What does repaint () do in Java?

The repaint method is an asynchronous method of applet class. When call to repaint method is made, it performs a request to erase and perform redraw of the component after a small delay in time.

What is paint () and repaint () methods?

The paint() method contains instructions for painting the specific component. The repaint() method, which can’t be overridden, is more specific: it controls the update() to paint() process. You should call this method if you want a component to repaint itself or to change its look (but not the size).

Why is repaint method used in Java applet?

The repaint () method causes the AWT runtime system to execute the update () method of the Component class which clears the window with the background color of the applet and then calls the paint () method.

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What does Jframe repaint do?

Calling repaint() on any Component will add a request to the repaint manager to paint that component. If conditions are correct, the manager will then arrange to have the Component’s paint(…) method called.

What is difference between repaint and update method in Java?

repaint method should be used to invoke any components paint method. The repaint method actually starts a new thread that calls update instead of performing the painting sequentially. 3. update method, by default, calls the paint method after erasing the entire component.

What is the use of paint () method How do we invoke it?

The Paint Method. When AWT invokes this method, the Graphics object parameter is pre-configured with the appropriate state for drawing on this particular component: The Graphics object’s color is set to the component’s foreground property. The Graphics object’s font is set to the component’s font property.

What is the difference between the paint () and repaint () methods Mcq?

Scrollbar and a ScrollPane – A Scrollbar is a Component.

What is the difference between the paint() and repaint() methods?

paint() repaint()
The paint() method is called when some action is performed on the window. Whenever a repaint method is called, the update method is also called along with paint() method.

What is paint in Java?

paint( ) is also called when the applet begins execution. Whatever the cause, whenever the applet must redraw its output, paint( ) is called. The paint( ) method has one parameter of type Graphics. This parameter will contain the graphics context, which describes the graphics environment in which the applet is running.

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What are applets explain?

An applet is a small application designed to run within another application. … Examples of applets designed to run in web browsers include calculators, drawing programs, animations, and video games. Web-based applets can run in any browser on any operating system and long as the Java plug-in is installed.

What is the difference between paint and paintComponent method?

It looks like the paint() method actually draws the component, including the border and children. If you only want to customize the component’s appearance excluding the border and children, you use paintComponent() .

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 JPanel in Java?

The JPanel is a simplest container class. It provides space in which an application can attach any other component. It inherits the JComponents class. It doesn’t have title bar.

What does setContentPane do in Java?

setContentPane. Sets the contentPane property. This method is called by the constructor. Swing’s painting architecture requires an opaque JComponent in the containment hiearchy.

Why can’t you call paint () method directly instead of calling repaint () method?

Why cant we call paint (Graphics g) rather than repaint() ? Short answer: because then it would be called at the wrong time or possibly in the wrong thread (and without an appropriate Graphics). The Graphics object must be prepared and delivered by the JVM itself with help from the platform/operating system.

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How do you call a paint method?

paint(): This method holds instructions to paint this component. In Java Swing, we can change the paintComponent() method instead of paint() method as paint calls paintBorder(), paintComponent() and paintChildren() methods. We cannot call this method directly instead we can call repaint().

When repaint () method is called ____ method is called * Draw () drawString () Update () paint ()?

Arrange the steps involved in developing and testing the applet in correct order. 4. State whether the following statements about the Applets are True or False. i) Applets can communicate with other services on the network.