Table of Contents
What do you mean by JButton in Java?
The class JButton is an implementation of a push button. This component has a label and generates an event when pressed. It can also have an Image.
What is the difference between button and JButton in Java?
JButton class provided by Swing is totally different from Button which is provided by AWT. It is used to add platform independent button in swing application. Swing buttons are extended from the AbstractButton class that is derived from JComponent. AbstractButton class implements the Accessible interface.
How do I make a JButton?
In short, to set action command for JButton one should follow these steps:
- Create a class that extends JFrame and implements ActionListener .
- Create a new JButton .
- Use JButton. addActionListener to add a specific ActionListener to this component.
- Use JButton.
- Override actionPerformed method and use ActionEvent.
What is JButton constructor?
Constructor and Description. JButton() Creates a button with no set text or icon. JButton(Action a) Creates a button where properties are taken from the Action supplied.
How do you use a JButton?
Java JButton Example
- import javax.swing.*;
- public class ButtonExample {
- public static void main(String[] args) {
- JFrame f=new JFrame(“Button Example”);
- JButton b=new JButton(“Click Here”);
- b.setBounds(50,100,95,30);
- f.add(b);
- f.setSize(400,400);
What is purpose of JTree Mcq?
The JTree class is used to display the tree structured data or hierarchical data. JTree is a complex component. It has a ‘root node’ at the top most which is a parent for all nodes in the tree. It inherits JComponent class.
What is the purpose of JTree?
Tree-Related Classes and Interfaces
| Class or Interface | Purpose |
|---|---|
| JTree | The component that presents the tree to the user. |
| TreePath | Represents a path to a node. |
How do I add text to a JButton?
By default, we can create a JButton with a text and also can change the text of a JButton by input some text in the text field and click on the button, it will call the actionPerformed() method of ActionListener interface and set an updated text in a button by calling setText(textField.
What is JTextField in Java?
JTextField is a lightweight component that allows the editing of a single line of text. For information on and examples of using text fields, see How to Use Text Fields in The Java Tutorial. JTextField is intended to be source-compatible with java.
What is a JTree in Java?
What is JscrollPane in Java Swing?
A JscrollPane is used to make scrollable view of a component. When screen size is limited, we use a scroll pane to display a large component or a component whose size can change dynamically.
What is JTree in advanced Java?
The JTree class is used to display the tree structured data or hierarchical data. JTree is a complex component. It has a ‘root node’ at the top most which is a parent for all nodes in the tree.
What is JButton in Java and explain it?
JButton. JButton is in implementation of a push button.
How can set the margin to a JButton in Java?
We can set a margin to a JButton by using the setMargin () method of JButton class and pass Insets (int top, int left, int bottom, int right) as an argument.
What is JTable in Java?
JTable Component in Java. The JTable is used to display tables of data and allows the user to edit the data. This is mainly used to view data from the database or So, now let’s start this tutorial! 1. Open JCreator or NetBeans and make a java program with a file name of jTableComponent.java.
What is a JFrame in Java?
JFrame is the core class of javax.swing package and is used to develop GUI (graphical user interface ) in which various visual objects like Text Field,Radio Button,scroll Bar,check Box etc are embedded.