Address more ConstantCaseForConstants warnings.

There are still so many more, but I ran out of steam.

Also, in Truth's `Platform` class, migrate off the deprecated `Splitter.onPattern`, and start using the now-non-`@Beta` `splitToList`.

PiperOrigin-RevId: 710166260

android/guava-tests/benchmark/com/google/common/primitives/UnsignedLongsBenchmark.java

@@ -30,7 +30,7 @@
 public class UnsignedLongsBenchmark {
   private static final int ARRAY_SIZE = 0x10000;
   private static final int ARRAY_MASK = 0x0ffff;
-  private static final Random RANDOM_SOURCE = new Random(314159265358979L);
+  private static final Random randomSource = new Random(314159265358979L);
   private static final long[] longs = new long[ARRAY_SIZE];
   private static final long[] divisors = new long[ARRAY_SIZE];
   private static final String[] decimalStrings = new String[ARRAY_SIZE];
@@ -122,7 +122,7 @@ int toString(int reps) {
   }
 
   private static long random() {
-    return RANDOM_SOURCE.nextLong();
+    return randomSource.nextLong();
   }
 
   // A random value that cannot be 0 and that is unsigned-less-than or equal
@@ -131,7 +131,7 @@ private static long random() {
   // Using remainder here does not give us a uniform distribution but it should
   // not have a big impact on the measurement.
   private static long randomDivisor(long dividend) {
-    long r = RANDOM_SOURCE.nextLong();
+    long r = randomSource.nextLong();
     if (dividend == -1) {
       return r;
     } else {

android/guava-tests/test/com/google/common/base/JoinerTest.java

@@ -50,17 +50,17 @@ public class JoinerTest extends TestCase {
   private static final Joiner J = Joiner.on("-");
 
   // <Integer> needed to prevent warning :(
-  private static final Iterable<Integer> ITERABLE_ = Arrays.<Integer>asList();
-  private static final Iterable<Integer> ITERABLE_1 = Arrays.asList(1);
-  private static final Iterable<Integer> ITERABLE_12 = Arrays.asList(1, 2);
-  private static final Iterable<Integer> ITERABLE_123 = Arrays.asList(1, 2, 3);
-  private static final Iterable<@Nullable Integer> ITERABLE_NULL = Arrays.asList((Integer) null);
-  private static final Iterable<@Nullable Integer> ITERABLE_NULL_NULL =
+  private static final Iterable<Integer> iterable = Arrays.<Integer>asList();
+  private static final Iterable<Integer> iterable1 = Arrays.asList(1);
+  private static final Iterable<Integer> iterable12 = Arrays.asList(1, 2);
+  private static final Iterable<Integer> iterable123 = Arrays.asList(1, 2, 3);
+  private static final Iterable<@Nullable Integer> iterableNull = Arrays.asList((Integer) null);
+  private static final Iterable<@Nullable Integer> iterableNullNull =
       Arrays.asList((Integer) null, null);
-  private static final Iterable<@Nullable Integer> ITERABLE_NULL_1 = Arrays.asList(null, 1);
-  private static final Iterable<@Nullable Integer> ITERABLE_1_NULL = Arrays.asList(1, null);
-  private static final Iterable<@Nullable Integer> ITERABLE_1_NULL_2 = Arrays.asList(1, null, 2);
-  private static final Iterable<@Nullable Integer> ITERABLE_FOUR_NULLS =
+  private static final Iterable<@Nullable Integer> iterableNull1 = Arrays.asList(null, 1);
+  private static final Iterable<@Nullable Integer> iterable1Null = Arrays.asList(1, null);
+  private static final Iterable<@Nullable Integer> iterable1Null2 = Arrays.asList(1, null, 2);
+  private static final Iterable<@Nullable Integer> iterableFourNulls =
       Arrays.asList((Integer) null, null, null, null);
 
   /*
@@ -107,60 +107,60 @@ public int size() {
 
   @SuppressWarnings("JoinIterableIterator") // explicitly testing iterator overload, too
   public void testNoSpecialNullBehavior() {
-    checkNoOutput(J, ITERABLE_);
-    checkResult(J, ITERABLE_1, "1");
-    checkResult(J, ITERABLE_12, "1-2");
-    checkResult(J, ITERABLE_123, "1-2-3");
+    checkNoOutput(J, iterable);
+    checkResult(J, iterable1, "1");
+    checkResult(J, iterable12, "1-2");
+    checkResult(J, iterable123, "1-2-3");
     checkResult(J, UNDERREPORTING_SIZE_LIST, "1-2-3");
     checkResult(J, OVERREPORTING_SIZE_LIST, "1-2-3");
 
-    assertThrows(NullPointerException.class, () -> J.join(ITERABLE_NULL));
-    assertThrows(NullPointerException.class, () -> J.join(ITERABLE_1_NULL_2));
+    assertThrows(NullPointerException.class, () -> J.join(iterableNull));
+    assertThrows(NullPointerException.class, () -> J.join(iterable1Null2));
 
-    assertThrows(NullPointerException.class, () -> J.join(ITERABLE_NULL.iterator()));
-    assertThrows(NullPointerException.class, () -> J.join(ITERABLE_1_NULL_2.iterator()));
+    assertThrows(NullPointerException.class, () -> J.join(iterableNull.iterator()));
+    assertThrows(NullPointerException.class, () -> J.join(iterable1Null2.iterator()));
   }
 
   public void testOnCharOverride() {
     Joiner onChar = Joiner.on('-');
-    checkNoOutput(onChar, ITERABLE_);
-    checkResult(onChar, ITERABLE_1, "1");
-    checkResult(onChar, ITERABLE_12, "1-2");
-    checkResult(onChar, ITERABLE_123, "1-2-3");
+    checkNoOutput(onChar, iterable);
+    checkResult(onChar, iterable1, "1");
+    checkResult(onChar, iterable12, "1-2");
+    checkResult(onChar, iterable123, "1-2-3");
     checkResult(J, UNDERREPORTING_SIZE_LIST, "1-2-3");
     checkResult(J, OVERREPORTING_SIZE_LIST, "1-2-3");
   }
 
   public void testSkipNulls() {
     Joiner skipNulls = J.skipNulls();
-    checkNoOutput(skipNulls, ITERABLE_);
-    checkNoOutput(skipNulls, ITERABLE_NULL);
-    checkNoOutput(skipNulls, ITERABLE_NULL_NULL);
-    checkNoOutput(skipNulls, ITERABLE_FOUR_NULLS);
-    checkResult(skipNulls, ITERABLE_1, "1");
-    checkResult(skipNulls, ITERABLE_12, "1-2");
-    checkResult(skipNulls, ITERABLE_123, "1-2-3");
+    checkNoOutput(skipNulls, iterable);
+    checkNoOutput(skipNulls, iterableNull);
+    checkNoOutput(skipNulls, iterableNullNull);
+    checkNoOutput(skipNulls, iterableFourNulls);
+    checkResult(skipNulls, iterable1, "1");
+    checkResult(skipNulls, iterable12, "1-2");
+    checkResult(skipNulls, iterable123, "1-2-3");
     checkResult(J, UNDERREPORTING_SIZE_LIST, "1-2-3");
     checkResult(J, OVERREPORTING_SIZE_LIST, "1-2-3");
-    checkResult(skipNulls, ITERABLE_NULL_1, "1");
-    checkResult(skipNulls, ITERABLE_1_NULL, "1");
-    checkResult(skipNulls, ITERABLE_1_NULL_2, "1-2");
+    checkResult(skipNulls, iterableNull1, "1");
+    checkResult(skipNulls, iterable1Null, "1");
+    checkResult(skipNulls, iterable1Null2, "1-2");
   }
 
   public void testUseForNull() {
     Joiner zeroForNull = J.useForNull("0");
-    checkNoOutput(zeroForNull, ITERABLE_);
-    checkResult(zeroForNull, ITERABLE_1, "1");
-    checkResult(zeroForNull, ITERABLE_12, "1-2");
-    checkResult(zeroForNull, ITERABLE_123, "1-2-3");
+    checkNoOutput(zeroForNull, iterable);
+    checkResult(zeroForNull, iterable1, "1");
+    checkResult(zeroForNull, iterable12, "1-2");
+    checkResult(zeroForNull, iterable123, "1-2-3");
     checkResult(J, UNDERREPORTING_SIZE_LIST, "1-2-3");
     checkResult(J, OVERREPORTING_SIZE_LIST, "1-2-3");
-    checkResult(zeroForNull, ITERABLE_NULL, "0");
-    checkResult(zeroForNull, ITERABLE_NULL_NULL, "0-0");
-    checkResult(zeroForNull, ITERABLE_NULL_1, "0-1");
-    checkResult(zeroForNull, ITERABLE_1_NULL, "1-0");
-    checkResult(zeroForNull, ITERABLE_1_NULL_2, "1-0-2");
-    checkResult(zeroForNull, ITERABLE_FOUR_NULLS, "0-0-0-0");
+    checkResult(zeroForNull, iterableNull, "0");
+    checkResult(zeroForNull, iterableNullNull, "0-0");
+    checkResult(zeroForNull, iterableNull1, "0-1");
+    checkResult(zeroForNull, iterable1Null, "1-0");
+    checkResult(zeroForNull, iterable1Null2, "1-0-2");
+    checkResult(zeroForNull, iterableFourNulls, "0-0-0-0");
   }
 
   private static void checkNoOutput(Joiner joiner, Iterable<Integer> set) {

android/guava-tests/test/com/google/common/base/PreconditionsTest.java

@@ -392,7 +392,7 @@ private Object[] getParametersForSignature(
     return params;
   }
 
-  private static final ImmutableList<Class<?>> possibleParamTypes =
+  private static final ImmutableList<Class<?>> POSSIBLE_PARAM_TYPES =
       ImmutableList.of(char.class, int.class, long.class, Object.class);
 
   /**
@@ -410,7 +410,7 @@ private static ImmutableList<ImmutableList<Class<?>>> allSignatures(Class<?> pre
 
     List<List<Class<?>>> typesLists = new ArrayList<>();
     for (int i = 0; i < 2; i++) {
-      typesLists.add(possibleParamTypes);
+      typesLists.add(POSSIBLE_PARAM_TYPES);
       for (List<Class<?>> curr : Lists.cartesianProduct(typesLists)) {
         allOverloads.add(
             ImmutableList.<Class<?>>builder()

android/guava-tests/test/com/google/common/collect/AbstractImmutableSortedMapMapInterfaceTest.java

@@ -39,7 +39,7 @@ protected SortedMap<K, V> makeEmptyMap() {
     throw new UnsupportedOperationException();
   }
 
-  private static final Joiner joiner = Joiner.on(", ");
+  private static final Joiner JOINER = Joiner.on(", ");
 
   @Override
   protected void assertMoreInvariants(Map<K, V> map) {
@@ -48,10 +48,10 @@ protected void assertMoreInvariants(Map<K, V> map) {
       assertEquals(entry.getKey() + "=" + entry.getValue(), entry.toString());
     }
 
-    assertEquals("{" + joiner.join(map.entrySet()) + "}", map.toString());
-    assertEquals("[" + joiner.join(map.entrySet()) + "]", map.entrySet().toString());
-    assertEquals("[" + joiner.join(map.keySet()) + "]", map.keySet().toString());
-    assertEquals("[" + joiner.join(map.values()) + "]", map.values().toString());
+    assertEquals("{" + JOINER.join(map.entrySet()) + "}", map.toString());
+    assertEquals("[" + JOINER.join(map.entrySet()) + "]", map.entrySet().toString());
+    assertEquals("[" + JOINER.join(map.keySet()) + "]", map.keySet().toString());
+    assertEquals("[" + JOINER.join(map.values()) + "]", map.values().toString());
 
     assertEquals(newHashSet(map.entrySet()), map.entrySet());
     assertEquals(newHashSet(map.keySet()), map.keySet());

android/guava-tests/test/com/google/common/collect/GeneralRangeTest.java

@@ -17,13 +17,14 @@
 import static com.google.common.collect.BoundType.CLOSED;
 import static com.google.common.collect.BoundType.OPEN;
 import static com.google.common.collect.ReflectionFreeAssertThrows.assertThrows;
-import static java.util.Arrays.asList;
+import static java.util.Collections.unmodifiableList;
 
 import com.google.common.annotations.GwtCompatible;
 import com.google.common.annotations.GwtIncompatible;
 import com.google.common.annotations.J2ktIncompatible;
 import com.google.common.base.Objects;
 import com.google.common.testing.NullPointerTester;
+import java.util.Arrays;
 import java.util.List;
 import junit.framework.TestCase;
 import org.jspecify.annotations.NullMarked;
@@ -40,7 +41,8 @@ public class GeneralRangeTest extends TestCase {
   private static final Ordering<@Nullable Integer> ORDERING =
       Ordering.<Integer>natural().<Integer>nullsFirst();
 
-  private static final List<@Nullable Integer> IN_ORDER_VALUES = asList(null, 1, 2, 3, 4, 5);
+  private static final List<@Nullable Integer> IN_ORDER_VALUES =
+      unmodifiableList(Arrays.<@Nullable Integer>asList(null, 1, 2, 3, 4, 5));
 
   public void testCreateEmptyRangeFails() {
     for (BoundType lboundType : BoundType.values()) {

android/guava-tests/test/com/google/common/graph/PackageSanityTests.java

@@ -31,19 +31,19 @@
 @NullUnmarked
 public class PackageSanityTests extends AbstractPackageSanityTests {
 
-  private static final AbstractGraphBuilder<?> GRAPH_BUILDER_A =
+  private static final AbstractGraphBuilder<?> graphBuilderA =
       GraphBuilder.directed().expectedNodeCount(10);
-  private static final AbstractGraphBuilder<?> GRAPH_BUILDER_B =
+  private static final AbstractGraphBuilder<?> graphBuilderB =
       ValueGraphBuilder.directed().allowsSelfLoops(true).expectedNodeCount(16);
 
   private static final ImmutableGraph<String> IMMUTABLE_GRAPH_A =
       GraphBuilder.directed().<String>immutable().addNode("A").build();
   private static final ImmutableGraph<String> IMMUTABLE_GRAPH_B =
       GraphBuilder.directed().<String>immutable().addNode("B").build();
 
-  private static final NetworkBuilder<?, ?> NETWORK_BUILDER_A =
+  private static final NetworkBuilder<?, ?> networkBuilderA =
       NetworkBuilder.directed().allowsParallelEdges(true).expectedNodeCount(10);
-  private static final NetworkBuilder<?, ?> NETWORK_BUILDER_B =
+  private static final NetworkBuilder<?, ?> networkBuilderB =
       NetworkBuilder.directed().allowsSelfLoops(true).expectedNodeCount(16);
 
   private static final ImmutableNetwork<String, String> IMMUTABLE_NETWORK_A =
@@ -57,10 +57,10 @@ public PackageSanityTests() {
     MutableNetwork<String, String> mutableNetworkB = NetworkBuilder.directed().build();
     mutableNetworkB.addNode("b");
 
-    setDistinctValues(AbstractGraphBuilder.class, GRAPH_BUILDER_A, GRAPH_BUILDER_B);
+    setDistinctValues(AbstractGraphBuilder.class, graphBuilderA, graphBuilderB);
     setDistinctValues(Graph.class, IMMUTABLE_GRAPH_A, IMMUTABLE_GRAPH_B);
     setDistinctValues(MutableNetwork.class, mutableNetworkA, mutableNetworkB);
-    setDistinctValues(NetworkBuilder.class, NETWORK_BUILDER_A, NETWORK_BUILDER_B);
+    setDistinctValues(NetworkBuilder.class, networkBuilderA, networkBuilderB);
     setDistinctValues(Network.class, IMMUTABLE_NETWORK_A, IMMUTABLE_NETWORK_B);
     setDefault(EndpointPair.class, EndpointPair.ordered("A", "B"));
   }

android/guava-tests/test/com/google/common/hash/Crc32cHashFunctionTest.java

@@ -126,7 +126,7 @@ public void testAgainstSimplerImplementation() {
   private static int referenceCrc(byte[] bytes) {
     int crc = ~0;
     for (byte b : bytes) {
-      crc = (crc >>> 8) ^ Crc32cHashFunction.Crc32cHasher.BYTE_TABLE[(crc ^ b) & 0xFF];
+      crc = (crc >>> 8) ^ Crc32cHashFunction.Crc32cHasher.byteTable[(crc ^ b) & 0xFF];
     }
     return ~crc;
   }
@@ -169,7 +169,7 @@ public void testCrc32cByteTable() {
       expected[i] = crc;
     }
 
-    int[] actual = Crc32cHashFunction.Crc32cHasher.BYTE_TABLE;
+    int[] actual = Crc32cHashFunction.Crc32cHasher.byteTable;
     assertTrue(
         "Expected: \n" + Arrays.toString(expected) + "\nActual:\n" + Arrays.toString(actual),
         Arrays.equals(expected, actual));
@@ -186,7 +186,7 @@ static int advanceOneBit(int next) {
   public void testCrc32cStrideTable() {
     int next = CRC32C_GENERATOR_FLIPPED;
     for (int i = 0; i < 12; i++) { // for 3 ints = 12 bytes in between each stride window
-      next = (next >>> 8) ^ Crc32cHashFunction.Crc32cHasher.BYTE_TABLE[next & 0xFF];
+      next = (next >>> 8) ^ Crc32cHashFunction.Crc32cHasher.byteTable[next & 0xFF];
     }
     int[][] expected = new int[4][256];
     for (int b = 0; b < 4; ++b) {
@@ -204,7 +204,7 @@ public void testCrc32cStrideTable() {
       }
     }
 
-    int[][] actual = Crc32cHashFunction.Crc32cHasher.STRIDE_TABLE;
+    int[][] actual = Crc32cHashFunction.Crc32cHasher.strideTable;
     assertTrue(
         "Expected: \n"
             + Arrays.deepToString(expected)

android/guava-tests/test/com/google/common/io/LineBufferTest.java

@@ -20,6 +20,7 @@
 import static java.lang.Math.min;
 
 import com.google.common.base.Function;
+import com.google.common.collect.ImmutableSet;
 import com.google.common.collect.Lists;
 import java.io.BufferedReader;
 import java.io.FilterReader;
@@ -58,7 +59,8 @@ public void testProcess() throws IOException {
     bufferHelper("mixed\nline\rendings\r\n", "mixed\n", "line\r", "endings\r\n");
   }
 
-  private static final int[] CHUNK_SIZES = {1, 2, 3, Integer.MAX_VALUE};
+  private static final ImmutableSet<Integer> CHUNK_SIZES =
+      ImmutableSet.of(1, 2, 3, Integer.MAX_VALUE);
 
   private static void bufferHelper(String input, String... expect) throws IOException {
 

android/guava-tests/test/com/google/common/math/DoubleMathTest.java

@@ -51,7 +51,6 @@
 import java.math.BigInteger;
 import java.math.RoundingMode;
 import java.util.Arrays;
-import java.util.List;
 import junit.framework.TestCase;
 import org.jspecify.annotations.NullUnmarked;
 
@@ -512,17 +511,20 @@ public void testFactorialNegative() {
       ImmutableList.of(-0.0, 0.0, 1.0, 100.0, 10000.0, Double.MAX_VALUE);
 
   private static final Iterable<Double> TOLERANCE_CANDIDATES =
-      Iterables.concat(FINITE_TOLERANCE_CANDIDATES, ImmutableList.of(Double.POSITIVE_INFINITY));
-
-  private static final List<Double> BAD_TOLERANCE_CANDIDATES =
-      Doubles.asList(
-          -Double.MIN_VALUE,
-          -Double.MIN_NORMAL,
-          -1,
-          -20,
-          Double.NaN,
-          Double.NEGATIVE_INFINITY,
-          -0.001);
+      ImmutableList.copyOf(
+          Iterables.concat(
+              FINITE_TOLERANCE_CANDIDATES, ImmutableList.of(Double.POSITIVE_INFINITY)));
+
+  private static final ImmutableList<Double> BAD_TOLERANCE_CANDIDATES =
+      ImmutableList.copyOf(
+          Doubles.asList(
+              -Double.MIN_VALUE,
+              -Double.MIN_NORMAL,
+              -1,
+              -20,
+              Double.NaN,
+              Double.NEGATIVE_INFINITY,
+              -0.001));
 
   public void testFuzzyEqualsFinite() {
     for (double a : FINITE_DOUBLE_CANDIDATES) {

android/guava-tests/test/com/google/common/math/QuantilesAlgorithmTest.java

@@ -23,7 +23,6 @@
 import com.google.common.collect.Sets;
 import java.util.Map;
 import java.util.Random;
-import java.util.Set;
 import junit.framework.TestCase;
 import org.jspecify.annotations.NullUnmarked;
 
@@ -34,21 +33,23 @@
 @NullUnmarked
 public class QuantilesAlgorithmTest extends TestCase {
 
-  private static final Random RNG = new Random(82674067L);
+  private static final Random rng = new Random(82674067L);
   private static final int DATASET_SIZE = 1000;
   private static final double ALLOWED_ERROR = 1.0e-10;
   private static final QuantilesAlgorithm REFERENCE_ALGORITHM = QuantilesAlgorithm.SORTING;
-  private static final Set<QuantilesAlgorithm> NON_REFERENCE_ALGORITHMS =
+  private static final ImmutableSet<QuantilesAlgorithm> NON_REFERENCE_ALGORITHMS =
       Sets.difference(
-          ImmutableSet.copyOf(QuantilesAlgorithm.values()), ImmutableSet.of(REFERENCE_ALGORITHM));
+              ImmutableSet.copyOf(QuantilesAlgorithm.values()),
+              ImmutableSet.of(REFERENCE_ALGORITHM))
+          .immutableCopy();
 
   private double[] dataset;
 
   @Override
   protected void setUp() {
     dataset = new double[DATASET_SIZE];
     for (int i = 0; i < DATASET_SIZE; i++) {
-      dataset[i] = RNG.nextDouble();
+      dataset[i] = rng.nextDouble();
     }
   }