This example uses the Apache Commons Lang’s ArrayUtils.toMap() method to convert a two-dimensional array into a Map object.
To convert a two-dimensional array into a Map object, each element of the two-dimensional array must be an array with at least two elements where the first element will be the key and the second element will be the value.
package org.kodejava.commons.lang;
import java.util.Map;
import org.apache.commons.lang3.ArrayUtils;
public class ArrayToMapExample {
public static void main(String[] args) {
// A two-dimensional array of country capital.
String[][] countries = {{"United States", "Washington, D.C."},
{"United Kingdom", "London"},
{"Netherlands", "Amsterdam"},
{"Japan", "Tokyo"},
{"France", "Paris"}};
// Convert an array to a Map.
Map<Object, Object> capitals = ArrayUtils.toMap(countries);
for (Object key : capitals.keySet()) {
System.out.printf("%s is the capital of %s.%n", capitals.get(key), key);
}
}
}
The result of our code snippet:
London is the capital of United Kingdom.
Amsterdam is the capital of Netherlands.
Paris is the capital of France.
Washington, D.C. is the capital of United States.
Tokyo is the capital of Japan.
Maven Dependencies
<dependency>
<groupId>org.apache.commons</groupId>
<artifactId>commons-lang3</artifactId>
<version>3.13.0</version>
</dependency>
Founder at Kode Java Org
A programmer, recreational runner and diver, live in the island of Bali, Indonesia. Programming in Java, Spring, Hibernate / JPA. You can support me working on this project, buy me a cup of coffee ☕ every little bit helps, thank you 🙏
Latest posts by Wayan (see all)
- How do I compile and execute a JDK preview features with Maven? - December 8, 2023
- How do I sum object property using Stream API? - December 7, 2023
- How do I iterate through date range in Java? - October 5, 2023