A DESCRIPTION OF THE PROBLEM :
Version(in java.lang.module), using the String in it to calc hashcode(). And equals using compareTo() == 0, which impls by anthor way.


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import java.lang.module.ModuleDescriptor.Version;
import org.testng.annotations.Test;
import org.testng.annotations.DataProvider;
import static org.testng.Assert.*;

@Test
public class VersionTest {

    // equal version strings
    @DataProvider(name = "equalVersions")
    public Object[][] equalVersions() {
        return new Object[][]{

            { "1", "1.0.0" },
            { "1.0", "1.0.0" },
            { "1.0-beta", "1.0.0-beta" },
            { "01", "1" }, // Leading zeros in version number
            { "1.0.1.0", "1.0.1" }, // Trailing zero in version number
            { "1.0-alpha.0", "1.0-alpha" }, // Trailing zero in pre-release

        };
    }

    /**
     * Test compareTo with equal versions.
     */
    @Test(dataProvider = "equalVersions")
    public void testCompareEqualsVersions(String vs1, String vs2) {

        Version v1 = Version.parse(vs1);
        assertTrue(v1.compareTo(v1) == 0);

        Version v2 = Version.parse(vs2);
        assertTrue(v2.compareTo(v2) == 0);

        v1.equals(v2);
        assertTrue(v1.compareTo(v2) == 0);
        assertTrue(v2.compareTo(v1) == 0);
        assertEquals(v1, v2);
        assertEquals(v2, v1);

        assertEquals(v1.hashCode(), v2.hashCode(), "Hash codes must match for equal versions");
    }

}
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