.

Now the problem that I am facing is that I can't get Java not to use the same letter twice. So "johnson" and "jashoqwn" still gives "johnson".

I've tried everything in my power but I am missing something. Here is my code.

public static String makeAWord(String word, String letters){
String result = "";
for(int i = 0; i < word.length(); i++){
for(int j = 0; j < letters.length() ; j++){

[Code] ....

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How To Edit Last 3 Letters Of A String Retrieved From Database

May 8, 2014

How to do this editing the last 3 letters of a string that i retrieve from database.. I have a string "111-222-333-000" here's the sample what i want to happen was to edit the last 3 letters of the string ,,

i insert into database "111-222-333-000" then i retrieve it for editing but what i want to happen is when i retrieve it what i can only edit was the last 3 strings only

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How To Check String For Exactly 2 Capital Letters And 1 Space

Jul 23, 2014

I started using Java a couple of days ago, If you haven't guessed I want to see if the user is typing a full name or not, but I'm actually not too concerned with any more complexity than I mentioned in the title. It's ok if an input like "GLba b" comes out positive.

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Create Binary Tree From A String Of Letters

Jun 15, 2014

Here is the problem:

Start with the tree.java program (Listing 8.1) and modify it to create a binary tree from a string of letters (like A, B, and so on) entered by the user. Each letter will be displayed in its own node. Construct the tree so that all the nodes that contain letters are leaves. Parent nodes can contain some non-letter symbol like +. Make sure that every parent node has exactly two children. Don’t worry if the tree is unbalanced. Note that this will not be a search tree; there’s no quick way to find a given node. You may end up with something like this:

It also says all Letters must be Leaves

Now I had it almost similar to that picture, but it wasn't right. So ive been working on it but im getting some very strange (and frustrating) output from the following methods.

Ive included the display method just for reference. The book told me to use it so I haven't edited it. I believe my main issue is with my (incomplete) insert() method. The output goes into an infinite loop despite having a return statement break the while loop when a character is inserted.

The way I see to solve the problem is just add a (+) whenever a new subtree needs to be created. Say I add A and B, then it first creates a subtree at the root with a (+) and afterwards lists A and B as its leaves. If I insert a C, it should be able to simply move to the right child of the root and deposit the C there.

package pkg4333_hwk1;

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.Scanner;

class Main {

[Code] ....

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Letters Of A String That Occur From Second Half Of Alphabet

Feb 11, 2014

Write a method named secondHalfLetters that accepts a string as its parameter and returns an integer representing how many of letters in the string come from the second half of the alphabet (that is, have values of 'n' through 'z' inclusive). Compare case-insensitively, such that uppercase values of 'N' through 'Z' also count. For example, the call secondHalfLetters("ruminates") should return 5 because the 'r', 'u', 'n', 't', and 's' come from the second half of the alphabet. You may assume that every character in the string is a letter.

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Program That Counts Number Of Individual Letters In A File

Dec 3, 2014

What my program needs to do:

1) accepts a filename from the user that indicates the input file
2)obtains a filename to use as the output file
3)the program then reads the file and reports how many of each letter are there in the file.
4)if the file could not be opened, you must ask the user for valid file name until one is given
5)once a valid file name is given, print all of contents and store the analysis of the file in the output file name specified

You will be reading the input from a file and printing the output to another file. For example, if the file input.txt contains:

This file contains lett3rs.
YoU counT Only lEtTers, not numb3rs.
How many h's are in "Ohhhhhhhhhhh no!"?

The program should ignore white spaces, new lines and other special characters or numbers. It should count only the letters (a-z and/or A-Z) in the input file.

An example execution might look like this:

Input a file name: notAFile.txt
Invalid filename given. Input another.
Input a file name: alsoNotAFile.txt
Invalid filename given. Input another.
Input a file name: input.txt

[Code] ....

1)The last try/catch block was given by my professor, however the only thing it does is print out "hello java" into an out file. How would I make it print out similar to that of the given example?

2)I figured out how to make the array print out ABCDEFG... etc...how to count the amount of them.

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How To Convert Numeric String To Formatted String

Sep 11, 2014

I have a string value returned from a background tool that will range from 0 to possibly terabytes as a full number.  I want to format that number to use commas and to reduce the character count using an appropriate size modifier (KiB, MiB, GiB, etc).  I've tried converting the string number to a Double value using Double.parseDouble() and then performing the math based on the size of the value with this code:
 
Double dblConversionSize;
String stCinvertedSize;
dblConversionSize = Double.parseDouble(theValue);
if (dblConversionSize > (1024 * 1024 * 1024))
     stConvertedSize = String.format("%,.000d", dblConversionSize / 1024 / 1024 / 1024) + " TiB";
...
 
I've also tried using
 
     String.valueOf(dblConversionSize / 1024 / 1024 / 1024) + " TiB";
 
However, the formatting is failing and I'm either getting a format exception or the result is displayed as a number with no decimal component.

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Cannot Convert From String To Boolean And Int To String

Apr 6, 2014

I have errors in the "if" and both "else if" ... The compiler says "cannot convert from String to boolean and int to String ...

instructions:

1. Add two private instance variables, String courseName and char grade to this class.

2. Add accessor and mutator methods for these instance variables.

3. Add a method register which receives an integer data type and returns String data type according to the argument passed to it ("Math" for 1, "English" for 2, "No course" for any other input)

What I have so far:

package assignment9;
 public class BannerUser
{
private int userId;
public int getUserId()
{
return this.userId;
}
public void setUserId(int userId)

[Code] ......

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Convert Int To String

Nov 17, 2014

How can i convert int to string ? The error I get is count cannot be resolved.

System.out.print("How many days?: ");
numberOfDays = keyboard.nextInt();
for(int count = ':';count <=memberCount; count++ )
System.out.print("What is band member # " + "'s name?");
memberName = keyboard.nextLine();
System.out.print("What is"+ memberName+"'s instrument?");
instrument = keyboard.nextLine();
members +=(count.toString() +":" + memberName +" -" + instrument + "" );

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How To Convert String Into Int

Apr 16, 2014

I created a word object representing a specified string under my public class word method such as

Word w = new Word("Blue");

now I am required to return a hashcode for this word, which is an integer based on the words instance data under the method called

public Word(String w);
{
}

I am not sure how to convert the string into an int so I would be able to return a hashcode.

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