Explained AWT code for special programs.
HeadlessException Summary: By the end of this tutorial you will come to know the possibility of raising HeadlessException by JVM. It falls under the category unchecked exception. This runtime exception is thrown when the code that is dependent on the hardware like keyboard, display, or mouse is called in an environment that does not support …
Borderless Frame pack() Summary: By the end of this tutorial "Borderless Frame pack()", you will understand how to create a borderless frame and pack() method. 1. Creating a borderless window Frame is known as top-level window as it contains border and title bar (panel is not a top-level window; it is always a child window …
We know using java.awt.Color class, different colors (nearly 16 million shades) can be created and applied to graphics or components. Using java.util.Random class, various colors can be produced randomly and applied to any component. In the following program, each button click gives different color to the frame. For generating colors randomly, here we use java.util.Random …
Java Placing Frame Icon Summary: Learn in this tutorial "Java Placing Frame Icon", how to place your own icon on the frame (in place of default coffee cup) title bar. In the following program, our own choice of icon (bird) is placed on the frame title bar. It replaces the default coffee cup. The frame …
Why java.awt.event is to be imported separately when already java.awt package is imported? It is a very general doubt uncleared in many minds. To get the clear answer, first you must know how the packages are maintained by Java with the colloboration of OS. A package of Java is treated as a directory by the …
getClickCount() of MouseEvent class returns the number of clicks done on mouse. Following is the method signature as defined in class java.awt.event.MouseEvent public int getClickCount(): Returns the number of mouse clicks associated with this event. Mouse Multiple Clicks getClickCount() program uses getClickCount() to know the number of clicks done on the button. import java.awt.*; import …
By default the frame, you create, is placed on the left top corner of the monitor by JVM. But you can dictate the position. In the following program, the frame is positioned in the center of the monitor. The task here is, you must get the screen (monitor) size and your frame size dynamically throuh …
A similar program is available in frame – Finding x and y Coordinates of Mouse Position. The same frame program is converted to applet. Following is the example. The mouse cursor location in x and y Coordinates and the type of action are displayed on the applet window and also on the applet status bar. …
We have seen earlier a similar program Handling Mouse Events with MouseAdapter Example with an introduction to MouseAdapter, but the window here is frame. Let us do another program with applet window. The following program displays a message "Mouse is clicked" in the applet window and "MouseMotionAdapter is in action" at status bar when mouse …
This code gives strength on AWT graphics programming. There are no predefined methods that can be used straightaway to place the text in the center of the frame and also underline the text. Some programming techniques are required to solve the task. Example on Java Centered Text with Underline The following program places the sting …
We know earlier in "Java Layout Managers" that two styles of placing components in containers – pixel format and position format. Now let us discuss clearly what pixel format is and how to place a component in terms of pixels. We also know earlier, the default layout manager for Frame is BorderLayout and for Panel …
