For that, you need to use ActionListener, for example: JButton b = new JButton(“push me”); b.addActionListener(new ActionListener() { @Override public void actionPerformed(ActionEvent e) { //your actions } }); For generating click event programmatically, you can use doClick() method of JButton: b.doClick();
For that you need to add change listener (a DocumentListener which reacts for change in the text) for your JTextField, and within actionPerformed(), you need to update the loginButton to enabled/disabled depending on the whether the JTextfield is empty or not. Below is what I found from this thread. yourJTextField.getDocument().addDocumentListener(new DocumentListener() { public void changedUpdate(DocumentEvent … Read more
That is not border. It’s focus. You can remove it using: jButton1.setFocusPainted(false);
This is way harder in Swing than it needs to be. So instead of pointing you to tutorials I’ve created a fully working example. import javax.swing.*; import java.awt.*; import java.awt.event.ActionEvent; import java.awt.event.MouseAdapter; import java.awt.event.MouseEvent; public class ToolbarDemo { public static void main(String[] args) { final JFrame frame = new JFrame(); frame.setPreferredSize(new Dimension(600, 400)); final JToolBar … Read more
just do this: button.setVerticalTextPosition(SwingConstants.BOTTOM); button.setHorizontalTextPosition(SwingConstants.CENTER);
Two ways: 1. Implement ActionListener in your class, then use jBtnSelection.addActionListener(this); Later, you’ll have to define a menthod, public void actionPerformed(ActionEvent e). However, doing this for multiple buttons can be confusing, because the actionPerformed method will have to check the source of each event (e.getSource()) to see which button it came from. 2. Use anonymous … Read more
Image img = icon.getImage() ; Image newimg = img.getScaledInstance( NEW_WIDTH, NEW_HEIGHT, java.awt.Image.SCALE_SMOOTH ) ; icon = new ImageIcon( newimg ); from http://www.coderanch.com/t/331731/GUI/java/Resize-ImageIcon
You can use java.util.prefs package. A simple example: // Retrieve the user preference node for the package com.mycompany Preferences prefs = Preferences.userNodeForPackage(com.mycompany.MyClass.class); // Preference key name final String PREF_NAME = “name_of_preference”; // Set the value of the preference String newValue = “a string”; prefs.put(PREF_NAME, newValue); // Get the value of the preference; // default value … Read more
If you want to create a CustomButtonUI then you have to look deepest to the BasicXxxUI. overide List of Colors from JButton Note there isn’t paintComponent(). It’s wrong, just use the paint() method, Below is just a simple example if that is possible (for Metal JButton). Note just for Metal LaF, I’m so lazy and … Read more
button.setOpaque(false); button.setContentAreaFilled(false); button.setBorderPainted(false);