JAVA-22238 | moved articles into correct locations. (#14297)
This commit is contained in:
Gaetano Piazzolla
committed by
GitHub
GitHub
parent
b4a8dfbbff
commit
171fdc7b7e
@@ -1,16 +1,16 @@
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## Java Strings
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This module contains articles about strings in Java.
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This is a generic module contains articles about strings in Java.
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Listed here there are only those articles that does not fit into other core-java-string-* modules as:
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- [core-java-string-operations](../core-java-string-operations)
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- [core-java-string-apis](../core-java-string-apis)
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- [core-java-string-conversion](../core-java-string-conversions)
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- [core-java-string-algorithms](../core-java-string-algorithms)
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### Relevant Articles:
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- [Use char[] Array Over a String for Manipulating Passwords in Java?](https://www.baeldung.com/java-storing-passwords)
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- [Compact Strings in Java 9](https://www.baeldung.com/java-9-compact-string)
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- [String Not Empty Test Assertions in Java](https://www.baeldung.com/java-assert-string-not-empty)
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- [String Performance Hints](https://www.baeldung.com/java-string-performance)
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- [Java Localization – Formatting Messages](https://www.baeldung.com/java-localization-messages-formatting)
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- [Java – Generate Random String](https://www.baeldung.com/java-random-string)
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- [Java String Interview Questions and Answers](https://www.baeldung.com/java-string-interview-questions)
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- [Java Multi-line String](https://www.baeldung.com/java-multiline-string)
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- [Guide to Java String Pool](https://www.baeldung.com/java-string-pool)
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- [Fixing “constant string too long” Build Error](https://www.baeldung.com/java-constant-string-too-long-error)
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- [Reuse StringBuilder for Efficiency](https://www.baeldung.com/java-reuse-stringbuilder-for-efficiency)
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@@ -29,11 +29,6 @@
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<artifactId>jmh-generator-annprocess</artifactId>
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<version>${jmh-generator.version}</version>
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</dependency>
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<dependency>
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<groupId>com.ibm.icu</groupId>
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<artifactId>icu4j</artifactId>
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<version>${icu4j.version}</version>
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</dependency>
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</dependencies>
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<build>
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@@ -47,7 +42,6 @@
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</build>
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<properties>
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<icu4j.version>61.1</icu4j.version>
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<maven.compiler.release>15</maven.compiler.release>
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</properties>
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@@ -1,25 +0,0 @@
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package com.baeldung.java9.compactstring;
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import java.util.List;
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import java.util.stream.IntStream;
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import static java.util.stream.Collectors.toList;
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public class CompactStringDemo {
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public static void main(String[] args) {
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long startTime = System.currentTimeMillis();
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List strings = IntStream.rangeClosed(1, 10_000_000)
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.mapToObj(Integer::toString).collect(toList());
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long totalTime = System.currentTimeMillis() - startTime;
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System.out.println("Generated " + strings.size() + " strings in "
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+ totalTime + " ms.");
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startTime = System.currentTimeMillis();
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String appended = (String) strings.stream().limit(100_000)
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.reduce("", (left, right) -> left.toString() + right.toString());
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totalTime = System.currentTimeMillis() - startTime;
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System.out.println("Created string of length " + appended.length()
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+ " in " + totalTime + " ms.");
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}
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}
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@@ -1,21 +0,0 @@
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package com.baeldung.localization;
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import java.text.ParseException;
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import java.util.Arrays;
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import java.util.List;
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import java.util.Locale;
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public class App {
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/**
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* Runs all available formatter
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* @throws ParseException
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*/
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public static void main(String[] args) {
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List<Locale> locales = Arrays.asList(new Locale[] { Locale.UK, Locale.ITALY, Locale.FRANCE, Locale.forLanguageTag("pl-PL") });
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Localization.run(locales);
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JavaSEFormat.run(locales);
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ICUFormat.run(locales);
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}
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}
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@@ -1,29 +0,0 @@
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package com.baeldung.localization;
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import com.ibm.icu.text.MessageFormat;
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import java.util.List;
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import java.util.Locale;
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import java.util.ResourceBundle;
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public class ICUFormat {
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public static String getLabel(Locale locale, Object[] data) {
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ResourceBundle bundle = ResourceBundle.getBundle("formats", locale);
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String format = bundle.getString("label-icu");
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MessageFormat formatter = new MessageFormat(format, locale);
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return formatter.format(data);
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}
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public static void run(List<Locale> locales) {
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System.out.println("ICU formatter");
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locales.forEach(locale -> System.out.println(getLabel(locale, new Object[] { "Alice", "female", 0 })));
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locales.forEach(locale -> System.out.println(getLabel(locale, new Object[] { "Alice", "female", 1 })));
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locales.forEach(locale -> System.out.println(getLabel(locale, new Object[] { "Alice", "female", 2 })));
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locales.forEach(locale -> System.out.println(getLabel(locale, new Object[] { "Alice", "female", 3 })));
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locales.forEach(locale -> System.out.println(getLabel(locale, new Object[] { "Bob", "male", 0 })));
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locales.forEach(locale -> System.out.println(getLabel(locale, new Object[] { "Bob", "male", 1 })));
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locales.forEach(locale -> System.out.println(getLabel(locale, new Object[] { "Bob", "male", 2 })));
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locales.forEach(locale -> System.out.println(getLabel(locale, new Object[] { "Bob", "male", 3 })));
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}
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}
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@@ -1,24 +0,0 @@
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package com.baeldung.localization;
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import java.text.MessageFormat;
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import java.util.Date;
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import java.util.List;
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import java.util.Locale;
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import java.util.ResourceBundle;
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public class JavaSEFormat {
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public static String getLabel(Locale locale, Object[] data) {
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ResourceBundle bundle = ResourceBundle.getBundle("formats", locale);
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final String pattern = bundle.getString("label");
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final MessageFormat formatter = new MessageFormat(pattern, locale);
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return formatter.format(data);
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}
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public static void run(List<Locale> locales) {
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System.out.println("Java formatter");
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final Date date = new Date(System.currentTimeMillis());
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locales.forEach(locale -> System.out.println(getLabel(locale, new Object[] { date, "Alice", 0 })));
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locales.forEach(locale -> System.out.println(getLabel(locale, new Object[] { date, "Alice", 2 })));
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}
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}
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@@ -1,18 +0,0 @@
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package com.baeldung.localization;
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import java.util.List;
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import java.util.Locale;
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import java.util.ResourceBundle;
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public class Localization {
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public static String getLabel(Locale locale) {
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final ResourceBundle bundle = ResourceBundle.getBundle("messages", locale);
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return bundle.getString("label");
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}
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public static void run(List<Locale> locales) {
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locales.forEach(locale -> System.out.println(getLabel(locale)));
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}
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}
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File diff suppressed because one or more lines are too long
@@ -1,2 +0,0 @@
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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}.
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label-icu={0} has sent you {2, plural, =0 {no messages} =1 {a message} other {{2, number, integer} messages}}.
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@@ -1,2 +0,0 @@
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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}.
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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}}.
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@@ -1,2 +0,0 @@
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label={0, date, short} {1} ti ha inviato {2, choice, 0#nessun messagio|1#un messaggio|2#due messaggi|2<{2, number, integer} messaggi}.
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label-icu={0} {2, plural, =0 {non } other {}}ti ha inviato {2, plural, =0 {nessun messaggio} =1 {un messaggio} other {{2, number, integer} messaggi}}.
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@@ -1,2 +0,0 @@
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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}.
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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}}.
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@@ -1 +0,0 @@
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label=Alice has sent you a message.
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@@ -1 +0,0 @@
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label=Alice vous a envoy\u00e9 un message.
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@@ -1 +0,0 @@
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label=Alice ti ha inviato un messaggio.
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@@ -1 +0,0 @@
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label=Alice wys\u0142a\u0142a ci wiadomo\u015B\u0107.
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@@ -1,72 +0,0 @@
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package com.baeldung.localization;
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import org.junit.Test;
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import java.util.Locale;
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import static org.junit.Assert.assertEquals;
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public class ICUFormatUnitTest {
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@Test
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public void givenInUK_whenAliceSendsNothing_thenCorrectMessage() {
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assertEquals("Alice has sent you no messages.", ICUFormat.getLabel(Locale.UK, new Object[] { "Alice", "female", 0 }));
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}
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@Test
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public void givenInUK_whenAliceSendsOneMessage_thenCorrectMessage() {
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assertEquals("Alice has sent you a message.", ICUFormat.getLabel(Locale.UK, new Object[] { "Alice", "female", 1 }));
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}
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@Test
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public void givenInUK_whenBobSendsSixMessages_thenCorrectMessage() {
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assertEquals("Bob has sent you 6 messages.", ICUFormat.getLabel(Locale.UK, new Object[] { "Bob", "male", 6 }));
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}
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@Test
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public void givenInItaly_whenAliceSendsNothing_thenCorrectMessage() {
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assertEquals("Alice non ti ha inviato nessun messaggio.", ICUFormat.getLabel(Locale.ITALY, new Object[] { "Alice", "female", 0 }));
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}
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@Test
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public void givenInItaly_whenAliceSendsOneMessage_thenCorrectMessage() {
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assertEquals("Alice ti ha inviato un messaggio.", ICUFormat.getLabel(Locale.ITALY, new Object[] { "Alice", "female", 1 }));
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}
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@Test
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public void givenInItaly_whenBobSendsSixMessages_thenCorrectMessage() {
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assertEquals("Bob ti ha inviato 6 messaggi.", ICUFormat.getLabel(Locale.ITALY, new Object[] { "Bob", "male", 6 }));
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}
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@Test
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public void givenInFrance_whenAliceSendsNothing_thenCorrectMessage() {
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assertEquals("Alice ne vous a envoyé aucun message.", ICUFormat.getLabel(Locale.FRANCE, new Object[] { "Alice", "female", 0 }));
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}
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@Test
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public void givenInFrance_whenAliceSendsOneMessage_thenCorrectMessage() {
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assertEquals("Alice vous a envoyé un message.", ICUFormat.getLabel(Locale.FRANCE, new Object[] { "Alice", "female", 1 }));
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}
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@Test
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public void givenInFrance_whenBobSendsSixMessages_thenCorrectMessage() {
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assertEquals("Bob vous a envoyé 6 messages.", ICUFormat.getLabel(Locale.FRANCE, new Object[] { "Bob", "male", 6 }));
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}
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@Test
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public void givenInPoland_whenAliceSendsNothing_thenCorrectMessage() {
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assertEquals("Alice nie wysłała ci żadnej wiadomości.", ICUFormat.getLabel(Locale.forLanguageTag("pl-PL"), new Object[] { "Alice", "female", 0 }));
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}
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@Test
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public void givenInPoland_whenAliceSendsOneMessage_thenCorrectMessage() {
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assertEquals("Alice wysłała ci wiadomość.", ICUFormat.getLabel(Locale.forLanguageTag("pl-PL"), new Object[] { "Alice", "female", 1 }));
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}
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@Test
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public void givenInPoland_whenBobSendsSixMessages_thenCorrectMessage() {
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assertEquals("Bob wysłał ci 6 wiadomości.", ICUFormat.getLabel(Locale.forLanguageTag("pl-PL"), new Object[] { "Bob", "male", 6 }));
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}
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}
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@@ -1,103 +0,0 @@
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package com.baeldung.randomstrings;
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import org.apache.commons.lang3.RandomStringUtils;
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import org.junit.Test;
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import org.slf4j.Logger;
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import org.slf4j.LoggerFactory;
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import java.nio.charset.Charset;
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import java.util.Random;
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public class RandomStringsUnitTest {
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private static final Logger LOG = LoggerFactory.getLogger(RandomStringsUnitTest.class);
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@Test
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public void givenUsingPlainJava_whenGeneratingRandomStringUnbounded_thenCorrect() {
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byte[] array = new byte[7]; // length is bounded by 7
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new Random().nextBytes(array);
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String generatedString = new String(array, Charset.forName("UTF-8"));
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LOG.debug(generatedString);
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}
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@Test
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public void givenUsingPlainJava_whenGeneratingRandomStringBounded_thenCorrect() {
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int leftLimit = 97; // letter 'a'
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int rightLimit = 122; // letter 'z'
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int targetStringLength = 10;
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Random random = new Random();
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StringBuilder buffer = new StringBuilder(targetStringLength);
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for (int i = 0; i < targetStringLength; i++) {
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int randomLimitedInt = leftLimit + (int) (random.nextFloat() * (rightLimit - leftLimit + 1));
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buffer.append((char) randomLimitedInt);
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}
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String generatedString = buffer.toString();
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LOG.debug(generatedString);
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}
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@Test
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public void givenUsingJava8_whenGeneratingRandomAlphabeticString_thenCorrect() {
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int leftLimit = 97; // letter 'a'
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int rightLimit = 122; // letter 'z'
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int targetStringLength = 10;
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Random random = new Random();
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String generatedString = random.ints(leftLimit, rightLimit + 1)
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.limit(targetStringLength)
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.collect(StringBuilder::new, StringBuilder::appendCodePoint, StringBuilder::append)
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.toString();
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LOG.debug(generatedString);
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}
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@Test
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public void givenUsingJava8_whenGeneratingRandomAlphanumericString_thenCorrect() {
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int leftLimit = 48; // numeral '0'
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int rightLimit = 122; // letter 'z'
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int targetStringLength = 10;
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Random random = new Random();
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String generatedString = random.ints(leftLimit, rightLimit + 1)
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.filter(i -> (i <= 57 || i >= 65) && (i <= 90 || i >= 97))
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.limit(targetStringLength)
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.collect(StringBuilder::new, StringBuilder::appendCodePoint, StringBuilder::append)
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.toString();
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LOG.debug(generatedString);
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}
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@Test
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public void givenUsingApache_whenGeneratingRandomString_thenCorrect() {
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String generatedString = RandomStringUtils.random(10);
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LOG.debug(generatedString);
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}
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@Test
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public void givenUsingApache_whenGeneratingRandomAlphabeticString_thenCorrect() {
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String generatedString = RandomStringUtils.randomAlphabetic(10);
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LOG.debug(generatedString);
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}
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@Test
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public void givenUsingApache_whenGeneratingRandomAlphanumericString_thenCorrect() {
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String generatedString = RandomStringUtils.randomAlphanumeric(10);
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LOG.debug(generatedString);
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}
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@Test
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public void givenUsingApache_whenGeneratingRandomStringBounded_thenCorrect() {
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int length = 10;
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boolean useLetters = true;
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boolean useNumbers = false;
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String generatedString = RandomStringUtils.random(length, useLetters, useNumbers);
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LOG.debug(generatedString);
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}
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}
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@@ -1,44 +0,0 @@
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package com.baeldung.stringpool;
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import static org.assertj.core.api.Assertions.assertThat;
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import org.junit.Test;
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public class StringPoolUnitTest {
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@Test
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public void whenCreatingConstantStrings_thenTheirAddressesAreEqual() {
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String constantString1 = "Baeldung";
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String constantString2 = "Baeldung";
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assertThat(constantString1).isSameAs(constantString2);
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}
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@Test
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public void whenCreatingStringsWithTheNewOperator_thenTheirAddressesAreDifferent() {
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String newString1 = new String("Baeldung");
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String newString2 = new String("Baeldung");
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assertThat(newString1).isNotSameAs(newString2);
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}
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@Test
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public void whenComparingConstantAndNewStrings_thenTheirAddressesAreDifferent() {
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String constantString = "Baeldung";
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String newString = new String("Baeldung");
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assertThat(constantString).isNotSameAs(newString);
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}
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@Test
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public void whenInterningAStringWithIdenticalValueToAnother_thenTheirAddressesAreEqual() {
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String constantString = "interned Baeldung";
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String newString = new String("interned Baeldung");
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assertThat(constantString).isNotSameAs(newString);
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String internedString = newString.intern();
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assertThat(constantString).isSameAs(internedString);
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}
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}
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File diff suppressed because one or more lines are too long
Reference in New Issue
Block a user