How to use validation on a label or textfield in java.
I have a textfield and i want that only username with @ sign will be taken by the program or gives an error.or a textfield that can only take numeric values or whatever the developer wants to take from user..
I need a code to get a text from a textField to a label but the label is on a different frame, i will give u an example of what i have so far. so this is the main:
package albaestate;
public class AlbaEstate {
public static void main(String[] args) {
Frame1 first = new Frame1();
first.setVisible(true);
}
/*[B]now i have the first frame where i input the information[/B]*/
package albaestate;
public class Frame1 extends javax.swing.JFrame {
public Frame1() {
initComponents();
[Code] ....
What i need is to input the code so that in jLabel5 i get the text from jTextField1 in Frame1; in jLabel6 i need the text from jTextField2 also in Frame1; and in jLabel7 i want to display the calculation of what the jbutton1 in Frame1 is calculating.
I'm doing a software Java GUI - JFrame form like this:
1. The user wants to click on a button that opens a bunch of images that will be displayed as thumbnail in the bottom of the JFrame .
2. Then the user wants to select/click one of the thumbnail and make appear the corresponding image in it's original size on above(center) of the JFrame.
For doing this I used 3 JPanel.
One contains a JButton that opens the jfilechoser dialog window,
the second "panelPreview" is for putting the thumbnails created,
and the third "panelGrande" is for the image in it's original size.
The firs part "1." is ok.
But in the second part : I got one error when I want to put the ImageIcon in to the JLabel with the further intent of displaying it.
lblBig(imgIcoVett[i]);
In this project I'm dealing with arrays of ImageIcons and JLabels, so it's a bit advanced level for me, so I'm not sure that I wrote right the part of the MouseListener too.
The error displayed by netbeans says "cannot find symbol symbol: method lbl (ImageIcon) local variables referenced from an inner class must be final or effectively final"
Here I attach the project I did with netbeans"AAAD Unlayout 2.zip", but if you just need the highlight of the code, here it is too:
private javax.swing.JButton btnOpenfile;
private javax.swing.JFileChooser jFileChooser1;
private javax.swing.JPanel jPanel1;
private javax.swing.JLabel lblBig;
private javax.swing.JPanel panelGrande;
private javax.swing.JPanel panelPreview;
[Code] ....
package name;swing library found in javax called to use the graphical contents.
import javax.swing.*;
//creating the contents for the calculator
public class calc {
JButton btn1= new JButton("1 ");
JButton btn2= new JButton("2");
JButton btn3= new JButton("3");
[code]....
I have tried different sizes for the 'TextField' but when I change the size, the position changes instead of the size itself.
How can I make the numbers to stay at the textfield of my calculator instead of disappear like when I type 1 then hit the + sign the number 1 disappears from the textfield I would like to have this (1+1) showing in the text field and also if try to press only + , * , - , / to show error.
this is my code
public class Calculator extends javax.swing.JFrame {
private double TEMP;
private double SolveTEMP;
Boolean addBool = false;
Boolean subBool = false;
Boolean divBool = false;
Boolean mulBool = false;
String display = "";
[Code] ....
How do you do validation in java for primary key lets say the table got combination of two columns as primary key,how can i validate that if use enter already existing value...
View Replies View RelatedI want to validate an email input. The email input can only have one @ and at least one '.' after the @. I would like to ask if my regex pattern is correct.
YOUR CODE HERE
import java.util.InputMismatchException;
import java.util.Scanner;
public class email
{
public static void main(String []args) {
[Code] ....
I just want to add a text field and a label next to it that says "Hourly Wage".
Also, when I run this in Xcode, it reports back with "Shell Script Invocation Error" "Command usr/bin/java failed with exit code 1".
Here's my program:
package summerIncome;
import java.util.Scanner;
public class SummerIncomeCalculator {
public static void main(String[] args) {
jFrame frame = new Jframe("Summer Income Calculator");
frame.setSize(400,300);
[Code] .....
try {
System.out.println("1");
int row = jTable4.getSelectedRow();
System.out.println("row");
String str = (jTable4.getModel().getValueAt(row, 0).toString());
[Code] .....
I select the first row the value is 0
I select the second the value is still 0
Getting this error message.
non-static variable Text1 cannot be referenced from a static context
Text1 - a TextField on Form
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?
When in panel2 i type something in the search bar and then i move mouse cursor to panel1 and try to edit a JTextField input for example as in the picture 0.0 nothing happens but the mouse cursor is correctly show up in the JTextField.. What seems to solve the problem is to click anywhere outside of the application window.. but of course this is not a solution !
View Replies View RelatedI am working on a keypad for a phone app for school. I cannot get the numbers from the keys to show up in the textField. I have made multiple tweaks, but think maybe my case statement is the problem?We did a calculator application in the class, so I have based my code off of that. Although the telephone keypad seemed much simpler to code, I can't seem to get the numbers to show up.
public void actionPerformed(ActionEvent e) {
//test for button clicks
foundKey = false;
//search for clicked key
for (int i=0; i<keys.length && !foundKey; i++)
[Code] ....
I have 1 textfield and 1 button on a JFrame and having 10 such frames stored in ArrayList al and getting the JFrame instance from traversing the ArrayList at execution time ,So is there a way to access textfield using JFrame instance or i have to name the textfield diffrently 10 times for each frame .
View Replies View RelatedTrying to make a swing box where you can type in string data to the text field and a button. I want the string data to be added to a list everytime you press the addbutton.
Here is the code:
PHP Code:
package GUI;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.util.ArrayList;
import java.util.List;
import javax.swing.JButton;
[code]....
I need to set a limit when a textfield is typed, I don't know where to start to do this validate.
Any way to do it. or can you take me to the correct path.??
How to do this <not in sql> .
View Replies View RelatedI have a Panel in JFrame which consists of a TextField. I want this text field to be initially focused when GUI starts so that i should not have to first click in it before writing something.
I've tried:
textField.requestFocus();
textField.requestFocusInWindow();
textField.grabFocus();
but of no use. What should i use ?
I am having a small JavaFX program where I try to set a value to TextField. Below is the part of FXML file and highlighted is the Textfield ....
fxml file
<AnchorPane minHeight="0.0" minWidth="0.0" prefHeight="185.0" prefWidth="598.0">
<children>
<TextField fx:id="actiontarget" editable="true" layoutX="146.0" layoutY="73.0" prefWidth="198.0" text="" />
[Code] ...
I want to display a string value to that text field.
So, I am using that fxid (actiontarget)
But actiontarget.setText (pathofFile) is not working .
Nothing displays and no value sets for the Text field.
How can I set value in that text field through above code.
How to use the textformater class together with a TextField. I need to filter and format a currency value in a TextField an try it with the text formater, but I'm not really successful at the moment.
View Replies View RelatedI have a problem about read text file in array and show it to textfield :
Content the file:
I want read line 1 to textfield 1, line 2 to textfield 2,....
What would be the simplest way of creating a Dialog that can add TextField dynamically based on whether a radio button option from the dialog box is selected. I thought of JOptionPane.showMessageDialog and adding a JComponent though I would not be able to add a TextField on the fly and I would not be able to add ActionListeners. The dialog would initially contain some radio buttons, labels and textfields.
View Replies View RelatedI've done a lot of hardwork for this assignment but I don't know what's why the second textfield which is for output is blank.
All I want is to get the input from user in textfield a and display it in textfield b in lower case.
public void KeyPressed (KeyEvent ke) {
String letter2="";
if(ke.getKeyCode()==KeyEvent.VK_A)
{
letter2=letter2+"a";
btextfield.setText(letter2);
[Code] .....
I can't seem to put a label on this code:
import java.applet.*;
import java.awt.*;
import java.awt.event.*;
public class number2 extends Frame {
int x = 0;
int y = 0;
public void run() {
addMouseListener(new mymouselistener());
[code]....
how would I put a label on it?
I need to write an input validation while using the do-while statement. I feel like most of it is good except that it gets stuck inside the brackets of the do statement. After I enter an input, it just keeps asking me over and over for an input. Then I have to make it s if you enter an input that is out of range, you have to keep entering an input until it is in range.
Java Code:
do
{
System.out.print("Please enter the amount of spaces the letters will shift... ");
shift = uInput.nextInt();
} mh_sh_highlight_all('java'); Java Code: public class ShiftEncoderDecoderDriver
{
public static void main(String[] args)
[code]....
I am trying to add a label to my gui, i am using the following code but it is not showing.
contentPane = this.getContentPane();
contentPane.setBackground(Color.GREEN);
contentPane.setLayout(null);
JLabel greeting = new JLabel("hello");
greeting.setFont(new Font("SansSerif", Font.PLAIN, 18));
contentPane.add(greeting);
greeting.setVisible(true);