jtextfield

问题 I am trying to create 4 JLabel components 4 JTextfield components for my Swing based application. I am adding these lables and text fields in one of the many panels of the application. The class for this panel is as follows: public class CustomerInfoPanel extends JPanel implements ActionListener { private Car[] carList; private CarSalesSystem carSystem; private int currentIndex = 0; private JLabel headingLabel = new JLabel("Enter your details and let us find a car for you"); private JLabel

问题 I am trying to insert data typed in by user in SQL Server table using below code, the code runs without any error but data is not inserted. try { Class.forName(driver); Connection con=DriverManager.getConnection(url, user, pass); String sql="insert into inventory" +"(Product_Code,Product_Name,Quantity,Cost)" +"value(?,?,?,?)"; PreparedStatement pst=con.prepareStatement(sql); pst.setString(1, product_code.getText()); pst.setString(2, product_name.getText()); pst.setString(3, quantity.getText()

问题 When I Change The Font Of My JTextField The Actual JTextField Resizes, Any Help? I am working on a calculator and obviously based on how bad the code is you can tell the I am a noob Any Help Would Be Appreciated CODE: import java.awt.BorderLayout; import java.awt.Color; import java.awt.ComponentOrientation; import java.awt.Container; import java.awt.Dimension; import java.awt.FlowLayout; import java.awt.Font; import javax.swing.JButton; import javax.swing.JFrame; javax.swing.JTextField;

问题 I am trying to change the text colour in JTextfield using the JButton but somehow i am not able to find the specific function to do so. Any help would be appreciated. Thanks. Also it would be a real help if i could get the source from where i could search different functions with their use, used in java. 回答1: I am trying to change the text colour in JTextfield using the JButton but somehow i am not able to find the specific function to do so. That's because there is no one "function" that

问题 I have the following JFormattedTextField try { MaskFormatter CabinNoTextF = new MaskFormatter("###"); CabinNoTextF.setPlaceholderCharacter(' '); CabinNoTextField = new JFormattedTextField(CabinNoTextF); centerPanelCabin.add(CabinNoTextField); addCabinF.add(centerPanelCabin); addCabinF.setVisible(true); } catch (Exception ex) { } CabinNoTextField is formatted to only allow three digits to be inputted within the text field. However, I want it so that the user can also enter a single digit as

问题 I am trying to display the entered text in both italic and bold form at the same time, but for some reason that condition is just not working. The text goes back to the first condition every time I check both the boxes. The code in the book is same as mine and also the codes on various websites seem to be the same too. I can't find the problem. I tried ^ and + instead of | between the 2 fonts, still not working. This is within the ItemListener subclass: Font f=null; // bold, italic - name of

问题 I am trying to get my JTextField ( desc ) to under the JSpinner , ( dayspinner ) but I'm not sure how. If I put the text field in SOUTH , it just goes all the way to the bottom of the window. I would also like to implement whatever solution there is to this problem with my beginning menu with the 3 buttons next to each other, I would much rather them be on top of one another. import javax.swing.*; import javax.swing.event.*; import java.awt.*; import java.awt.event.*; public class Scheduler {

问题 I need to create component that looks like JTextField (same borders, shadows, rounded corners etc) but for displaying some graphic with text. Is it possible to create something like renderer for a JTextField? Or Create custom component based on JPanel, but how to force it to looks same as JTextField Another complication is that application will be running on different LAF's changed on the fly. Do you have any ideas ? 回答1: No, Swing does not provide any DefaultTextFieldRenderer or

问题 I want to remove spaces from a JtextField, so when the user click the button it automatically removes the space from the text he/she wrote. 回答1: simply, you need to add an action listener to the button which the user is going to click. for example: the button will be for posting something. "POST" public class YourProject extends JFrame implements ActionListener{ JtextField text = new JtextField(); JButton post = new JButton("POST"); public YourProject(){ add(text); add(post); post

问题 After upgrading to java 1.8.0_40 from java 1.8.0_31 JTextFields are no longer accepting any input. Environment OS X 10.2.2 java 1.8.0_40 (the current build). iMac 4 GHz Intel Core i7. I'm using webstart to launch the apps. In order to test, I created a simple new project from the code downloaded from here: http://www.javabeginner.com/java-swing/java-jtextfield-class-example This sample code failed as well. In fact using the Oracle website examples fails to allow text field entry. You can test