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JAVA-22238 | moved articles into correct locations. (#14297)

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This commit is contained in:
Gaetano Piazzolla
2023-06-24 20:11:14 +02:00
committed by GitHub
parent b4a8dfbbff
commit 171fdc7b7e
23 changed files with 121 additions and 116 deletions
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2
core-java-modules/core-java-string-apis-2/README.md
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@@ -5,3 +5,5 @@ This module contains articles about string APIs.
### Relevant Articles:
- [Retain Only Digits and Decimal Separator in String](https://www.baeldung.com/java-string-retain-digits-decimal)
- [Difference Between null and Empty String in Java](https://www.baeldung.com/java-string-null-vs-empty)
- [Guide to Java String Pool](https://www.baeldung.com/java-string-pool)
- [Java Localization – Formatting Messages](https://www.baeldung.com/java-localization-messages-formatting)

6
core-java-modules/core-java-string-apis-2/pom.xml
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@@ -24,6 +24,11 @@
<artifactId>commons-lang3</artifactId>
<version>${commons.lang3.version}</version>
</dependency>
<dependency>
<groupId>com.ibm.icu</groupId>
<artifactId>icu4j</artifactId>
<version>${icu4j.version}</version>
</dependency>
</dependencies>
<build>
@@ -39,6 +44,7 @@
<properties>
<commons.lang3.version>3.12.0</commons.lang3.version>
<guava.version>31.1-jre</guava.version>
<icu4j.version>61.1</icu4j.version>
</properties>
</project>

21
core-java-modules/core-java-string-apis-2/src/main/java/com/baeldung/localization/App.java Normal file
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@@ -0,0 +1,21 @@
package com.baeldung.localization;
import java.text.ParseException;
import java.util.Arrays;
import java.util.List;
import java.util.Locale;
public class App {
/**
* Runs all available formatter
* @throws ParseException
*/
public static void main(String[] args) {
List<Locale> locales = Arrays.asList(new Locale[] { Locale.UK, Locale.ITALY, Locale.FRANCE, Locale.forLanguageTag("pl-PL") });
Localization.run(locales);
JavaSEFormat.run(locales);
ICUFormat.run(locales);
}
}

29
core-java-modules/core-java-string-apis-2/src/main/java/com/baeldung/localization/ICUFormat.java Normal file
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@@ -0,0 +1,29 @@
package com.baeldung.localization;
import com.ibm.icu.text.MessageFormat;
import java.util.List;
import java.util.Locale;
import java.util.ResourceBundle;
public class ICUFormat {
public static String getLabel(Locale locale, Object[] data) {
ResourceBundle bundle = ResourceBundle.getBundle("formats", locale);
String format = bundle.getString("label-icu");
MessageFormat formatter = new MessageFormat(format, locale);
return formatter.format(data);
}
public static void run(List<Locale> locales) {
System.out.println("ICU formatter");
locales.forEach(locale -> System.out.println(getLabel(locale, new Object[] { "Alice", "female", 0 })));
locales.forEach(locale -> System.out.println(getLabel(locale, new Object[] { "Alice", "female", 1 })));
locales.forEach(locale -> System.out.println(getLabel(locale, new Object[] { "Alice", "female", 2 })));
locales.forEach(locale -> System.out.println(getLabel(locale, new Object[] { "Alice", "female", 3 })));
locales.forEach(locale -> System.out.println(getLabel(locale, new Object[] { "Bob", "male", 0 })));
locales.forEach(locale -> System.out.println(getLabel(locale, new Object[] { "Bob", "male", 1 })));
locales.forEach(locale -> System.out.println(getLabel(locale, new Object[] { "Bob", "male", 2 })));
locales.forEach(locale -> System.out.println(getLabel(locale, new Object[] { "Bob", "male", 3 })));
}
}

24
core-java-modules/core-java-string-apis-2/src/main/java/com/baeldung/localization/JavaSEFormat.java Normal file
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@@ -0,0 +1,24 @@
package com.baeldung.localization;
import java.text.MessageFormat;
import java.util.Date;
import java.util.List;
import java.util.Locale;
import java.util.ResourceBundle;
public class JavaSEFormat {
public static String getLabel(Locale locale, Object[] data) {
ResourceBundle bundle = ResourceBundle.getBundle("formats", locale);
final String pattern = bundle.getString("label");
final MessageFormat formatter = new MessageFormat(pattern, locale);
return formatter.format(data);
}
public static void run(List<Locale> locales) {
System.out.println("Java formatter");
final Date date = new Date(System.currentTimeMillis());
locales.forEach(locale -> System.out.println(getLabel(locale, new Object[] { date, "Alice", 0 })));
locales.forEach(locale -> System.out.println(getLabel(locale, new Object[] { date, "Alice", 2 })));
}
}

18
core-java-modules/core-java-string-apis-2/src/main/java/com/baeldung/localization/Localization.java Normal file
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@@ -0,0 +1,18 @@
package com.baeldung.localization;
import java.util.List;
import java.util.Locale;
import java.util.ResourceBundle;
public class Localization {
public static String getLabel(Locale locale) {
final ResourceBundle bundle = ResourceBundle.getBundle("messages", locale);
return bundle.getString("label");
}
public static void run(List<Locale> locales) {
locales.forEach(locale -> System.out.println(getLabel(locale)));
}
}

2
core-java-modules/core-java-string-apis-2/src/main/resources/formats_en.properties Normal file
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@@ -0,0 +1,2 @@
label=On {0, date, short} {1} has sent you {2, choice, 0#no messages|1#a message|2#two messages|2<{2,number,integer} messages}.
label-icu={0} has sent you {2, plural, =0 {no messages} =1 {a message} other {{2, number, integer} messages}}.

2
core-java-modules/core-java-string-apis-2/src/main/resources/formats_fr.properties Normal file
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@@ -0,0 +1,2 @@
label={0, date, short}, {1}{2, choice, 0# ne|0<} vous a envoy\u00e9 {2, choice, 0#aucun message|1#un message|2#deux messages|2<{2,number,integer} messages}.
label-icu={0} {2, plural, =0 {ne } other {}}vous a envoy\u00e9 {2, plural, =0 {aucun message} =1 {un message} other {{2, number, integer} messages}}.

2
core-java-modules/core-java-string-apis-2/src/main/resources/formats_it.properties Normal file
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@@ -0,0 +1,2 @@
label={0, date, short} {1} ti ha inviato {2, choice, 0#nessun messagio|1#un messaggio|2#due messaggi|2<{2, number, integer} messaggi}.
label-icu={0} {2, plural, =0 {non } other {}}ti ha inviato {2, plural, =0 {nessun messaggio} =1 {un messaggio} other {{2, number, integer} messaggi}}.

2
core-java-modules/core-java-string-apis-2/src/main/resources/formats_pl.properties Normal file
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@@ -0,0 +1,2 @@
label=W {0, date, short} {1}{2, choice, 0# nie|0<} wys\u0142a\u0142a ci {2, choice, 0#\u017Cadnych wiadomo\u015Bci|1#wiadomo\u015B\u0107|2#dwie wiadomo\u015Bci|2<{2, number, integer} wiadomo\u015Bci}.
label-icu={0} {2, plural, =0 {nie } other {}}{1, select, male {wys\u0142a\u0142} female {wys\u0142a\u0142a} other {wys\u0142a\u0142o}} ci {2, plural, =0 {\u017Cadnej wiadomo\u015Bci} =1 {wiadomo\u015B\u0107} other {{2, number, integer} wiadomo\u015Bci}}.

1
core-java-modules/core-java-string-apis-2/src/main/resources/messages_en.properties Normal file
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@@ -0,0 +1 @@
label=Alice has sent you a message.

1
core-java-modules/core-java-string-apis-2/src/main/resources/messages_fr.properties Normal file
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@@ -0,0 +1 @@
label=Alice vous a envoy\u00e9 un message.

1
core-java-modules/core-java-string-apis-2/src/main/resources/messages_it.properties Normal file
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@@ -0,0 +1 @@
label=Alice ti ha inviato un messaggio.

1
core-java-modules/core-java-string-apis-2/src/main/resources/messages_pl.properties Normal file
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@@ -0,0 +1 @@
label=Alice wys\u0142a\u0142a ci wiadomo\u015B\u0107.

72
core-java-modules/core-java-string-apis-2/src/test/java/com/baeldung/localization/ICUFormatUnitTest.java Normal file
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@@ -0,0 +1,72 @@
package com.baeldung.localization;
import org.junit.Test;
import java.util.Locale;
import static org.junit.Assert.assertEquals;
public class ICUFormatUnitTest {
@Test
public void givenInUK_whenAliceSendsNothing_thenCorrectMessage() {
assertEquals("Alice has sent you no messages.", ICUFormat.getLabel(Locale.UK, new Object[] { "Alice", "female", 0 }));
}
@Test
public void givenInUK_whenAliceSendsOneMessage_thenCorrectMessage() {
assertEquals("Alice has sent you a message.", ICUFormat.getLabel(Locale.UK, new Object[] { "Alice", "female", 1 }));
}
@Test
public void givenInUK_whenBobSendsSixMessages_thenCorrectMessage() {
assertEquals("Bob has sent you 6 messages.", ICUFormat.getLabel(Locale.UK, new Object[] { "Bob", "male", 6 }));
}
@Test
public void givenInItaly_whenAliceSendsNothing_thenCorrectMessage() {
assertEquals("Alice non ti ha inviato nessun messaggio.", ICUFormat.getLabel(Locale.ITALY, new Object[] { "Alice", "female", 0 }));
}
@Test
public void givenInItaly_whenAliceSendsOneMessage_thenCorrectMessage() {
assertEquals("Alice ti ha inviato un messaggio.", ICUFormat.getLabel(Locale.ITALY, new Object[] { "Alice", "female", 1 }));
}
@Test
public void givenInItaly_whenBobSendsSixMessages_thenCorrectMessage() {
assertEquals("Bob ti ha inviato 6 messaggi.", ICUFormat.getLabel(Locale.ITALY, new Object[] { "Bob", "male", 6 }));
}
@Test
public void givenInFrance_whenAliceSendsNothing_thenCorrectMessage() {
assertEquals("Alice ne vous a envoyé aucun message.", ICUFormat.getLabel(Locale.FRANCE, new Object[] { "Alice", "female", 0 }));
}
@Test
public void givenInFrance_whenAliceSendsOneMessage_thenCorrectMessage() {
assertEquals("Alice vous a envoyé un message.", ICUFormat.getLabel(Locale.FRANCE, new Object[] { "Alice", "female", 1 }));
}
@Test
public void givenInFrance_whenBobSendsSixMessages_thenCorrectMessage() {
assertEquals("Bob vous a envoyé 6 messages.", ICUFormat.getLabel(Locale.FRANCE, new Object[] { "Bob", "male", 6 }));
}
@Test
public void givenInPoland_whenAliceSendsNothing_thenCorrectMessage() {
assertEquals("Alice nie wysłała ci żadnej wiadomości.", ICUFormat.getLabel(Locale.forLanguageTag("pl-PL"), new Object[] { "Alice", "female", 0 }));
}
@Test
public void givenInPoland_whenAliceSendsOneMessage_thenCorrectMessage() {
assertEquals("Alice wysłała ci wiadomość.", ICUFormat.getLabel(Locale.forLanguageTag("pl-PL"), new Object[] { "Alice", "female", 1 }));
}
@Test
public void givenInPoland_whenBobSendsSixMessages_thenCorrectMessage() {
assertEquals("Bob wysłał ci 6 wiadomości.", ICUFormat.getLabel(Locale.forLanguageTag("pl-PL"), new Object[] { "Bob", "male", 6 }));
}
}

44
core-java-modules/core-java-string-apis-2/src/test/java/com/baeldung/stringpool/StringPoolUnitTest.java Normal file
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@@ -0,0 +1,44 @@
package com.baeldung.stringpool;
import static org.assertj.core.api.Assertions.assertThat;
import org.junit.Test;
public class StringPoolUnitTest {
@Test
public void whenCreatingConstantStrings_thenTheirAddressesAreEqual() {
String constantString1 = "Baeldung";
String constantString2 = "Baeldung";
assertThat(constantString1).isSameAs(constantString2);
}
@Test
public void whenCreatingStringsWithTheNewOperator_thenTheirAddressesAreDifferent() {
String newString1 = new String("Baeldung");
String newString2 = new String("Baeldung");
assertThat(newString1).isNotSameAs(newString2);
}
@Test
public void whenComparingConstantAndNewStrings_thenTheirAddressesAreDifferent() {
String constantString = "Baeldung";
String newString = new String("Baeldung");
assertThat(constantString).isNotSameAs(newString);
}
@Test
public void whenInterningAStringWithIdenticalValueToAnother_thenTheirAddressesAreEqual() {
String constantString = "interned Baeldung";
String newString = new String("interned Baeldung");
assertThat(constantString).isNotSameAs(newString);
String internedString = newString.intern();
assertThat(constantString).isSameAs(internedString);
}
}