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@@ -1,3 +1,159 @@
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というかJava 自体 次の元号は対応してないんだからハードコーディングでよくない？
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可変性を高めるならプロパティファイルで設定して
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可変性を高めるならプロパティファイルで設定して
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# 追記
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プログラム
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```java
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import java.text.SimpleDateFormat;
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import java.time.LocalDate;
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import java.time.format.DateTimeFormatter;
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import java.util.Date;
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import java.util.Locale;
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import java.util.Objects;
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import java.util.ResourceBundle;
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public class GengoValid {
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ResourceBundle bundle = ResourceBundle.getBundle("calendar");
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DateTimeFormatter formatter = DateTimeFormatter.ofPattern("GGGGGy");
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SimpleDateFormat format = new SimpleDateFormat("Gy", new Locale("ja", "JP", "JP"));
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SimpleDateFormat format2 = new SimpleDateFormat("YYYY-MM-dd");
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{
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format.setLenient(false);
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format2.setLenient(false);
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}
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public boolean check(String test) {
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System.out.println(format.format(new Date()));
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try {
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test = test.toUpperCase();
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String g = (test.charAt(0) + "").toUpperCase();
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Integer y = Integer.valueOf(test.substring(1));
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String start = bundle.getString("calendars." + g + ".start");
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String end = bundle.getString("calendars." + g + ".end");
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Objects.requireNonNull(start);
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LocalDate max;
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if (end == null || end.length() == 0) {
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max = LocalDate.now();
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} else {
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max = LocalDate.parse(end);
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}
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if (y == 1) {
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// 元年はハードコーディング
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return true;
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}
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LocalDate inp = LocalDate.parse(format2.format(format.parse(test)));
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System.out.println(inp);
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System.out.println(max);
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return inp.isBefore(max) || inp.equals(max);
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} catch (Exception e) {
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return false;
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}
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}
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}
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```
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プロパティファイル
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```properties
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calendars.M.start=1868-01-01
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calendars.M.end =1912-07-29
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calendars.T.start=1912-07-30
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calendars.T.end =1926-12-24
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calendars.S.start=1926-12-25
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calendars.S.end =1989-01-07
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calendars.H.start=1989-01-08
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calendars.H.end =2019-04-30
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calendars.X.start=2019-05-01
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calendars.X.end =
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```
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Test
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```
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import static org.junit.Assert.*;
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import org.junit.Test;
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public class GengoValidTest {
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GengoValid valid = new GengoValid();
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@Test
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public void testM1() {
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assertTrue(valid.check("M1"));
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}
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@Test
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public void testM45() {
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assertTrue(valid.check("M45"));
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}
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@Test
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public void testM46() {
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assertFalse(valid.check("M46"));
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}
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@Test
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public void testT1() {
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assertTrue(valid.check("T1"));
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}
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@Test
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public void testT15() {
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assertTrue(valid.check("T15"));
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}
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@Test
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public void testT16() {
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assertFalse(valid.check("T16"));
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}
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@Test
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public void testS1() {
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assertTrue(valid.check("S1"));
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}
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@Test
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public void testS64() {
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assertTrue(valid.check("S64"));
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}
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@Test
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public void testS65() {
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assertFalse(valid.check("S65"));
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}
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@Test
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public void testH1() {
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assertTrue(valid.check("H1"));
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}
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@Test
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public void testH31() {
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assertTrue(valid.check("H31"));
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}
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@Test
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public void testH32() {
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assertFalse(valid.check("H32"));
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}
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}
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```
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