Option in java

code.java

package notyy;

public class Option<A> {
    private final A thing;

    public Option(A thing) {
        this.thing =  thing;
    }

    public <E extends Exception> A getOrThrow(E excetion) throws E{
        if(thing == null){
            throw excetion;
        }
        return thing;
    }

    public <B extends A> A getOrElse(B another) {
        return thing == null ? another : thing;
    }
}

test.java

package notyy;

import static org.hamcrest.core.Is.is;
import static org.junit.Assert.assertThat;
import static org.junit.Assert.fail;

public class OptionTest {
    @org.junit.Test
    public void testGetOrThrow() throws Exception {
        String rs = new Option<String>("abc").getOrThrow(new IllegalArgumentException("exception"));
        assertThat(rs,is("abc"));

        try{
            new Option<String>(null).getOrThrow(new IllegalArgumentException("exception"));
            fail("should throw exception");
        } catch (IllegalArgumentException ex){
            assertThat(ex.getMessage(),is("exception"));
        }
    }

    @org.junit.Test
    public void testGetOrElse() throws Exception {
        String rs = new Option<String>("abc").getOrElse("xyz");
        assertThat(rs, is("abc"));

        assertThat(new Option<String>(null).getOrElse("xyz"),is("xyz"));
    }
}