Applications use in Java GUIThe Java GUI consists of a separate, .pdf
- 1. Applications use in Java GUI: The Java GUI consists of a separate, automous task execution thread called the "event loop". Every action that affects the GUI, e.g. calls to repaint the screen or to manipulate the properties of a GUI component, or is a result of something happening to the GUI, e.g. the user clicks the mouse or hits a key, is encapsulated in the form of an "event" that is placed into a queue for the event loop to process. The result of processing an event may be a manipulation of the bits of color on the screen or it may result in calls to methods in the developer's code. 1.A Java GUI application uses the standard Java components GUI component set, Swing, and is deployed to the desktop. 2.The Swing GUI Builder in NetBeans IDE simplifies the GUI development process and enables you to visually create Java GUI applications using pre-installed Swing and AWT components. 3.JavaFX is a rich set of graphics and media packages that enables developers to design, create, test, debug, and deploy rich client applications (RIAs) that behave consistently across multiple platforms. Similariti Between JAVA and JAVA GUI: I think in many cases the overhead incurred to run a JVM is acceptable because of the functionality the code base provides.So winding back a bit, the reason that functionality can exist with Java has much to do with the language/environment which frees programmers from a lot of resource management and allows them to focus more on plugging together components. Time to market and all that jazz.Like a lot of interpreted languages, Java's development cycle ispretty excellent I think. A programmer can get a fairly complicatedapplication off the ground quickly due to a number of things broughtabout both by the interp-language development paradigm that allows for immediate detection of errors and compile-and-test-as-you-code sessions.I think those are the kinds of things which has made Java popular. Some Java applications that you can install and play with on your own desktop machine: 1.Eclipse 2.NetBeans 3.jEdit 4.OpenOffice Java is used in JAVA GUI: The Java GUI system however is a legacy issue where the system underwent a large-scale upgrade , so some of the classes involved are spread over the (relatively) older java.awt packages
- 2. and the newer javax.swing packages. In general, if the class name starts with "J", then it is in the Swing package. Since some functionality appears to be duplicated in the Swing packages, such as frames and buttons, always use the Swing component over the older AWT components when there is a choice. Commonly Used Methods in GUI Components: void setPreferredSize(int width, int height) :sets the size of a component to be used when the layout manager is able to use that size, e.g. there is enough room. Some layout managers always ignore the size setting of a component because the size is under other constraints.. String getText(), void setText(String s) :accessor methods for the text of labels, buttons, text fields and text areas. void setBackground: sets the background color of a component. In JAVA GUI Using Some Utility Classes,Those Are Utility Classes 1.java.awt.Graphics :This abstract class is rarely instantiated by the developer's code. A machine-dependent instance of this class is handed to the paintComponent method of a visible GUI component during the screen painting process, it is NOT instantiated by the developer's code but rather by the Java GUI sub-system. The developer can writed code that will use that supplied Graphics object instance to draw lines, shapes and images onto the screen. For advanced graphics work, it should be noted that the supplied Graphics object can always be safely downcast to the more capable java.awt.Graphcs2D class. 2.java.awt.Color :Represents a color. Has static fields predefined to common colors plus can be expressed in a number of different formats, such as 3-bit RGB values. 3.java.awt.Point :Represents an point on 2-dimensional plane as specified by integer-valued Cartesian coordinates.. Has fields to retrieve the x and y coordinates plus methods for operations such as calculating the distance between two points. For floating point-valued Cartesian coordinates, use the java.awt.geom.Point2D class. Solution Applications use in Java GUI: The Java GUI consists of a separate, automous task execution thread called the "event loop". Every action that affects the GUI, e.g. calls to repaint the screen or to manipulate the properties of a GUI component, or is a result of something happening to the GUI, e.g. the user clicks the mouse or hits a key, is encapsulated in the form of an "event" that is placed into a queue for the event loop to process. The result of processing an event may be a manipulation of the bits of color on the screen or it may result in calls to methods in the developer's code.
- 3. 1.A Java GUI application uses the standard Java components GUI component set, Swing, and is deployed to the desktop. 2.The Swing GUI Builder in NetBeans IDE simplifies the GUI development process and enables you to visually create Java GUI applications using pre-installed Swing and AWT components. 3.JavaFX is a rich set of graphics and media packages that enables developers to design, create, test, debug, and deploy rich client applications (RIAs) that behave consistently across multiple platforms. Similariti Between JAVA and JAVA GUI: I think in many cases the overhead incurred to run a JVM is acceptable because of the functionality the code base provides.So winding back a bit, the reason that functionality can exist with Java has much to do with the language/environment which frees programmers from a lot of resource management and allows them to focus more on plugging together components. Time to market and all that jazz.Like a lot of interpreted languages, Java's development cycle ispretty excellent I think. A programmer can get a fairly complicatedapplication off the ground quickly due to a number of things broughtabout both by the interp-language development paradigm that allows for immediate detection of errors and compile-and-test-as-you-code sessions.I think those are the kinds of things which has made Java popular. Some Java applications that you can install and play with on your own desktop machine: 1.Eclipse 2.NetBeans 3.jEdit 4.OpenOffice Java is used in JAVA GUI: The Java GUI system however is a legacy issue where the system underwent a large-scale upgrade , so some of the classes involved are spread over the (relatively) older java.awt packages and the newer javax.swing packages. In general, if the class name starts with "J", then it is in the Swing package. Since some functionality appears to be duplicated in the Swing packages, such as frames and buttons, always use the Swing component over the older AWT components when there is a choice. Commonly Used Methods in GUI Components: void setPreferredSize(int width, int height) :sets the size of a component to be used when the layout manager is able to use that size, e.g. there is enough room. Some layout managers always ignore the size setting of a component because the size is under other constraints..
- 4. String getText(), void setText(String s) :accessor methods for the text of labels, buttons, text fields and text areas. void setBackground: sets the background color of a component. In JAVA GUI Using Some Utility Classes,Those Are Utility Classes 1.java.awt.Graphics :This abstract class is rarely instantiated by the developer's code. A machine-dependent instance of this class is handed to the paintComponent method of a visible GUI component during the screen painting process, it is NOT instantiated by the developer's code but rather by the Java GUI sub-system. The developer can writed code that will use that supplied Graphics object instance to draw lines, shapes and images onto the screen. For advanced graphics work, it should be noted that the supplied Graphics object can always be safely downcast to the more capable java.awt.Graphcs2D class. 2.java.awt.Color :Represents a color. Has static fields predefined to common colors plus can be expressed in a number of different formats, such as 3-bit RGB values. 3.java.awt.Point :Represents an point on 2-dimensional plane as specified by integer-valued Cartesian coordinates.. Has fields to retrieve the x and y coordinates plus methods for operations such as calculating the distance between two points. For floating point-valued Cartesian coordinates, use the java.awt.geom.Point2D class.