Backport Java 9 Byte/Short compareUnsigned methods
Change-Id: Iffc29a824b37a5710cce370e43580a5091a4447c
diff --git a/src/test/examplesJava9/backport/ByteBackportJava9Main.java b/src/test/examplesJava9/backport/ByteBackportJava9Main.java
new file mode 100644
index 0000000..2487a81
--- /dev/null
+++ b/src/test/examplesJava9/backport/ByteBackportJava9Main.java
@@ -0,0 +1,38 @@
+package backport;
+
+public final class ByteBackportJava9Main {
+ private static final byte MIN_UNSIGNED_VALUE = (byte) 0;
+ private static final byte MAX_UNSIGNED_VALUE = (byte) -1;
+
+ public static void main(String[] args) {
+ testCompareUnsigned();
+ }
+
+ private static void testCompareUnsigned() {
+ assertTrue(Byte.compareUnsigned(MIN_UNSIGNED_VALUE, MIN_UNSIGNED_VALUE) == 0);
+ assertTrue(Byte.compareUnsigned(MIN_UNSIGNED_VALUE, Byte.MAX_VALUE) < 0);
+ assertTrue(Byte.compareUnsigned(MIN_UNSIGNED_VALUE, Byte.MIN_VALUE) < 0);
+ assertTrue(Byte.compareUnsigned(MIN_UNSIGNED_VALUE, MAX_UNSIGNED_VALUE) < 0);
+
+ assertTrue(Byte.compareUnsigned(Byte.MAX_VALUE, MIN_UNSIGNED_VALUE) > 0);
+ assertTrue(Byte.compareUnsigned(Byte.MAX_VALUE, Byte.MAX_VALUE) == 0);
+ assertTrue(Byte.compareUnsigned(Byte.MAX_VALUE, Byte.MIN_VALUE) < 0);
+ assertTrue(Byte.compareUnsigned(Byte.MAX_VALUE, MAX_UNSIGNED_VALUE) < 0);
+
+ assertTrue(Byte.compareUnsigned(Byte.MIN_VALUE, MIN_UNSIGNED_VALUE) > 0);
+ assertTrue(Byte.compareUnsigned(Byte.MIN_VALUE, Byte.MAX_VALUE) > 0);
+ assertTrue(Byte.compareUnsigned(Byte.MIN_VALUE, Byte.MIN_VALUE) == 0);
+ assertTrue(Byte.compareUnsigned(Byte.MIN_VALUE, MAX_UNSIGNED_VALUE) < 0);
+
+ assertTrue(Byte.compareUnsigned(MAX_UNSIGNED_VALUE, MIN_UNSIGNED_VALUE) > 0);
+ assertTrue(Byte.compareUnsigned(MAX_UNSIGNED_VALUE, Byte.MAX_VALUE) > 0);
+ assertTrue(Byte.compareUnsigned(MAX_UNSIGNED_VALUE, Byte.MIN_VALUE) > 0);
+ assertTrue(Byte.compareUnsigned(MAX_UNSIGNED_VALUE, MAX_UNSIGNED_VALUE) == 0);
+ }
+
+ private static void assertTrue(boolean value) {
+ if (!value) {
+ throw new AssertionError("Expected <true> but was <false>");
+ }
+ }
+}
