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Articles by Alshifa Hasnain
Page 6 of 23
How to set the shortcut key to a JCheckBox in Java?
In this article, we will learn to set the shortcut key to a JCheckBox in Java. To create a JCheckBox with a keyboard shortcut (Alt + C), we will use Java Swing. When we either click the checkbox with the mouse or press Alt+C, the checkbox toggles, and a message dialog is displayed. We can do this by using the setMnemonic('C') method to assign the shortcut key and an ActionListener to respond to the checkbox selection. What is a JCheckBox? A JCheckBox is a subclass of JToggleButton, and it can be a small box that is either checked or unchecked. When ...
Read MoreHow can we limit the number of characters inside a JTextField in Java?
In this article, we will learn how to limit the number of characters inside a JTextField in Java. Whether you're creating a form for phone numbers, zip codes, or usernames, controlling the maximum number of characters is important for data validation. JTextField A JTextField is one of the most important Swing components that allows the user to an input text value in a single line format. We can restrict the number of characters that the user can enter into a JTextField can be achieved by using the PlainDocument class. PlainDocument Class PlainDocument is a subclass that extends the AbstractDocument, a ...
Read MoreHow to read an input value from a JTextField and add to a JList in Java?
In this article, we will learn to read an input value from a JTextField and add it to a JList in Java. The Swing's two commonly used components are JTextField for text input and JList for displaying a list of items for building graphical user interfaces. JList A JList is a subclass of the JComponent class that allows the user to choose either a single selection or multiple selections. The JList class itself does not support a scrollbar. In order to add a scrollbar, we have to use the JScrollPane class together with the JList class. The JScrollPane then manages ...
Read MoreHow can we hide left/right pane of a JSplitPane programmatically in Java?
In this article, we will learn how to hide the left/right pane of a JSplitPane programmatically in Java. JSplitPane is a simple Swing component in GUI programming that allows hiding one side of the split pane, resulting in a collapsible panel look. JSplitPane A JSplitPane is a subclass of the JComponent class that allows us to arrange two components side by side horizontally or vertically in a single pane. The display areas of both components can also be adjusted at runtime by the user. The important methods of JSplitPane are remove(), removeAll(), resetToPreferredSizes(), and setDividerLocation(). A JSplitPane can generate a ...
Read MoreWhat Are Whitespace and Line Breaks in JavaScript?
JavaScript like other programming languages, permits whitespace and line breaks to make the code more readable. Although JavaScript tends to ignore whitespace, line breaks at times influence the way in which the code is presented. What is Whitespace in JavaScript? Whitespace in JavaScript comprises newlines, tabs, and spaces. JavaScript's engine disregards excess whitespace, i.e., inserting spaces between variables, operators, or keywords doesn't influence the code's execution. Example For example, the following two code snippets are functionally identical − var employee = "Amit"; var employee="Amit"; Even though the first example has spaces around the assignment operator (=), JavaScript treats both lines the ...
Read MoreHow to add a new list element under a \\\'ul\\\' using jQuery?
In this article, we will learn to add a new list element under a "" using jQuery. jQuery is a popular JavaScript library that simplifies HTML manipulation, event handling, and animations. One of its practical applications is dynamically adding elements to a webpage without requiring a full page reload. Why Use jQuery? DOM (Document Object Model) updating using basic JavaScript might become difficult and needs more than one line of code. jQuery has simplified it through easy selectors and functions. Employing jQuery helps us − Select elements efficiently. Handle events seamlessly. ...
Read MoreDifference Between Static and Final in Java
In this article, we will learn about the difference between static and final keywords in Java. Two of the most frequently used and frequently confused keywords are static and final. Although they may at times be used together in code, they have basically different functions. Static The static keyword can be applied to nested static classes, variables, methods, and blocks. It is not required to initialize the static variable when it is declared. This variable can be re-initialized. It can access the static members of the class only, and it can be called only by other static methods. Objects of ...
Read MoreHow can we detect an event when the mouse moves over any component in Java?
In this article, we will learn to detect an event when the mouse moves over any component in Java. While building applications with Swing, detecting when the mouse enters or exits a component enables you to create responsive UIs with visual feedback. MouseListener We can implement a MouseListener interface when the mouse is stable while handling the mouse event. A MouseEvent is fired when we can press, release, or click (press followed by release) a mouse button (left or right button) at the source object or position the mouse pointer at (enter) and away (exit) from the source object. ...
Read MoreHow can we set the foreground and background color to JComboBox items in Java?
In this article, we will learn set the foreground and background color to JComboBox items in Java. Setting basic foreground and background colors for the combo box helps to create interactive Swing-based applications. JComboBox A JComboBox is a subclass of the JComponent class, and it is a combination of a text field and a drop-down list from which the user can choose a value. A JComboBox can generate the ActionListener, ChangeListener, and ItemListener interfaces when the user actions with a combo box. setForeground() Method The setForeground() method can be used to set the foreground color of JComboBox items in ...
Read MoreHow can we disable the cell editing inside a JTable in Java?
When working with JTables in Java Swing, there are many cases where one might need to display data that shouldn't be modified by users. In this article, we will learn to disable the cell editing inside a JTable in Java. JTable A JTable is a subclass of JComponent for displaying complex data structures. A JTable can follow the Model View Controller (MVC) design pattern to display the data in rows and columns. A JTable can fire TableModelListener, TableColumnModelListener, ListSelectionListener, CellEditorListener, and RowSorterListener interfaces. editCellAt() Method The editCellAt() method is used to prevent the JTable from editing a particular ...
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