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diff --git a/src/main/java/org/junit/runner/JUnitCore.java b/src/main/java/org/junit/runner/JUnitCore.java
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+++ b/src/main/java/org/junit/runner/JUnitCore.java
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+package org.junit.runner;
+
+import java.util.ArrayList;
+import java.util.List;
+
+import junit.runner.Version;
+import org.junit.internal.JUnitSystem;
+import org.junit.internal.RealSystem;
+import org.junit.internal.TextListener;
+import org.junit.internal.runners.JUnit38ClassRunner;
+import org.junit.runner.notification.Failure;
+import org.junit.runner.notification.RunListener;
+import org.junit.runner.notification.RunNotifier;
+
+/**
+ * <code>JUnitCore</code> is a facade for running tests. It supports running JUnit 4 tests, 
+ * JUnit 3.8.x tests, and mixtures. To run tests from the command line, run 
+ * <code>java org.junit.runner.JUnitCore TestClass1 TestClass2 ...</code>.
+ * For one-shot test runs, use the static method {@link #runClasses(Class[])}. 
+ * If you want to add special listeners,
+ * create an instance of {@link org.junit.runner.JUnitCore} first and use it to run the tests.
+ * 
+ * @see org.junit.runner.Result
+ * @see org.junit.runner.notification.RunListener
+ * @see org.junit.runner.Request
+ */
+public class JUnitCore {
+	private RunNotifier fNotifier;
+
+	/**
+	 * Create a new <code>JUnitCore</code> to run tests.
+	 */
+	public JUnitCore() {
+		fNotifier= new RunNotifier();
+	}
+
+	/**
+	 * Run the tests contained in the classes named in the <code>args</code>.
+	 * If all tests run successfully, exit with a status of 0. Otherwise exit with a status of 1.
+	 * Write feedback while tests are running and write
+	 * stack traces for all failed tests after the tests all complete.
+	 * @param args names of classes in which to find tests to run
+	 */
+	public static void main(String... args) {
+		runMainAndExit(new RealSystem(), args);
+	}
+
+	/**
+	 * Do not use. Testing purposes only.
+	 * @param system 
+	 */
+	public static void runMainAndExit(JUnitSystem system, String... args) {
+		Result result= new JUnitCore().runMain(system, args);
+		system.exit(result.wasSuccessful() ? 0 : 1);
+	}
+
+	/**
+	 * Run the tests contained in <code>classes</code>. Write feedback while the tests
+	 * are running and write stack traces for all failed tests after all tests complete. This is
+	 * similar to {@link #main(String[])}, but intended to be used programmatically.
+	 * @param computer Helps construct Runners from classes
+	 * @param classes Classes in which to find tests
+	 * @return a {@link Result} describing the details of the test run and the failed tests.
+	 */
+	public static Result runClasses(Computer computer, Class<?>... classes) {
+		return new JUnitCore().run(computer, classes);
+	}
+	/**
+	 * Run the tests contained in <code>classes</code>. Write feedback while the tests
+	 * are running and write stack traces for all failed tests after all tests complete. This is
+	 * similar to {@link #main(String[])}, but intended to be used programmatically.
+	 * @param classes Classes in which to find tests
+	 * @return a {@link Result} describing the details of the test run and the failed tests.
+	 */
+	public static Result runClasses(Class<?>... classes) {
+		return new JUnitCore().run(defaultComputer(), classes);
+	}
+	
+	/**
+	 * Do not use. Testing purposes only.
+	 * @param system 
+	 */
+	public Result runMain(JUnitSystem system, String... args) {
+		system.out().println("JUnit version " + Version.id());
+		List<Class<?>> classes= new ArrayList<Class<?>>();
+		List<Failure> missingClasses= new ArrayList<Failure>();
+		for (String each : args)
+			try {
+				classes.add(Class.forName(each));
+			} catch (ClassNotFoundException e) {
+				system.out().println("Could not find class: " + each);
+				Description description= Description.createSuiteDescription(each);
+				Failure failure= new Failure(description, e);
+				missingClasses.add(failure);
+			}
+		RunListener listener= new TextListener(system);
+		addListener(listener);
+		Result result= run(classes.toArray(new Class[0]));
+		for (Failure each : missingClasses)
+			result.getFailures().add(each);
+		return result;
+	}
+
+	/**
+	 * @return the version number of this release
+	 */
+	public String getVersion() {
+		return Version.id();
+	}
+	
+	/**
+	 * Run all the tests in <code>classes</code>.
+	 * @param classes the classes containing tests
+	 * @return a {@link Result} describing the details of the test run and the failed tests.
+	 */
+	public Result run(Class<?>... classes) {
+		return run(Request.classes(defaultComputer(), classes));
+	}
+
+	/**
+	 * Run all the tests in <code>classes</code>.
+	 * @param computer Helps construct Runners from classes
+	 * @param classes the classes containing tests
+	 * @return a {@link Result} describing the details of the test run and the failed tests.
+	 */
+	public Result run(Computer computer, Class<?>... classes) {
+		return run(Request.classes(computer, classes));
+	}
+
+	/**
+	 * Run all the tests contained in <code>request</code>.
+	 * @param request the request describing tests
+	 * @return a {@link Result} describing the details of the test run and the failed tests.
+	 */
+	public Result run(Request request) {
+		return run(request.getRunner());
+	}
+
+	/**
+	 * Run all the tests contained in JUnit 3.8.x <code>test</code>. Here for backward compatibility.
+	 * @param test the old-style test
+	 * @return a {@link Result} describing the details of the test run and the failed tests.
+	 */
+	public Result run(junit.framework.Test test) { 
+		return run(new JUnit38ClassRunner(test));
+	}
+	
+	/**
+	 * Do not use. Testing purposes only.
+	 */
+	public Result run(Runner runner) {
+		Result result= new Result();
+		RunListener listener= result.createListener();
+		fNotifier.addFirstListener(listener);
+		try {
+			fNotifier.fireTestRunStarted(runner.getDescription());
+			runner.run(fNotifier);
+			fNotifier.fireTestRunFinished(result);
+		} finally {
+			removeListener(listener);
+		}
+		return result;
+	}
+	
+	/**
+	 * Add a listener to be notified as the tests run.
+	 * @param listener the listener to add
+	 * @see org.junit.runner.notification.RunListener
+	 */
+	public void addListener(RunListener listener) {
+		fNotifier.addListener(listener);
+	}
+
+	/**
+	 * Remove a listener.
+	 * @param listener the listener to remove
+	 */
+	public void removeListener(RunListener listener) {
+		fNotifier.removeListener(listener);
+	}
+	
+	static Computer defaultComputer() {
+		return new Computer();
+	}
+
+}