//        assertThat(new SimpleDateFormat("yyyy/MM/dd HH:mm:ss").format(date), is("2010/09/07 11:49:10"));
    //    }

    /**
     * @throws Exception
     */
    @Test
    public void testToDate_SpecificPattern() throws Exception {
        final Date date = toDate("07/09/10 10:49:11", "dd/MM/yy ss:mm:HH", Locale.JAPAN);
        assertThat(new SimpleDateFormat("yyyy/MM/dd HH:mm:ss").format(date), is("2010/09/07 11:49:10"));

 * <td rowspan="4">Standard formats of {@link DateFormat}</td>
 * <td>{@link DateFormat#SHORT} format</td>
 * <td>{@literal yy/MM/dd}</td>
 * </tr>
 * <tr>
 * <td>{@link DateFormat#MEDIUM} format</td>
 * <td>{@literal yyyy/MM/dd}</td>
 * </tr>
 * <tr>
 * <td>{@link DateFormat#LONG} format</td>
 * <td>{@literal yyyy/MM/dd}</td>
 * </tr>
 * <tr>
 * <td>{@link DateFormat#FULL} format</td>
 * <td>{@literal yyyy'nen'M'gatsu'd'nichi'}</td>

                                                 title="yyyy-MM-dd'T'HH:mm:ss.SSS'Z'"
                                                 data-validation="custom"
                                                 data-validation-regexp="(^$|^[1-9]\d{3}\-\d\d\-\d\dT\d\d\:\d\d\:\d\d\.\d{3}Z$)"
                                                 data-validation-help="yyyy-MM-dd'T'HH:mm:ss.SSS'Z'"/>
                                    </div>

 * <td>{@literal yy/MM/dd H:mm}</td>
 * </tr>
 * <tr>
 * <td>{@link DateFormat#MEDIUM} format</td>
 * <td>{@literal yyyy/MM/dd H:mm:ss}</td>
 * </tr>
 * <tr>
 * <td>{@link DateFormat#LONG} format</td>
 * <td>{@literal yyyy/MM/dd H:mm:ss z}</td>
 * </tr>
 * <tr>
 * <td>{@link DateFormat#FULL} format</td>
 * <td>{@literal yyyy'年'M'月'd'日' H'時'mm'分'ss'秒' z}</td>
 * </tr>
 * </table>
 *

                                                            pattern="yyyy-MM-dd'T'HH:mm:ss"/></td>
                                                    <td><c:if test="${data.endTime!=null}">
                                                        <fmt:formatDate value="${fe:date(data.endTime)}"
                                                                        pattern="yyyy-MM-dd'T'HH:mm:ss"/>

        assertContentType("application/x-lharc", "extractor/lha/test.lzh", "hoge.lzh"); // TODO is it correct?

        assertContentType("application/xml", "extractor/test.mm", "hoge.mm");

        assertContentType("message/rfc822", "extractor/eml/sample1.eml", "sample1.eml");

        assertContentType("application/octet-stream", null, "hoge");

Integer nullValue = IntegerConversionUtil.toInteger(null);     // Returns null
Boolean flag = BooleanConversionUtil.toBoolean("true");        // Returns true
Date date = DateConversionUtil.toDate("2023-12-25", "yyyy-MM-dd");

// Primitive conversions with default values
int primitiveInt = IntegerConversionUtil.toPrimitiveInt(value, "0");  // Default to 0 if null
```

### Collection Utilities with Java 21 Support
```java

		if m := errRE.FindStringSubmatch(line); m != nil {
			all := m[1]
			mm := errQuotesRE.FindAllStringSubmatch(all, -1)
			if len(mm) != 1 {
				t.Errorf("%s: invalid errorcheck line:\n%s", fileline, line)
			} else if err := errors[fileline]; err == "" {
				t.Errorf("%s: missing error, want %s", fileline, all)
			} else if !strings.Contains(err, mm[0][1]) {
				t.Errorf("%s: wrong error for %s:\n%s", fileline, all, err)
			}

    BiPredicate<ImmutableSetMultimap<?, ?>, ImmutableSetMultimap<?, ?>> equivalence =
        Equivalence.equals()
            .onResultOf(
                (ImmutableSetMultimap<?, ?> mm) ->
                    ImmutableListMultimap.copyOf(mm).asMap().entrySet().asList())
            .and(Equivalence.equals());
    CollectorTester.of(collector, equivalence)
        .expectCollects(ImmutableSetMultimap.of())
        .expectCollects(

            if (pos != -1) {
                buf.replace(pos, pos + 1, "HH");
            }
        }
        if (buf.indexOf("mm") == -1) {
            final int pos = buf.indexOf("m");
            if (pos != -1) {
                buf.replace(pos, pos + 1, "mm");
            }
        }
        if (buf.indexOf("ss") == -1) {
            final int pos = buf.indexOf("s");
            if (pos != -1) {