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[BAEL-9555] - Created a core-java-modules folder

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This commit is contained in:
amit2103
2019-05-05 17:22:09 +05:30
parent 8b63b0d90a
commit 3bae5e5334
1480 changed files with 25600 additions and 5594 deletions
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7
core-java-modules/core-java-10/README.md Normal file
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### Relevant Articles:
- [Java 10 LocalVariable Type-Inference](http://www.baeldung.com/java-10-local-variable-type-inference)
- [Guide to Java 10](http://www.baeldung.com/java-10-overview)
- [Copy a List to Another List in Java](http://www.baeldung.com/java-copy-list-to-another)
- [Deep Dive Into the New Java JIT Compiler – Graal](https://www.baeldung.com/graal-java-jit-compiler)

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core-java-modules/core-java-10/pom.xml Normal file
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<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<groupId>com.baeldung</groupId>
<artifactId>core-java-10</artifactId>
<version>0.1.0-SNAPSHOT</version>
<name>core-java-10</name>
<packaging>jar</packaging>
<url>http://maven.apache.org</url>
<parent>
<groupId>com.baeldung</groupId>
<artifactId>parent-modules</artifactId>
<version>1.0.0-SNAPSHOT</version>
<relativePath>../../</relativePath>
</parent>
<build>
<plugins>
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-compiler-plugin</artifactId>
<version>${maven-compiler-plugin.version}</version>
<configuration>
<source>${maven.compiler.source.version}</source>
<target>${maven.compiler.target.version}</target>
</configuration>
</plugin>
</plugins>
</build>
<properties>
<maven.compiler.source.version>10</maven.compiler.source.version>
<maven.compiler.target.version>10</maven.compiler.target.version>
</properties>
</project>

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core-java-modules/core-java-10/src/main/java/com/baeldung/App.java Normal file
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package com.baeldung;
/**
* Hello world!
*
*/
public class App
{
public static void main( String[] args )
{
System.out.println( "Hello World!" );
}
}

25
core-java-modules/core-java-10/src/main/java/com/baeldung/graal/CountUppercase.java Normal file
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package com.baeldung.graal;
public class CountUppercase {
static final int ITERATIONS = Math.max(Integer.getInteger("iterations", 1), 1);
public static void main(String[] args) {
String sentence = String.join(" ", args);
for (int iter = 0; iter < ITERATIONS; iter++) {
if (ITERATIONS != 1) System.out.println("-- iteration " + (iter + 1) + " --");
long total = 0, start = System.currentTimeMillis(), last = start;
for (int i = 1; i < 10_000_000; i++) {
total += sentence
.chars()
.filter(Character::isUpperCase)
.count();
if (i % 1_000_000 == 0) {
long now = System.currentTimeMillis();
System.out.printf("%d (%d ms)%n", i / 1_000_000, now - last);
last = now;
}
}
System.out.printf("total: %d (%d ms)%n", total, System.currentTimeMillis() - start);
}
}
}

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core-java-modules/core-java-10/src/main/resources/logback.xml Normal file
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<?xml version="1.0" encoding="UTF-8"?>
<configuration>
<appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
<encoder>
<pattern>%d{HH:mm:ss.SSS} [%thread] %-5level %logger{36} - %msg%n
</pattern>
</encoder>
</appender>
<root level="INFO">
<appender-ref ref="STDOUT" />
</root>
</configuration>

38
core-java-modules/core-java-10/src/test/java/com/baeldung/AppTest.java Normal file
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package com.baeldung;
import junit.framework.Test;
import junit.framework.TestCase;
import junit.framework.TestSuite;
/**
* Unit test for simple App.
*/
public class AppTest
extends TestCase
{
/**
* Create the test case
*
* @param testName name of the test case
*/
public AppTest( String testName )
{
super( testName );
}
/**
* @return the suite of tests being tested
*/
public static Test suite()
{
return new TestSuite( AppTest.class );
}
/**
* Rigourous Test :-)
*/
public void testApp()
{
assertTrue( true );
}
}

61
core-java-modules/core-java-10/src/test/java/com/baeldung/java10/Java10FeaturesUnitTest.java Normal file
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package com.baeldung.java10;
import static org.hamcrest.CoreMatchers.is;
import static org.junit.Assert.assertFalse;
import static org.junit.Assert.assertTrue;
import java.util.ArrayList;
import java.util.List;
import java.util.stream.Collectors;
import org.junit.Before;
import org.junit.Test;
public class Java10FeaturesUnitTest {
private List<Integer> someIntList;
@Before
public void setup() {
someIntList = new ArrayList<>();
someIntList.add(1);
someIntList.add(2);
someIntList.add(3);
}
@Test
public void whenVarInitWithString_thenGetStringTypeVar() {
var message = "Hello, Java 10";
assertTrue(message instanceof String);
}
@Test
public void whenVarInitWithAnonymous_thenGetAnonymousType() {
var obj = new Object() {};
assertFalse(obj.getClass().equals(Object.class));
}
@Test(expected = UnsupportedOperationException.class)
public void whenModifyCopyOfList_thenThrowsException() {
List<Integer> copyList = List.copyOf(someIntList);
copyList.add(4);
}
@Test(expected = UnsupportedOperationException.class)
public void whenModifyToUnmodifiableList_thenThrowsException() {
List<Integer> evenList = someIntList.stream()
.filter(i -> i % 2 == 0)
.collect(Collectors.toUnmodifiableList());
evenList.add(4);
}
@Test
public void whenListContainsInteger_OrElseThrowReturnsInteger() {
Integer firstEven = someIntList.stream()
.filter(i -> i % 2 == 0)
.findFirst()
.orElseThrow();
is(firstEven).equals(Integer.valueOf(2));
}
}

14
core-java-modules/core-java-10/src/test/java/com/baeldung/java10/list/CopyListServiceUnitTest.java Normal file
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package com.baeldung.java10.list;
import org.junit.Test;
import java.util.Arrays;
import java.util.List;
public class CopyListServiceUnitTest {
@Test(expected = UnsupportedOperationException.class)
public void whenModifyCopyOfList_thenThrowsException() {
List<Integer> copyList = List.copyOf(Arrays.asList(1, 2, 3, 4));
}
}