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BAEL-6846 - Convert from float to BigDecimal

This commit is contained in:
mcasari 2023-09-21 20:28:15 +02:00
parent 4ce8b0e70a
commit a7940d9658
10 changed files with 18 additions and 162 deletions
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7
convert-float-to-bigdecimal/README.md
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@ -1,7 +0,0 @@
## Shallow vs Deep Copy
This module contains an article about converting float to BigDecimal in Java
### Relevant articles:
- [Converting from Float to BigDecimal in Java](https://drafts.baeldung.com/?p=175240&preview=true)

16
convert-float-to-bigdecimal/pom.xml
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@ -1,16 +0,0 @@
<?xml version="1.0" encoding="UTF-8"?>
<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>
<artifactId>convert-float-to-bigdecimal</artifactId>
<name>convert-float-to-bigdecimal</name>
<packaging>jar</packaging>
<parent>
<groupId>com.baeldung</groupId>
<artifactId>parent-modules</artifactId>
<version>1.0.0-SNAPSHOT</version>
</parent>
</project>

14
convert-float-to-bigdecimal/src/main/resources/logback.xml
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@ -1,14 +0,0 @@
<?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>

24
convert-float-to-bigdecimal/src/test/java/com/baeldung/convertfloattobigdecimal/ConvertFloatToBigDecimalUnitTest.java → core-java-modules/core-java-numbers-conversions/src/test/java/com/baeldung/floattobigdecimal/FloatToBigDecimalUnitTest.java
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@ -1,4 +1,4 @@
package com.baeldung.convertfloattobigdecimal;
package com.baeldung.floattobigdecimal;
import static org.junit.jupiter.api.Assertions.assertEquals;
import static org.junit.jupiter.api.Assertions.assertNotEquals;
@ -7,7 +7,7 @@ import java.math.BigDecimal;
import org.junit.jupiter.api.Test;
class ConvertFloatToBigDecimalUnitTest {
class FloatToBigDecimalUnitTest {
@Test
public void whenFloatComparedWithDifferentValues_thenCouldMatch() {
@ -16,12 +16,16 @@ class ConvertFloatToBigDecimalUnitTest {
}
@Test
public void whenCreatedFromFloat_thenCouldNotMatch() {
public void whenCreatedFromCertainFloatValues_thenMatches() {
float floatToConvert = 0.5f;
BigDecimal bdFromFloat = new BigDecimal(floatToConvert);
assertEquals("0.5", bdFromFloat.toString());
floatToConvert = 1.1f;
bdFromFloat = new BigDecimal(floatToConvert);
}
@Test
public void whenCreatedFromCertainFloatValues_thenDoesNotMatch() {
float floatToConvert = 1.1f;
BigDecimal bdFromFloat = new BigDecimal(floatToConvert);
assertNotEquals("1.1", bdFromFloat.toString());
}
@ -39,10 +43,18 @@ class ConvertFloatToBigDecimalUnitTest {
assertNotEquals("1.1", bdByValueOf.toString());
}
@Test
public void whenFloatCastToDouble_thenGotADifferentNumber() {
float floatToConvert = 1.1f;
double doubleCast = floatToConvert;
assertEquals("1.100000023841858", Double.toString(doubleCast));
}
@Test
public void whenCreatedByValueOfAndIsDouble_thenMatches() {
double doubleToConvert = 1.1d;
BigDecimal bdByValueOf = BigDecimal.valueOf(doubleToConvert);
assertEquals("1.1", bdByValueOf.toString());
}
}
}

7
shallow-deep-copy/README.md
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@ -1,7 +0,0 @@
## Shallow vs Deep Copy
This module contains an article about shallow vs deep copy of Java objects
### Relevant articles:
- [Creating a deep vs shallow copy of an object in Java](https://drafts.baeldung.com/?p=172294&preview=true)

16
shallow-deep-copy/pom.xml
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@ -1,16 +0,0 @@
<?xml version="1.0" encoding="UTF-8"?>
<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>
<artifactId>shallow-deep-copy</artifactId>
<name>shallow-deep-copy</name>
<packaging>jar</packaging>
<parent>
<groupId>com.baeldung</groupId>
<artifactId>parent-modules</artifactId>
<version>1.0.0-SNAPSHOT</version>
</parent>
</project>

23
shallow-deep-copy/src/main/java/com/baeldung/shallowdeepcopy/Dependency.java
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@ -1,23 +0,0 @@
package com.baeldung.shallowdeepcopy;
public class Dependency implements Cloneable {
private int value = 13;
public Dependency(int value) {
super();
this.value = value;
}
public int getValue() {
return value;
}
public void setValue(int value) {
this.value = value;
}
@Override
protected Object clone() throws CloneNotSupportedException {
return super.clone();
}
}

31
shallow-deep-copy/src/main/java/com/baeldung/shallowdeepcopy/Main.java
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@ -1,31 +0,0 @@
package com.baeldung.shallowdeepcopy;
public class Main implements Cloneable {
private Dependency dependency;
public Main(Dependency dependency) {
super();
this.dependency = dependency;
}
@Override
public Object clone() throws CloneNotSupportedException {
return super.clone();
}
public Object deepClone() throws CloneNotSupportedException {
Main dependentClone = (Main) super.clone();
Dependency dependencyClone = (Dependency) this.dependency.clone();
dependentClone.setDependency(dependencyClone);
return dependentClone;
}
public Dependency getDependency() {
return dependency;
}
public void setDependency(Dependency dependency) {
this.dependency = dependency;
}
}

14
shallow-deep-copy/src/main/resources/logback.xml
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@ -1,14 +0,0 @@
<?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>

28
shallow-deep-copy/src/test/java/com/baeldung/shallowdeepcopy/ShallowDeepCopyUnitTest.java
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@ -1,28 +0,0 @@
package com.baeldung.shallowdeepcopy;
import static org.junit.jupiter.api.Assertions.assertEquals;
import org.junit.jupiter.api.Test;
class ShallowDeepCopyUnitTest {
@Test
public void givenAnObjectAndADependency_whenShallowClonedAndDepencyChanges_ThenDepencyHasNewValue() throws Exception {
Dependency dependency = new Dependency(13);
Main main = new Main(dependency);
Main shallowClone = (Main) main.clone();
dependency.setValue(17);
assertEquals(17, shallowClone.getDependency()
.getValue());
}
@Test
public void givenAnObjectAndADependency_whenDeepClonedAndDepencyChanges_ThenDepencyKeepsOldValue() throws Exception {
Dependency dependency = new Dependency(13);
Main main = new Main(dependency);
Main deepClone = (Main) main.deepClone();
dependency.setValue(17);
assertEquals(13, deepClone.getDependency()
.getValue());
}
}