results.txt

================java.net.URI================
passed	java.net.URI	/home
passed	java.net.URI	../home
passed	java.net.URI	home
passed	java.net.URI	file:///home
passed	java.net.URI	file://../home
passed	java.net.URI	file://home
FAILED	java.net.URI	c:\	Illegal character in opaque part at index 2: c:\
passed	java.net.URI	c:/
passed	java.net.URI	file://c:/
FAILED	java.net.URI	file://c:\	Illegal character in authority at index 7: file://c:\

================java.net.URL================
FAILED	java.net.URL	/home	no protocol: /home
FAILED	java.net.URL	../home	no protocol: ../home
FAILED	java.net.URL	home	no protocol: home
passed	java.net.URL	file:///home
passed	java.net.URL	file://../home
passed	java.net.URL	file://home
FAILED	java.net.URL	c:\	unknown protocol: c
FAILED	java.net.URL	c:/	unknown protocol: c
passed	java.net.URL	file://c:/
FAILED	java.net.URL	file://c:\	For input string: "\"

URITest.java

import java.lang.reflect.Constructor;
import java.lang.reflect.InvocationTargetException;
import java.net.URI;
import java.net.URL;

public class URITest {

	public void run() throws Exception {
		String[] paths = new String[] { "/home", "../home", "home",
				"file:///home", "file://../home", "file://home", "c:\\", "c:/",
				"file://c:/", "file://c:\\" };
		constuct(URI.class, paths);
		constuct(URL.class, paths);
	}

	private <T> void constuct(Class<T> clazz, String[] paths) throws Exception {
		System.out.println(String.format("================%s================",
				clazz.getCanonicalName()));
		for (String path : paths) {
			System.out.println(constuct(clazz, path));
		}
		System.out.println("");
	}

	private <T> String constuct(Class<T> clazz, String path) throws Exception {
		Constructor<T> constructor = clazz.getConstructor(String.class);

		try {
			constructor.newInstance(path);
			return status("passed", clazz, path);
		} catch (InvocationTargetException e) {
			Class<?> throwsType = constructor.getExceptionTypes()[0];
			Throwable t = e.getTargetException();
			if (t.getClass() == throwsType) {
				return status("FAILED", clazz, path, t.getMessage());
			} else {
				throw e;
			}
		}
	}

	private <T> String status(String result, Class<T> clazz, String path) {
		return status(result, clazz, path, null);
	}

	private <T> String status(String result, Class<T> clazz, String path,
			String message) {
		StringBuffer buf = new StringBuffer();
		buf.append(result);
		buf.append("\t");
		buf.append(clazz.getCanonicalName());
		buf.append("\t");
		buf.append(path);
		if (message != null) {
			buf.append("\t");
			buf.append(message);
		}
		return buf.toString();
	}

	public static void main(String[] args) throws Exception {
		(new URITest()).run();
	}

}