diff --git a/src/main/java/xyz/zhouxy/plusone/commons/util/ArrayTools.java b/src/main/java/xyz/zhouxy/plusone/commons/util/ArrayTools.java
index 5c416f4..9f3c312 100644
--- a/src/main/java/xyz/zhouxy/plusone/commons/util/ArrayTools.java
+++ b/src/main/java/xyz/zhouxy/plusone/commons/util/ArrayTools.java
@@ -179,7 +179,7 @@ public class ArrayTools {
      * @throws IllegalArgumentException 当参数为空时抛出
      */
     public static <T> boolean isAllElementsNotNull(@Nonnull final T[] arr) {
-        AssertTools.checkParameter(arr != null, "The array cannot be null.");
+        AssertTools.checkArgument(arr != null, "The array cannot be null.");
         for (T element : arr) {
             if (element == null) {
                 return false;
diff --git a/src/main/java/xyz/zhouxy/plusone/commons/util/AssertTools.java b/src/main/java/xyz/zhouxy/plusone/commons/util/AssertTools.java
index 95512eb..0c84bda 100644
--- a/src/main/java/xyz/zhouxy/plusone/commons/util/AssertTools.java
+++ b/src/main/java/xyz/zhouxy/plusone/commons/util/AssertTools.java
@@ -29,27 +29,34 @@ import javax.annotation.Nonnull;
  */
 public class AssertTools {
 
-    public static <T> void checkParameterNotNull(String paramName, T value) {
-        checkCondition(value != null,
-                () -> new IllegalArgumentException(String.format("The parameter \"%s\" cannot be null.", paramName)));
+    public static <T> void checkArgumentNotNull(T obj) {
+        checkCondition(obj != null, () -> new IllegalArgumentException("The argument cannot be null."));
     }
 
-    public static <T> void checkParameterNotNull(T obj, String errMsg) {
+    public static <T> void checkArgumentNotNull(T obj, String errMsg) {
         checkCondition(obj != null, () -> new IllegalArgumentException(errMsg));
     }
 
-    public static <T> void checkParameterNotNull(T obj, String format, Object... args) {
+    public static <T> void checkArgumentNotNull(T obj, String format, Object... args) {
         checkCondition(obj != null, () -> new IllegalArgumentException(String.format(format, args)));
     }
 
-    public static void checkParameter(boolean condition, String errMsg) {
+    public static void checkArgument(boolean condition) {
+        checkCondition(condition, IllegalArgumentException::new);
+    }
+
+    public static void checkArgument(boolean condition, String errMsg) {
         checkCondition(condition, () -> new IllegalArgumentException(errMsg));
     }
 
-    public static void checkParameter(boolean condition, String format, Object... args) {
+    public static void checkArgument(boolean condition, String format, Object... args) {
         checkCondition(condition, () -> new IllegalArgumentException(String.format(format, args)));
     }
 
+    public static void checkState(boolean condition) {
+        checkCondition(condition, IllegalStateException::new);
+    }
+
     public static void checkState(boolean condition, String errMsg) {
         checkCondition(condition, () -> new IllegalStateException(errMsg));
     }
diff --git a/src/main/java/xyz/zhouxy/plusone/commons/util/BigDecimals.java b/src/main/java/xyz/zhouxy/plusone/commons/util/BigDecimals.java
index cce0335..cc86677 100644
--- a/src/main/java/xyz/zhouxy/plusone/commons/util/BigDecimals.java
+++ b/src/main/java/xyz/zhouxy/plusone/commons/util/BigDecimals.java
@@ -51,7 +51,7 @@ public class BigDecimals {
      * 使用四舍五入（{@link RoundingMode#HALF_UP}），保留两位小数，转为字符串。
      */
     public static String toPlainString(@Nonnull BigDecimal value) {
-        AssertTools.checkParameterNotNull("value", value);
+        AssertTools.checkArgumentNotNull(value, "The argument \"value\" cannot be null.");
         return toPlainStringInternal(value, DEFAULT_STR_SCALE, DEFAULT_STR_ROUNDING_MODE);
     }
 
@@ -59,7 +59,7 @@ public class BigDecimals {
      * 使用四舍五入（{@link RoundingMode#HALF_UP}），保留指定位的小数，转为字符串。
      */
     public static String toPlainString(@Nonnull BigDecimal value, int scale) {
-        AssertTools.checkParameterNotNull("value", value);
+        AssertTools.checkArgumentNotNull(value, "The argument \"value\" cannot be null.");
         return toPlainStringInternal(value, scale, DEFAULT_STR_ROUNDING_MODE);
     }
 
@@ -67,8 +67,8 @@ public class BigDecimals {
      * 使用指定 {@link RoundingMode}，保留两位小数，转为字符串。
      */
     public static String toPlainString(@Nonnull BigDecimal value, @Nonnull RoundingMode roundingMode) {
-        AssertTools.checkParameterNotNull("value", value);
-        AssertTools.checkParameterNotNull("rounding mode", roundingMode);
+        AssertTools.checkArgumentNotNull(value, "The argument \"value\" cannot be null.");
+        AssertTools.checkArgumentNotNull(roundingMode, "The argument \"rounding mode\" cannot be null.");
         return toPlainStringInternal(value, DEFAULT_STR_SCALE, roundingMode);
     }
 
@@ -77,8 +77,8 @@ public class BigDecimals {
      */
     public static String toPlainString(@Nonnull BigDecimal value,
             int scale, @Nonnull RoundingMode roundingMode) {
-        AssertTools.checkParameterNotNull("value", value);
-        AssertTools.checkParameterNotNull("rounding mode", roundingMode);
+        AssertTools.checkArgumentNotNull(value, "The argument \"value\" cannot be null.");
+        AssertTools.checkArgumentNotNull(roundingMode, "The argument \"rounding mode\" cannot be null.");
         return toPlainStringInternal(value, scale, roundingMode);
     }