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* FITNESS FOR A PARTICULAR PURPOSE . See the GNU General Public License
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*
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/* @test
* @ bug 8139885
* @ run testng / othervm - ea - esa test . java . lang . invoke . FindAccessTest
*/
package test.java.lang.invoke;
import java.lang.invoke.MethodHandle;
import java.lang.invoke.MethodHandles;
import java.lang.invoke.MethodHandles.Lookup;
import java.lang.invoke.MethodType;
import static org.testng.AssertJUnit.*;
import org.testng.annotations.*;
/**
* Tests for Lookup . findClass / accessClass extensions added in JEP 274 .
*/
public class FindAccessTest {
static final Lookup LOOKUP = MethodHandles.lookup();
@Test
public static void testFindSpecial() throws Throwable {
FindSpecial.C c = new FindSpecial.C();
assertEquals("I1.m" , c.m());
MethodType t = MethodType.methodType(String.class );
MethodHandle ci1m = LOOKUP.findSpecial(FindSpecial.I1.class , "m" , t, FindSpecial.C.class );
assertEquals("I1.m" , (String) ci1m.invoke(c));
}
@Test
public static void testFindSpecialAbstract() throws Throwable {
FindSpecial.C c = new FindSpecial.C();
assertEquals("q" , c.q());
MethodType t = MethodType.methodType(String.class );
boolean caught = false ;
try {
MethodHandle ci3q = LOOKUP.findSpecial(FindSpecial.I3.class , "q" , t, FindSpecial.C.class );
} catch (Throwable thrown) {
if (!(thrown instanceof IllegalAccessException) || !FindSpecial.ABSTRACT_ERROR.equals(thrown.getMessage())) {
throw new AssertionError(thrown.getMessage(), thrown);
}
caught = true ;
}
assertTrue(caught);
}
@Test(expectedExceptions = {ClassNotFoundException.class })
public static void testFindClassCNFE() throws ClassNotFoundException, IllegalAccessException {
LOOKUP.findClass("does.not.Exist" );
}
static class FindSpecial {
interface I1 {
default String m() {
return "I1.m" ;
}
}
interface I2 {
default String m() {
return "I2.m" ;
}
}
interface I3 {
String q();
}
static class C implements I1, I2, I3 {
public String m() {
return I1.super .m();
}
public String q() {
return "q" ;
}
}
static final String ABSTRACT_ERROR = "no such method: test.java.lang.invoke.FindAccessTest$FindSpecial$I3.q()String/invokeSpecial" ;
}
}
Messung V0.5 in Prozent C=96 H=93 G=94
¤ Dauer der Verarbeitung: 0.1 Sekunden
(vorverarbeitet am 2026-10-11)
¤
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