src.setAaa("111");
        src.setCcc("333");

        final MyClass2 dest = new MyClass2();
        dest.setAaa("aaa");
        dest.setBbb("bbb");
        dest.setDdd("ddd");

        BeanUtil.copyBeanToBean(src, dest);
        assertThat(dest.getAaa(), is("111"));
        assertThat(dest.getBbb(), is(nullValue()));
        assertThat(dest.getDdd(), is("ddd"));
    }

    /**
     * @throws Exception
     */

  /**
   * Copies bytes from this hash code into {@code dest}.
   *
   * @param dest the byte array into which the hash code will be written
   * @param offset the start offset in the data
   * @param maxLength the maximum number of bytes to write
   * @return the number of bytes written to {@code dest}
   * @throws IndexOutOfBoundsException if there is not enough room in {@code dest}
   */
  @CanIgnoreReturnValue

   * previously at {@code src} has already been removed from the data structures.
   */
  private void moveEntryToIndex(int src, int dest) {
    if (src == dest) {
      return;
    }
    int predecessor = prevInInsertionOrder[src];
    int successor = nextInInsertionOrder[src];
    setSucceeds(predecessor, dest);
    setSucceeds(dest, successor);

     * @param dest The destination Bean. Must not be {@literal null}.
     */
    public static void copyBeanToBean(final Object src, final Object dest) {
        copyBeanToBean(src, dest, DEFAULT_OPTIONS);
    }

    /**
     * Copies properties from one Bean to another Bean.
     *
     * @param src The source Bean. Must not be {@literal null}.

     *
     * @param src the source bean object
     * @param dest the destination bean object
     * @param option a consumer function to configure copy options
     */
    protected static void copyBeanToBean(final Object src, final Object dest, final Consumer<CopyOptions> option) {
        BeanUtil.copyBeanToBean(src, dest, option);
    }

    /**
     * Copies properties from a map to a bean object.

		</antcall>

		<antcall target="remove.jars" />
	</target>

	<target name="install.plugin">
		<get dest="${target.dir}">
			<url url="${repo.url}/${plugin.groupId}/${plugin.name.prefix}${plugin.name}/${plugin.version}/${plugin.name.prefix}${plugin.name}-${plugin.zip.version}.zip" />
		</get>
		<unzip dest="${plugins.dir}/${plugin.name}" src="${target.dir}/${plugin.name.prefix}${plugin.name}-${plugin.zip.version}.zip">
			<patternset>

		</antcall>

		<antcall target="remove.jars" />
	</target>

	<target name="install.module">
		<get dest="${target.dir}">
			<url url="${repo.url}/${module.groupId}/${module.name.prefix}${module.name}/${module.version}/${module.name.prefix}${module.name}-${module.zip.version}.zip" />
		</get>
		<unzip dest="${modules.dir}/${module.name}" src="${target.dir}/${module.name.prefix}${module.name}-${module.zip.version}.zip">
			<patternset>

		</condition>
	</target>

	<target name="download.dbflute" depends="mydbflute.check" unless="mydbflute.exists">
		<mkdir dir="${mydbflute.dir}" />
		<get dest="${target.dir}/mydbflute.zip">
			<url url="${mydbflute.url}" />
		</get>
		<unzip dest="${mydbflute.dir}" src="${target.dir}/mydbflute.zip">
			<patternset>
				<include name="lastaflute-example-waterfront-${branch.name}/mydbflute/dbflute-1.x/**" />
			</patternset>

    arrayCopy(array, paramCount, others);
    return new RegularImmutableList<E>(ImmutableList.<E>nullCheckedList(array));
  }

  private static void arrayCopy(Object[] dest, int pos, Object... source) {
    System.arraycopy(source, 0, dest, pos, source.length);
  }

  /** ImmutableList.of API that is friendly to use from JavaScript. */
  @JsMethod(name = "of")
  static <E> ImmutableList<E> jsOf(E... elements) {

git clone https://github.com/codelibs/corelib.git
cd corelib

# Compile the project
mvn clean compile

# Run all tests
mvn test

# Run specific test class
mvn test -Dtest=BeanUtilTest

# Run specific test method  
mvn test -Dtest=BeanUtilTest#testCopyBeanToBean
```

### Code Quality and Formatting
```bash
# Format code according to project standards
mvn formatter:format