In this post, we will learn to join two arraylist in java with example
ArrayList is a dynamic array concept in java. We use ArrayList in so many places.
Syntax
list1.addAll(list2);
From the above syntax list2 will added to list1.
Example
import java.util.ArrayList;
import java.util.List;
public class Join2List {
public static void main(String[] args) {
try {
List<String> list1 = new ArrayList<String>();
List<String> list2 = new ArrayList<String>();
list1.add("Rajesh");
list1.add("Usha");
list2.add("Kumar");
list2.add("Nandhini");
System.out.println("---List1 value before adding list2---");
for (String string : list1) {
System.out.println(string);
}
// Adding list2 to list1
list1.addAll(list2);
System.out.println("---List1 value After adding list2---");
for (String string : list1) {
System.out.println(string);
}
} catch (Exception e) {
e.printStackTrace();
}
}
}
Output
---List1 value before adding list2---
Rajesh
Usha
---List1 value After adding list2---
Rajesh
Usha
Kumar
Nandhini
Github
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