diff --git a/src/main/java/com/github/stephengold/joltjni/Color.java b/src/main/java/com/github/stephengold/joltjni/Color.java
index ee3ab5bf..8bd1739a 100644
--- a/src/main/java/com/github/stephengold/joltjni/Color.java
+++ b/src/main/java/com/github/stephengold/joltjni/Color.java
@@ -1,5 +1,5 @@
 /*
-Copyright (c) 2024 Stephen Gold
+Copyright (c) 2024-2025 Stephen Gold
 
 Permission is hereby granted, free of charge, to any person obtaining a copy
 of this software and associated documentation files (the "Software"), to deal
@@ -236,7 +236,7 @@ public void setR(int r) {
     }
 
     /**
-     * Alter the all components.
+     * Alter all components.
      *
      * @param u32 the desired 32-bit value
      */
diff --git a/src/main/java/com/github/stephengold/joltjni/Vec3.java b/src/main/java/com/github/stephengold/joltjni/Vec3.java
index a9e19102..f7da0292 100644
--- a/src/main/java/com/github/stephengold/joltjni/Vec3.java
+++ b/src/main/java/com/github/stephengold/joltjni/Vec3.java
@@ -486,7 +486,7 @@ public void standardizeInPlace() {
     /**
      * Return the component-wise sum of the specified vectors.
      *
-     * @param vArray an array of input vector (not null, unaffected)
+     * @param vArray an array of input vectors (not null, unaffected)
      * @return a new vector
      */
     public static Vec3 sum(Vec3Arg... vArray) {
@@ -691,7 +691,7 @@ public boolean isNearZero() {
     }
 
     /**
-     * Test whether the the squared length is within the specified tolerance of
+     * Test whether the squared length is within the specified tolerance of
      * zero. The vector is unaffected.
      *
      * @param tolerance the desired tolerance (≥0. default=1e-12)
diff --git a/src/main/java/com/github/stephengold/joltjni/VehicleConstraintSettings.java b/src/main/java/com/github/stephengold/joltjni/VehicleConstraintSettings.java
index cbacec78..42080460 100644
--- a/src/main/java/com/github/stephengold/joltjni/VehicleConstraintSettings.java
+++ b/src/main/java/com/github/stephengold/joltjni/VehicleConstraintSettings.java
@@ -186,7 +186,7 @@ public WheelSettings[] getWheels() {
     }
 
     /**
-     * Alter how the the vehicle accelerates and decelerates. (native attribute:
+     * Alter how the vehicle accelerates and decelerates. (native attribute:
      * mController)
      *
      * @param controllerSettings the desired settings (not null)
diff --git a/src/main/java/com/github/stephengold/joltjni/readonly/Vec3Arg.java b/src/main/java/com/github/stephengold/joltjni/readonly/Vec3Arg.java
index 79e819e3..9c2fe241 100644
--- a/src/main/java/com/github/stephengold/joltjni/readonly/Vec3Arg.java
+++ b/src/main/java/com/github/stephengold/joltjni/readonly/Vec3Arg.java
@@ -130,7 +130,7 @@ public interface Vec3Arg {
     boolean isNearZero();
 
     /**
-     * Test whether the the squared length is within the specified tolerance of
+     * Test whether the squared length is within the specified tolerance of
      * zero. The vector is unaffected.
      *
      * @param tolerance the desired tolerance (≥0. default=1e-12)