blob: d1f6fa17cbffceb3e6f014242afacc9fbe937580 [file] [log] [blame]
// Copyright (c) 2019, the R8 project authors. Please see the AUTHORS file
// for details. All rights reserved. Use of this source code is governed by a
// BSD-style license that can be found in the LICENSE file.
package backport;
import java.util.Optional;
public final class OptionalBackportJava11Main {
public static void main(String[] args) {
testIsEmpty();
}
private static void testIsEmpty() {
Optional<String> present = Optional.of("hey");
assertFalse(present.isEmpty());
Optional<String> absent = Optional.empty();
assertTrue(absent.isEmpty());
}
private static void assertTrue(boolean value) {
if (!value) {
throw new AssertionError("Expected <true> but was <false>");
}
}
private static void assertFalse(boolean value) {
if (value) {
throw new AssertionError("Expected <false> but was <true>");
}
}
}