Java URI copy constructor

README.md

Using the URI copy constructor on an URI where the userinfo part contains a percent-escaped colon (U+003A as %3A) produces a different result.

URITest.java

import org.junit.Assert;
import org.junit.jupiter.api.Test;

import java.net.URI;
import java.net.URISyntaxException;

public class URITest {

    @Test
    void test() throws URISyntaxException {
        URI u = new URI("http://user%3Acolon:[email protected]/");
        URI copy = new URI(u.getScheme(), u.getUserInfo(), u.getHost(), u.getPort(), u.getPath(), u.getQuery(), u.getFragment());
        Assert.assertEquals(u, copy);
        // java.lang.AssertionError: expected:<http://user%3Acolon:[email protected]/> but was:<http://user:colon:[email protected]/>
        // Expected :http://user%3Acolon:[email protected]/
        // Actual   :http://user:colon:[email protected]/
    }
}

OpenJDK bug report: https://bugs.openjdk.java.net/browse/JDK-8252216