Running SnowStorm on the Mobile Emulator in Java

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Running SnowStorm on the Mobile Emulator
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Many millions of cell phones in use today have an embedded JVMThe Java platform on a cell phone is a slimmed-down version of Java SE that does not include Swing,AWT, Java2D, and many of the other APIs that desktop developers have become used to Shortage of memory space means that even those packages and classes that are included are not necessarily complete Programming a Java application for a cell phone or writing a MIDlet, as they are called is very different to writing a Swing application for the desktop However, provided you are careful, it is possible to write a JavaFX application that will run without changes both on the desktop and in a cell phoneThe JavaFX SDK includes an emulator that lets you compile your application and then run it as if it were executing on a mobile device8 Using the Mobile Emulator from NetBeans You probably won t be surprised to discover that you can run SnowStorm in the mobile emulator simply by changing a single setting in your NetBeans Run configuration
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The mobile emulator is not a perfect simulation of any real handset, but it is a useful tool that can shorten the development cycle In practice, it is advisable to test your application on a representative set of real devices before releasing it to customers
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SnowStorm on the Web, a Phone, and TV
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Ensure that SnowStorm is the main project in the Projects view, and then select Customize in the drop-down in the Run toolbarWhen the Project Properties dialog opens, select Run under Categories and change the Application Execution Model to Run in Mobile Emulator Click OK to close the dialog, and then click the Run button on the Run toolbar NetBeans will compile the application for the mobile platform, open the mobile emulator, which is a separate program, and start the SnowStorm application in the simulated mobile deviceYou can see how this typically looks in Figure 4-15
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Figure 4-15
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Running SnowStorm in the mobile emulator
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Using the Mobile Emulator from Eclipse To run SnowStorm in the mobile emulator from Eclipse, select the SnowStorm project in the Package Explorer view and select Run, Run ConfigurationsWhen the Run Configurations dialog opens, select the configuration for SnowStorm On the General tab, change the Profile Target to Mobile Profile Run in Emulator, and then click RunThe mobile emulator will start, and the SnowStorm application will be run as a MIDlet
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Running SnowStorm on the JavaFX TV Emulator
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To run the SnowStorm example on the JavaFX TV emulator, simply select the TV emulator in the Project properties page in the NetBeans IDE or the Run configuration in Eclipse and run the application in the normal way
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Debugging the SnowStorm Application
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Both NetBeans and Eclipse provide comprehensive debugging support for Java applications, and the same features can be used to debug JavaFX code In this section, we briefly look at how to use NetBeans to place breakpoints in JavaFX code, step through the code, and inspect and change the values of variables It is a simple matter to adapt the instructions in this section so that they work with EclipseYou ll find more information about how to debug Java and JavaFX applications in the help documentation for both IDEs
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Setting Breakpoints
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To set a breakpoint in JavaFX code, all you have to do is locate the line of code at which you want execution to be suspended and then either click in the left margin of the editor or place the cursor on the line and click Ctrl-F8To suspend the execution of the SnowStorm application whenever it is time to move the snowflakes down the screen, locate the moveSnow() function and set a breakpoint on the first executable line of code after the for statement, as shown in Figure 4-16As you can see, a square appears in the editor margin on the left, and the line is highlighted
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Figure 4-16
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