What is the use of setVisible in Java?
The setVisible(true) method makes the frame appear on the screen. If you forget to do this, the frame object will exist as an object in memory, but no picture will appear on the screen.
What is setLayout in Java?
The setLayout(...) method allows you to set the layout of the container, often a JPanel, to say FlowLayout, BorderLayout, GridLayout, null layout, or whatever layout desired. The layout manager helps lay out the components held by this container.
What is Java Swing package?
Java Swing is a lightweight Java graphical user interface (GUI) widget toolkit that includes a rich set of widgets. It is part of the Java Foundation Classes (JFC) and includes several packages for developing rich desktop applications in Java.
What is JScrollPane in Java Swing?
A JScrollPane provides a scrollable view of a component. When screen real estate is limited, use a scroll pane to display a component that is large or one whose size can change dynamically. Other containers used to save screen space include split panes and tabbed panes.
What is setDefaultCloseOperation in Java?
The default behavior is to simply hide the JFrame when the user closes the window. To change the default behavior, you invoke the method setDefaultCloseOperation(int) . To make the JFrame behave the same as a Frame instance, use setDefaultCloseOperation(WindowConstants. DO_NOTHING_ON_CLOSE) .
What is the use of GridLayout in Java?
The GridLayout class in Java is used to design layouts that have a specified number of rows and columns in a rectangular grid. Each component is placed in the equal-sized rectangle. The changes are visible for each small-rectangle whenever its size is adjusted.
Which is better awt or Swing?
AWT stands for Abstract Window Toolkit. It is a platform-dependent API to develop GUI (Graphical User Interface) or window-based applications in Java....Difference between AWT and Swing in Java.S.NOAWTSwing3.Java AWT has comparatively less functionality as compared to Swing.Java Swing has more functionality as compared to AWT.6 more rows•Jan 10, 2022
What is difference between awt and Swing?
AWT and Swing are the two toolkits for building interactive Graphical User Interfaces (GUI). The key difference between AWT and Swing in Java is that AWT is Java's conventional platform-dependent, graphics and user interface widget toolkit whereas Swing is a GUI widget toolkit for Java which is an extension of AWT.
Is Swing a framework?
Swing is a component-based framework, whose components are all ultimately derived from the JComponent class.
What is the difference between JScrollPane and JScrollBar?
What are the differences between a JScrollBar and a JScrollPane in Java? A JScrollBar is a component and it doesn't handle its own events whereas a JScrollPane is a Container and it handles its own events and performs its own scrolling.
What is the difference scrollbar and ScrollPane?
A Scrollbar is a Component, but not a Container. A ScrollPane is a Container. A ScrollPane handles its own events and performs its own scrolling.
What is JTextArea in Java?
A JTextArea is a multi-line area that displays plain text. It is intended to be a lightweight component that provides source compatibility with the java. awt. TextArea class where it can reasonably do so.
What is setLayout null in Java?
setLayout(null); By default, the JPanel has a FlowLayout manager. The layout manager is used to place widgets onto the containers. If we call setLayout(null) we can position our components absolutely. For this, we use the setBounds() method.
What is GridBagLayout in Java?
GridBagLayout is one of the most flexible — and complex — layout managers the Java platform provides. A GridBagLayout places components in a grid of rows and columns, allowing specified components to span multiple rows or columns. Not all rows necessarily have the same height.
Which class defines setSize method?
Vector classsetSize() is a method of Vector class that is used to set the new size of the vector.
What is default layout manager for panels and applets?
flow layoutThe flow layout is the default layout manager for all Panel objects and applets. It places the panel components in rows according to the width of the panel and the number and size of the components.