[count-upper-lower] count upper/lowercase letters
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### Relevant Articles:
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### Relevant Articles:
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>>>>>>> be317465c ([count-upper-lower] count upper/lowercase letters)
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<?xml version="1.0" encoding="UTF-8"?>
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<project xmlns="http://maven.apache.org/POM/4.0.0"
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xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
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xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
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<modelVersion>4.0.0</modelVersion>
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<artifactId>core-java-string-operations-8</artifactId>
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<name>core-java-string-operations-8</name>
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<packaging>jar</packaging>
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<parent>
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<groupId>com.baeldung.core-java-modules</groupId>
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<artifactId>core-java-modules</artifactId>
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<version>0.0.1-SNAPSHOT</version>
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</parent>
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<dependencies>
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<dependency>
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<groupId>org.apache.commons</groupId>
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<artifactId>commons-lang3</artifactId>
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<version>${apache.commons.lang3.version}</version>
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</dependency>
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<dependency>
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<groupId>org.apache.commons</groupId>
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<artifactId>commons-text</artifactId>
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<version>${commons-text.version}</version>
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</dependency>
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<dependency>
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<groupId>org.liquibase</groupId>
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<artifactId>liquibase-core</artifactId>
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<version>4.9.1</version>
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<scope>test</scope>
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</dependency>
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<dependency>
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<groupId>org.junit.jupiter</groupId>
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<artifactId>junit-jupiter</artifactId>
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<version>5.8.1</version>
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<scope>test</scope>
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</dependency>
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<dependency>
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<groupId>org.liquibase</groupId>
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<artifactId>liquibase-core</artifactId>
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<version>4.9.1</version>
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<scope>test</scope>
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</dependency>
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<dependency>
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<groupId>junit</groupId>
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<artifactId>junit</artifactId>
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<version>4.13.2</version>
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</dependency>
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</dependencies>
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<build>
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<plugins>
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<plugin>
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<groupId>org.apache.maven.plugins</groupId>
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<artifactId>maven-compiler-plugin</artifactId>
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<configuration>
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<source>${maven.compiler.source}</source>
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<target>${maven.compiler.target}</target>
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</configuration>
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</plugin>
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</plugins>
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</build>
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<properties>
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<maven.compiler.source>11</maven.compiler.source>
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<maven.compiler.target>11</maven.compiler.target>
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<apache.commons.lang3.version>3.13.0</apache.commons.lang3.version>
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<commons-text.version>1.10.0</commons-text.version>
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</properties>
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</project>
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<?xml version="1.0" encoding="UTF-8"?>
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<project xmlns="http://maven.apache.org/POM/4.0.0"
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xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
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xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
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<modelVersion>4.0.0</modelVersion>
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<artifactId>core-java-string-operations-8</artifactId>
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<name>core-java-string-operations-8</name>
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<packaging>jar</packaging>
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<parent>
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<groupId>com.baeldung.core-java-modules</groupId>
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<artifactId>core-java-modules</artifactId>
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<version>0.0.1-SNAPSHOT</version>
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</parent>
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<build>
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<plugins>
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<plugin>
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<groupId>org.apache.maven.plugins</groupId>
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<artifactId>maven-compiler-plugin</artifactId>
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<configuration>
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<source>${maven.compiler.source}</source>
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<target>${maven.compiler.target}</target>
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</configuration>
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</plugin>
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</plugins>
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</build>
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<properties>
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<maven.compiler.source>11</maven.compiler.source>
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<maven.compiler.target>11</maven.compiler.target>
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</properties>
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</project>
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@ -0,0 +1,85 @@
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package com.baeldung.countupperandlowercasechars;
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import org.junit.jupiter.api.Test;
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import static org.junit.jupiter.api.Assertions.assertEquals;
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public class CountUpperAndLowercaseCharsUnitTest {
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private static final String MY_STRING = "Hi, Welcome to Baeldung! Let's count letters!";
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private static final LetterCount EXPECTED = new LetterCount(4, 31);
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@Test
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void whenIteratingCharArrayCompareAndCount_thenGetExpectedResult() {
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int upperCnt = 0;
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int lowerCnt = 0;
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for (char c : MY_STRING.toCharArray()) {
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if (c >= 'A' && c <= 'Z') {
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upperCnt++;
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}
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if (c >= 'a' && c <= 'z') {
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lowerCnt++;
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}
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}
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LetterCount result = new LetterCount(upperCnt, lowerCnt);
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assertEquals(EXPECTED, result);
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}
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@Test
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void whenUsingCharacterIsLowerOrUpperCase_thenGetExpectedResult() {
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int upperCnt = 0;
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int lowerCnt = 0;
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for (char c : MY_STRING.toCharArray()) {
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if (Character.isUpperCase(c)) {
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upperCnt++;
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}
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if (Character.isLowerCase(c)) {
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lowerCnt++;
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}
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}
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LetterCount result = new LetterCount(upperCnt, lowerCnt);
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assertEquals(EXPECTED, result);
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}
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@Test
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void whenUsingStreamFilterAndCount_thenGetExpectedResult() {
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LetterCount result = new LetterCount(
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(int) MY_STRING.chars().filter(Character::isUpperCase).count(),
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(int) MY_STRING.chars().filter(Character::isLowerCase).count()
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);
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assertEquals(EXPECTED, result);
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}
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}
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class LetterCount {
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private int uppercaseCnt;
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private int lowercaseCnt;
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public LetterCount(int uppercaseCnt, int lowercaseCnt) {
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this.uppercaseCnt = uppercaseCnt;
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this.lowercaseCnt = lowercaseCnt;
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}
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@Override
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public boolean equals(Object o) {
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if (this == o) {
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return true;
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}
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if (!(o instanceof LetterCount)) {
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return false;
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}
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LetterCount that = (LetterCount) o;
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if (uppercaseCnt != that.uppercaseCnt) {
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return false;
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}
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return lowercaseCnt == that.lowercaseCnt;
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}
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@Override
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public int hashCode() {
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int result = uppercaseCnt;
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result = 31 * result + lowercaseCnt;
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return result;
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}
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}
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