[BAEL-13505] Move articles out of core-java part 1
This commit is contained in:
Sjmillington
@@ -1,13 +0,0 @@
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package com.baeldung.optional;
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public class Modem {
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private Double price;
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public Modem(Double price) {
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this.price = price;
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}
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public Double getPrice() {
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return price;
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}
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}
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@@ -1,34 +0,0 @@
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package com.baeldung.optional;
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import java.util.Arrays;
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import java.util.List;
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import java.util.Optional;
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import java.util.Random;
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import org.slf4j.Logger;
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import org.slf4j.LoggerFactory;
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public class OrElseAndOrElseGet {
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public static List<String> names = Arrays.asList("John", "Jones", "Kelly", "Cristina", "Raven");
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private static final Logger LOG = LoggerFactory.getLogger(OrElseAndOrElseGet.class);
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public String getRandomName() {
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LOG.info("getRandomName() method - start");
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Random random = new Random();
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int index = random.nextInt(5);
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LOG.info("getRandomName() method - end");
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return names.get(index);
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}
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public String getNameUsingOrElse(String name) {
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return Optional.ofNullable(name)
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.orElse(getRandomName());
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}
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public String getNameUsingOrElseGet(String name) {
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return Optional.ofNullable(name)
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.orElseGet(() -> getRandomName());
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}
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}
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@@ -1,37 +0,0 @@
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package com.baeldung.optional;
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import java.io.IOException;
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import java.util.concurrent.TimeUnit;
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import org.openjdk.jmh.annotations.Benchmark;
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import org.openjdk.jmh.annotations.BenchmarkMode;
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import org.openjdk.jmh.annotations.Fork;
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import org.openjdk.jmh.annotations.Mode;
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import org.openjdk.jmh.annotations.OutputTimeUnit;
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import org.openjdk.jmh.annotations.Scope;
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import org.openjdk.jmh.annotations.State;
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import org.openjdk.jmh.runner.RunnerException;
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@Fork(1)
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@State(Scope.Benchmark)
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@BenchmarkMode(Mode.AverageTime)
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@OutputTimeUnit(TimeUnit.NANOSECONDS)
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public class OrElseAndOrElseGetBenchmarkRunner {
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private OrElseAndOrElseGet orElsevsOrElseGet = new OrElseAndOrElseGet();
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public static void main(String[] args) throws RunnerException, IOException {
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org.openjdk.jmh.Main.main(args);
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}
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@Benchmark
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public String orElseBenchmark() {
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return orElsevsOrElseGet.getNameUsingOrElse("baeldung");
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}
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@Benchmark
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public String orElseGetBenchmark() {
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return orElsevsOrElseGet.getNameUsingOrElseGet("baeldung");
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}
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}
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@@ -1,39 +0,0 @@
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package com.baeldung.optional;
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import java.util.Optional;
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public class Person {
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private String name;
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private int age;
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private String password;
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public Person(String name, int age) {
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this.name = name;
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this.age = age;
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}
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public Optional<String> getName() {
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return Optional.ofNullable(name);
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}
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public void setName(String name) {
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this.name = name;
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}
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public Optional<Integer> getAge() {
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return Optional.ofNullable(age);
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}
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public void setAge(int age) {
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this.age = age;
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}
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public void setPassword(String password) {
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this.password = password;
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}
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public Optional<String> getPassword() {
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return Optional.ofNullable(password);
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}
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}
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@@ -1,9 +0,0 @@
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package com.baeldung.optional;
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public class PersonRepository {
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public String findNameById(String id) {
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return id == null ? null : "Name";
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}
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}
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@@ -1,92 +0,0 @@
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package com.baeldung.java8;
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import java.io.PrintWriter;
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import java.io.StringWriter;
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import java.util.Date;
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import java.util.Scanner;
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import org.junit.Assert;
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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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public class JavaTryWithResourcesLongRunningUnitTest {
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private static final Logger LOG = LoggerFactory.getLogger(JavaTryWithResourcesLongRunningUnitTest.class);
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private static final String TEST_STRING_HELLO_WORLD = "Hello World";
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private Date resource1Date, resource2Date;
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// tests
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/* Example for using Try_with_resources */
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@Test
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public void whenWritingToStringWriter_thenCorrectlyWritten() {
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final StringWriter sw = new StringWriter();
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try (PrintWriter pw = new PrintWriter(sw, true)) {
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pw.print(TEST_STRING_HELLO_WORLD);
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}
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Assert.assertEquals(sw.getBuffer()
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.toString(), TEST_STRING_HELLO_WORLD);
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}
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/* Example for using multiple resources */
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@Test
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public void givenStringToScanner_whenWritingToStringWriter_thenCorrectlyWritten() {
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final StringWriter sw = new StringWriter();
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try (Scanner sc = new Scanner(TEST_STRING_HELLO_WORLD); PrintWriter pw = new PrintWriter(sw, true)) {
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while (sc.hasNext()) {
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pw.print(sc.nextLine());
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}
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}
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Assert.assertEquals(sw.getBuffer()
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.toString(), TEST_STRING_HELLO_WORLD);
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}
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/* Example to show order in which the resources are closed */
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@Test
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public void whenFirstAutoClosableResourceIsinitializedFirst_thenFirstAutoClosableResourceIsReleasedFirst() throws Exception {
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try (AutoCloseableResourcesFirst af = new AutoCloseableResourcesFirst(); AutoCloseableResourcesSecond as = new AutoCloseableResourcesSecond()) {
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af.doSomething();
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as.doSomething();
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}
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Assert.assertTrue(resource1Date.after(resource2Date));
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}
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class AutoCloseableResourcesFirst implements AutoCloseable {
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public AutoCloseableResourcesFirst() {
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LOG.debug("Constructor -> AutoCloseableResources_First");
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}
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public void doSomething() {
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LOG.debug("Something -> AutoCloseableResources_First");
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}
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@Override
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public void close() throws Exception {
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LOG.debug("Closed AutoCloseableResources_First");
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resource1Date = new Date();
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}
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}
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class AutoCloseableResourcesSecond implements AutoCloseable {
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public AutoCloseableResourcesSecond() {
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LOG.debug("Constructor -> AutoCloseableResources_Second");
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}
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public void doSomething() {
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LOG.debug("Something -> AutoCloseableResources_Second");
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}
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@Override
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public void close() throws Exception {
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LOG.debug("Closed AutoCloseableResources_Second");
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resource2Date = new Date();
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Thread.sleep(10000);
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}
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}
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}
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@@ -1,43 +0,0 @@
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package com.baeldung.optional;
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import org.junit.Test;
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import java.util.Optional;
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import static org.junit.jupiter.api.Assertions.assertAll;
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import static org.junit.jupiter.api.Assertions.assertEquals;
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import static org.junit.jupiter.api.Assertions.assertThrows;
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public class PersonRepositoryUnitTest {
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PersonRepository personRepository = new PersonRepository();
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@Test
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public void whenIdIsNull_thenExceptionIsThrown() {
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assertThrows(IllegalArgumentException.class,
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() ->
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Optional
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.ofNullable(personRepository.findNameById(null))
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.orElseThrow(IllegalArgumentException::new));
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}
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@Test
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public void whenIdIsNonNull_thenNoExceptionIsThrown() {
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assertAll(
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() ->
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Optional
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.ofNullable(personRepository.findNameById("id"))
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.orElseThrow(RuntimeException::new));
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}
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@Test
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public void whenIdNonNull_thenReturnsNameUpperCase() {
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String name = Optional
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.ofNullable(personRepository.findNameById("id"))
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.map(String::toUpperCase)
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.orElseThrow(RuntimeException::new);
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assertEquals("NAME", name);
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}
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}
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