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| <title>Running a Java program</title> |
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| <h2>Running a Java program</h2> |
| <p> The JDT Debug component includes facilities for launching a Java program using the |
| VM install that is currently configured by the user for a Java project. </p> |
| <h3> Launching a compiled Java program</h3> |
| <p> Java programs that have been compiled in a Java project can be run by |
| getting the appropriate <a href="../reference/api/org/eclipse/jdt/launching/IVMRunner.html"><b> |
| IVMRunner</b></a> |
| for the Java project and running the class by name. The following code |
| snippet shows how the class <b>MyClass</b> inside <b>myJavaProject</b> can |
| be launched.</p> |
| <font color="#4444cc"> |
| <pre> IVMInstall vmInstall = JavaRuntime.getVMInstall(myJavaProject); |
| if (vmInstall == null) |
| vmInstall = JavaRuntime.getDefaultVMInstall(); |
| if (vmInstall != null) { |
| IVMRunner vmRunner = vmInstall.getVMRunner(ILaunchManager.RUN_MODE); |
| if (vmRunner != null) { |
| String[] classPath = null; |
| try { |
| classPath = JavaRuntime.computeDefaultRuntimeClassPath(myJavaProject); |
| } catch (CoreException e) { } |
| if (classPath != null) { |
| VMRunnerConfiguration vmConfig = |
| new VMRunnerConfiguration("MyClass", classPath); |
| ILaunch launch = new Launch(null, ILaunchManager.RUN_MODE, null); |
| vmRunner.run(vmConfig, launch, null); |
| } |
| } |
| } |
| </pre> |
| </font> |
| <p> Another way to launch a Java program is to create a <b>Java application</b> |
| launch configuration, and launch it. The following snippet shows how the |
| class <b>MyClass</b> inside <b> myJavaProject</b> can be launched using a |
| simple launch configuration. By default, the resulting running application |
| uses the JRE and classpath associated with <b>myJavaProject</b>. </p> |
| <font color="#4444cc"> |
| <pre> ILaunchManager manager = DebugPlugin.getDefault().getLaunchManager(); |
| ILaunchConfigurationType type = manager.getLaunchConfigurationType(IJavaLaunchConfigurationConstants.ID_JAVA_APPLICATION); |
| ILaunchConfigurationWorkingCopy wc = type.newInstance(null, "SampleConfig"); |
| wc.setAttribute(IJavaLaunchConfigurationConstants.ATTR_PROJECT_NAME, "myJavaProject"); |
| wc.setAttribute(IJavaLaunchConfigurationConstants.ATTR_MAIN_TYPE_NAME, "myClass"); |
| ILaunchConfiguration config = wc.doSave(); |
| config.launch(ILaunchManager.RUN_MODE, null); |
| </pre> |
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