### Question:
Version implements Comparable<Version> { public boolean equals(Object o) { return (o instanceof Version) && canonical.equals(((Version) o).canonical); } Version(String version); boolean satisfies(String expr); int compareTo(Version o); String toString(); boolean equals(Object o); int hashCode(); boolean greaterThan(Version other); boolean greaterThanOrEqualTo(Version other); boolean lessThan(Version other); boolean lessThanOrEqualTo(Version other);  }### Answer:
@Test public void testCompareVersionEquals2() throws Exception { { Version version1 = new Version("27.0.0"); Version version2 = new Version("27.0.0"); Assert.assertTrue(version1.equals(version2)); } { Version version1 = new Version("27.0"); Version version2 = new Version("27.0.0"); Assert.assertTrue(version1.equals(version2)); } { Version version1 = new Version("27"); Version version2 = new Version("27.0.0"); Assert.assertTrue(version1.equals(version2)); } { Version version1 = new Version("27"); Version version2 = new Version("27.0"); Assert.assertTrue(version1.equals(version2)); } { Version version1 = new Version("27.0"); Version version2 = new Version("27.0.0"); Assert.assertTrue(version1.equals(version2)); } }