Converting Char To Uppercase?

Jan 21, 2015

I'm trying to write something to will convert my Scanner input which will be either a string or a char toUpperCase but it is not working.
 
import java.io.File;
import java.util.Scanner; 
public class UpperCase {
 public static void main(String [] args) { 
Scanner kb = new Scanner(System.in);
char reply;

[code]....

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Converting Int To A Char

Mar 3, 2015

I was reading about the char data type in Java. I know that an unsigned 16 bit integer is used to represent a char. So we can write the assignments below:

char a = 65; // a will get the value 'A'

But the limit of the char value is 65535.

So I've tried out a few things with char and trying to understand them but I'm not sure how they work.

char a =(char) 70000;
char b = (char) -1;

In the first case I thought that 70000 % 65535 would happen internally and the unicode character present at that location would get stored in 'a' but if I do that I get the answer of 70000 % 65535 as 4465. But when I display 'a' it shows me the output as '?'. Clearly '?' isn't at 4465.

In the second case I have no clue what's happening but somehow when I display 'b' it shows me '?' again.

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Converting Char To Integer From File

Feb 28, 2014

I want to make a program that reads numbers from a text file and transforms them into integers and then displays on the screen, but i can not do this with numbers greater than ten as the read () method of the BufferedReader only reads character by character. If he has to read the number 34 or 2343, for example, i don't know how to turn that chars into a single integer value. How can i do this in a more elegant way than the way i show to you below? That was the solution i found, but i believe there is a cleaner and more elegant way of doing. I would also use the Integer and Character type to solve this problem. I'm trying to use less primitive data types. The following code works fine just with number 0 -> 99.

I would like to use Character and Integer now.

int number[] = new int[2];
int i, carac;
i = 0;
do {
carac = leitor.read();
if (carac != -1 && carac >= 48 && carac <= 57) {

[Code] .....

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Mar 29, 2014

I'm trying to convert all letters in a 2D char array into number. As results, I want a = 0, b=1, c=2, ... z=25.

Then, I tried this as part of my code:

char [][] letters = {{'i', 'u'}, {'a', 'g'}, {'e', 'k'}};
for (int i = 0; i < letters.length; i++) {
for (int j = 0; j < letters[i].length; j++) {
if (letters[i][j] >= 'a' && letters[i][j] <= 'z') {
letters[i][j] = (char) ((letters[i][j] - 'a') + '0');
}
}
}

The result of my code is not what I expected before.

From 'a' to 'j', it worked well. But, from 'k' until 'z' it didn't print expected number.

What's wrong with my code and what is the correct way to fix it?

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RegEx For Uppercase Alphanumeric

Apr 14, 2014

I am in need of regex for alphanumeric (uppercase only) values which will verify string of length 5below

ABCCD - False
AB12C - True
ABC12 - True
12ABC - True
12345 - False

If it contain any lowercase then it should result in false as well.

My regex ^[A-Z0-9]{5}$ is not working for above type of values.

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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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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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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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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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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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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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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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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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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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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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When casting a char which is read from a file to an int, can i assume that the mapping used will be ASCII? I've learned that unicode uses ASCII mappings for the characters that overlap.

Are there any other possibilities for int values of one character? I still have trouble understanding character encodings.

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Oct 14, 2014

I need making char[] to a string im not entirely sure what to change i'm just suppose to use a string value but the upperclassmen used char:

char[] number = clear.toLowerCase().toCharArray();
for(int c = 0; c < number.length; c++) {
if(digit[c] < 'a' || digit[c] > 'z')
continue;

[code]...

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String printingString = "a";
for (int i = 0; i < 50; i++)//loop to obtain 50 random characters
{
char randomChar = (char) ((Math.random() * 255) +32);
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printingString = Character.toString(randomChar); }
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E.g. charArray["!ollaH"] into charArrayNew["Hallo!"]

My first idea was to revert the stuff in the Array with a ! cause i saw earlier that u can work with that too revert booleans. Sadly i didnt happen to make it work.

Next thing i thought of was a for loop to go trough the charArray and copy every section into charArrayNew just at the opposite end.

Java Code:

import java.util.Arrays;
public class aufgabe43 {
public static void main(String[] asgr){
char[] charArray

[Code] .....

Eclipse doesn't show any errors, and as u told me last time i did include import java.util.Arrays; to output the array in the end.

When i try to compile the code eclipse returns with an error

Java Code:

Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException: 68
at aufgabe43.main(aufgabe43.java:8) mh_sh_highlight_all('java');

Which I frankly don't understand since the array . Length is exactly the same.

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Java Code:

//imports packages
import java.io.*;
import java.text.DecimalFormat;
class ModuleCulminatingTask {
public static void main (String args []) {
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[code]....

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public static void main(String[] args) {
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[code]....

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Java Code:

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}
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[Code] .....

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How can I get the Value as double when i used the char[] with size 2 or 4 ?

Example : final char[] charValue = { 'u', ' ', '}','+' }; what is the associate Double value ?

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Example : final char[] charValue = { 'T', ' ' }; what is the associate int value ?

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