The java.util.ArrayList.get(int index) method returns the element at the specified position in this list.
Java ArrayList get() Method Example
import java.util.ArrayList;
import java.util.List;
// How to check if an ArrayList is empty using the isEmpty() method.
// How to find the size of an ArrayList using the size() method.
// How to access the element at a particular index in an ArrayList using the get() method.
// How to modify the element at a particular index in an ArrayList using the set() method.
public class AccessElementsFromArrayListExample {
public static void main(String[] args) {
List<String> topProgrammingLanguages = new ArrayList<>();
// Check if an ArrayList is empty
System.out.println("Is the topProgrammingLanguages list empty? : "
+ topProgrammingLanguages.isEmpty());
topProgrammingLanguages.add("C");
topProgrammingLanguages.add("Java");
topProgrammingLanguages.add("C++");
topProgrammingLanguages.add("Python");
topProgrammingLanguages.add(".net");
// Find the size of an ArrayList
System.out.println("Here are the top " + topProgrammingLanguages.size()
+ " Programming Languages in the world");
System.out.println(topProgrammingLanguages);
// Retrieve the element at a given index
String bestProgrammingLang = topProgrammingLanguages.get(1);
String secondBestProgrammingLang = topProgrammingLanguages.get(1);
String dotNetProgrammingLang = topProgrammingLanguages
.get(topProgrammingLanguages.size() - 1);
System.out.println("best Programming Lang: " + bestProgrammingLang);
System.out.println("Second Best Programming Lang: " + secondBestProgrammingLang);
System.out.println("Dot Net Programming Lang: " + dotNetProgrammingLang);
// Modify the element at a given index
topProgrammingLanguages.set(4, "C#");
System.out.println("Modified top Programming Languages list: " + topProgrammingLanguages);
}
}
Output:
Is the topProgrammingLanguages list empty? : true
Here are the top 5 Programming Languages in the world
[C, Java, C++, Python, .net]
best Programming Lang: Java
Second Best Programming Lang: Java
Dot Net Programming Lang: .net
Modified top Programming Languages list: [C, Java, C++, Python, C#]
Reference
Java ArrayList Source Code Examples
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ArrayList
Collection Framework
Java
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