diff --git a/src/main/java/xyz/zhouxy/plusone/commons/util/Enumeration.java b/src/main/java/xyz/zhouxy/plusone/commons/util/Enumeration.java
index 744fdca..4845d55 100644
--- a/src/main/java/xyz/zhouxy/plusone/commons/util/Enumeration.java
+++ b/src/main/java/xyz/zhouxy/plusone/commons/util/Enumeration.java
@@ -31,7 +31,7 @@ public abstract class Enumeration<T extends Enumeration<T>> implements Comparabl
     @Nonnull
     protected final String name;
 
-    protected Enumeration(int id, @Nonnull String name) {
+    protected Enumeration(final int id, @Nonnull final String name) {
         this.id = id;
         this.name = name;
     }
@@ -46,7 +46,7 @@ public abstract class Enumeration<T extends Enumeration<T>> implements Comparabl
     }
 
     @Override
-    public final int compareTo(T o) {
+    public final int compareTo(final T o) {
         return Integer.compare(this.id, o.id);
     }
 
@@ -56,7 +56,7 @@ public abstract class Enumeration<T extends Enumeration<T>> implements Comparabl
     }
 
     @Override
-    public final boolean equals(Object obj) {
+    public final boolean equals(final Object obj) {
         if (this == obj)
             return true;
         if (obj == null)
@@ -70,7 +70,7 @@ public abstract class Enumeration<T extends Enumeration<T>> implements Comparabl
     @Override
     @Nonnull
     public final String toString() {
-        return getClass().getSimpleName() + "[" + id + ": " + name + "]";
+        return getClass().getSimpleName() + '(' + id + ":" + name + ')';
     }
 
     protected static final class ValueSet<T extends Enumeration<T>> {
@@ -83,12 +83,12 @@ public abstract class Enumeration<T extends Enumeration<T>> implements Comparabl
             }
         }
 
-        private void put(@Nonnull T value) {
+        private void put(@Nonnull final T value) {
             this.values.put(value.getId(), value);
         }
 
         @Nonnull
-        public T get(int id) {
+        public T get(final int id) {
             return Objects.requireNonNull(this.values.get(id));
         }
 
diff --git a/src/test/java/xyz/zhouxy/plusone/commons/EnumerationTests.java b/src/test/java/xyz/zhouxy/plusone/commons/EnumerationTests.java
index 6e6d552..eb73a9e 100644
--- a/src/test/java/xyz/zhouxy/plusone/commons/EnumerationTests.java
+++ b/src/test/java/xyz/zhouxy/plusone/commons/EnumerationTests.java
@@ -1,7 +1,9 @@
 package xyz.zhouxy.plusone.commons;
 
 import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertTrue;
 
+import com.google.common.collect.Lists;
 import lombok.extern.slf4j.Slf4j;
 import org.junit.jupiter.api.Test;
 
@@ -15,8 +17,14 @@ class EnumerationTests {
 
     @Test
     void testEnumeration() {
-        assertEquals(EntityStatus.AVAILABLE, EntityStatus.of(0));
-        log.info(EntityStatus.constants().toString());
+        assertTrue(EntityStatus.AVAILABLE == EntityStatus.of(0));
+        assertTrue(Result.SUCCESSFUL == Result.of(1));
+        Collection<Comparable<? extends Enumeration<?>>> enums = Lists.newArrayList();
+        enums.addAll(EntityStatus.constants());
+        enums.addAll(Result.constants());
+        for (Comparable<? extends Enumeration<?>> anEnum : enums) {
+            log.info(anEnum.toString());
+        }
     }
 }
 
@@ -30,16 +38,37 @@ final class EntityStatus extends Enumeration<EntityStatus> {
     public static final EntityStatus AVAILABLE = new EntityStatus(0, "正常");
     public static final EntityStatus DISABLED = new EntityStatus(1, "禁用");
 
-    private static final ValueSet<EntityStatus> ENUMERATION_VALUES = new ValueSet<>(
+    private static final ValueSet<EntityStatus> VALUE_SET = new ValueSet<>(
             AVAILABLE, DISABLED);
 
     @Nonnull
     public static EntityStatus of(int value) {
-        return ENUMERATION_VALUES.get(value);
+        return VALUE_SET.get(value);
     }
 
     @Nonnull
     public static Collection<EntityStatus> constants() {
-        return ENUMERATION_VALUES.getValues();
+        return VALUE_SET.getValues();
+    }
+}
+
+final class Result extends Enumeration<Result> {
+    private Result(int id, @Nonnull String name) {
+        super(id, name);
+    }
+
+    public static final Result SUCCESSFUL = new Result(1, "成功");
+    public static final Result FAILURE = new Result(0, "失败");
+
+    private static final ValueSet<Result> VALUE_SET = new ValueSet<>(SUCCESSFUL, FAILURE);
+
+    @Nonnull
+    public static Result of(int id) {
+        return VALUE_SET.get(id);
+    }
+
+    @Nonnull
+    public static Collection<Result> constants() {
+        return VALUE_SET.getValues();
     }
 }