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BAEL-9480: Add code for article: Splitting String and Put It on int A… #18878

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Merged
merged 1 commit into from
Oct 22, 2025
Merged

BAEL-9480: Add code for article: Splitting String and Put It on int A… #18878

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19 changes: 19 additions & 0 deletions ...conversions-4/src/main/java/com/baeldung/splitstringtointarray/SplitStringToIntArray.java
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package com.baeldung.splitstringtointarray;

public class SplitStringToIntArray {

public int[] convert(String numbers, String delimiterRegex) {
if (numbers == null || numbers.isEmpty()) {
return new int[0];
}

String[] parts = numbers.split(delimiterRegex);
int[] intArray = new int[parts.length];

for (int i = 0; i < parts.length; i++) {
intArray[i] = Integer.parseInt(parts[i].trim());
}

return intArray;
}
}
33 changes: 33 additions & 0 deletions ...4/src/test/java/com/baeldung/splitstringtointarray/StringToIntArrayConverterUnitTest.java
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package com.baeldung.splitstringtointarray;

import org.junit.jupiter.api.Test;
import static org.assertj.core.api.Assertions.assertThat;

class StringToIntArrayConverterUnitTest {

private final SplitStringToIntArray converter = new SplitStringToIntArray();

@Test
void givenCommaSeparatedString_whenConvert_thenReturnIntArray() {
int[] result = converter.convert("10, 20, 30, 40, 50", ",");
assertThat(result).containsExactly(10, 20, 30, 40, 50);
}

@Test
void givenSemicolonSeparatedString_whenConvert_thenReturnIntArray() {
int[] result = converter.convert("10; 20; 30; 40; 50", ";");
assertThat(result).containsExactly(10, 20, 30, 40, 50);
}

@Test
void givenPipeSeparatedString_whenConvert_thenReturnIntArray() {
int[] result = converter.convert("10|20|30|40|50", "\\|");
assertThat(result).containsExactly(10, 20, 30, 40, 50);
}

@Test
void givenEmptyString_whenConvert_thenReturnEmptyArray() {
int[] result = converter.convert("", ",");
assertThat(result).isEmpty();
}
}