import org.eclipse.jdt.internal.debug.ui.launcher.MainMethodSearchEngine; //导入依赖的package包/类
public IType[] getMainTypes(IProgressMonitor monitor) {
	IJavaProject javaProject = getJavaProject();

	if (javaProject != null) {
		// Returns main method types
		boolean includeSubtypes = true;
		MainMethodSearchEngine engine = new MainMethodSearchEngine();
		int constraints = IJavaSearchScope.SOURCES;
		constraints |= IJavaSearchScope.APPLICATION_LIBRARIES;
		IJavaSearchScope scope = SearchEngine.createJavaSearchScope(
				new IJavaElement[] { javaProject }, constraints);
		return engine.searchMainMethods(monitor, scope, includeSubtypes);
	}
	return new IType[] {};

}
 

import org.eclipse.jdt.internal.debug.ui.launcher.MainMethodSearchEngine; //导入依赖的package包/类
public static Collection<String> findMainClasses(IJavaProject p, IProgressMonitor monitor) {
	MainMethodSearchEngine engine = new MainMethodSearchEngine();
	int constraints = IJavaSearchScope.SOURCES;
	IJavaSearchScope scope = SearchEngine.createJavaSearchScope(new IJavaElement[]{p}, constraints);
	IType[] types = engine.searchMainMethods(monitor, scope, false);
	List<String> mains = Stream.of(types)
			.filter(t -> hasContainerImport(t))
			.map(IType::getFullyQualifiedName)
			.collect(Collectors.toList());
	
	mains.add(IWildFlySwarmConstants.DEFAULT_MAIN_CLASS);
	return mains;
}