<shortcut
			label="JUnitTestShortcut"
			icon="icons/elcl16/run.gif"
			class="org.eclipse.jdt.junit.launcher.JUnitLaunchShortcut"
			modes="run, debug"
			id="com.ui.junitShortcut">
			<contextualLaunch>
				<enablement>
					<with variable="selection">
						<test property="com.plugin.ui.launchable" args="org.eclipse.jdt.junit.junitShortcut" />
					</with>
				</enablement>
			</contextualLaunch>
		</shortcut>

IProject project = ResourcesPlugin.getWorkspace().getRoot().getProject("LittleProject");
JUnitLaunchConfigurationDelegate delegate = new JUnitLaunchConfigurationDelegate();
ILaunchConfiguration configuration = null;

try {
    configuration = DebugPlugin.getDefault().getLaunchManager().getLaunchConfigurations()[3]; // Should work on this

    ILaunch launch = configuration.launch(ILaunchManager.RUN_MODE, null);
    delegate.launch(configuration, ILaunchManager.RUN_MODE, launch, null);
}
catch (Exception e) {
    e.printStackTrace();
}

configuration = DebugPlugin.getDefault().getLaunchManager().getLaunchConfigurations()[3];

configuration = getJavaApplicationType().newInstance(project, "Launch");
...
private ILaunchConfigurationType getJavaApplicationType() {
    return DebugPlugin
        .getDefault()
        .getLaunchManager()
        .getLaunchConfigurationType("org.eclipse.jdt.junit.launchconfig");
	}

Object[] segments = new Object[2];
segments[0] = // JUnit Test Class 1
segments[1] = // JUnit Test Class 2

TreePath treepath = new TreePath(segments);
TreeSelection treeselection = new TreeSelection(treepath);

JUnitLaunchShortcut j = new JUnitLaunchShortcut();
j.launch(treeselection, ILaunchManager.RUN_MODE);