After completing this chapter, you will be able to draw strings, images, and shapes via the Graphics class in your Java programs. We discuss geometry-related classes—Polygon, Rectangle, Point, and Dimension, an
The meaning of the opaque property is often misunderstood. Sometimes it is taken to mean, "Make the component's background transparent." However, this is not Swing's strict interpretation of opacity. Some components, such as a pushbutton, may set the opaque property to false in order to gi...
This should almost never return java.awt.Component.getName(), as that generally isn't a localized name, and doesn't have meaning for the user. If the object is fundamentally a text object (e.g. a menu item), the accessible name should be the text of the object (e.g. "save"). ...
In Java 1.1, the default value for visible is 10, and the default for maximum is 100; the other values default to 0. If orientation is not HORIZONTAL or VERTICAL, the constructor throws the run-time exception IllegalArgumentException. This constructor is helpful if you want to reserve space...
You can set the value of gridx or gridy to an integer to bypass the default sequential placement. Note that GridBagConstraints.NONE and GridBagConstraints.REMAINDER have no meaning in this context. If you add the following gridx and gridy settings to the code for the OK and Cancel buttons...
Resolution is in pixels per inch, like 72 or 240, and it ONLY has meaning when displaying things to a physical scale such as printing on paper. The resolution can be anything and still display properly with most software because almost all software goes by the image dimensions in pixels, ...
Java AWT Toolkit Example: beep() Java AWT Toolkit Example: Change TitleBar Icon Java ActionListener Interface The Java ActionListener is notified whenever you click on the button or menu item. It is notified against ActionEvent. The ActionListener interface is found in java.awt.event package. It...
import java.awt.*; import javax.swing.*; // // Set up a place to for all methods to call for logging results either to // the field in the main dialog or to a file. public final class LogHandler { // // Only one location for the log messages to go. // private static JTe...
这些代码示例主要来源于Github/Stackoverflow/Maven等平台,是从一些精选项目中提取出来的代码,具有较强的参考意义,能在一定程度帮忙到你。IndexColorModel.getGreen()方法的具体详情如下:包路径:java.awt.image.IndexColorModel类名称:IndexColorModel方法名:getGreen...
so that means no dynamic class loading; File, FileInputStream, and FileOutputStream are missing, meaning no standard file i/o. Most significantly, java.awt and javax.swing are missing. This means that whatever user interface is built must be built from scratch with JavaScript only in mind. ...