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Display Sub-List of ArrayList in Java
The sub-list of an ArrayList can be obtained using the java.util.ArrayList.subList() method. This method takes two parameters i.e. the start index for the sub-list(inclusive) and the end index for the sub-list(exclusive) from the required ArrayList. If the start index and the end index are the same, then an empty sub-list is returned.
A program that demonstrates this is given as follows
Example
import java.util.ArrayList;
import java.util.List;
public class Demo {
public static void main(String[] args) {
ArrayList aList = new ArrayList();
aList.add("Apple");
aList.add("Mango");
aList.add("Banana");
aList.add("Melon");
aList.add("Guava");
aList.add("Orange");
aList.add("Grapes");
aList.add("Peach");
List sList = aList.subList(2, 6);
System.out.println("The sub-list elements are: ");
for (int i = 0; i < sList.size(); i++) {
System.out.println(sList.get(i));
}
}
}The output of the above program is as follows
The sub-list elements are Banana Melon Guava Orange
Now let us understand the above program.
The ArrayList aList is created. Then ArrayList.add() is used to add the elements to the ArrayList. A code snippet which demonstrates this is as follows
ArrayList aList = new ArrayList();
aList.add("Apple");
aList.add("Mango");
aList.add("Banana");
aList.add("Melon");
aList.add("Guava");
aList.add("Orange");
aList.add("Grapes");
aList.add("Peach");The ArrayList.subList() method is used to create a sub-list which contains the elements from index 2(inclusive) to 6(exclusive) of the ArrayList. Then the sub-list elements are displayed using a for loop. A code snippet which demonstrates this is as follows
List sList = aList.subList(2, 6);
System.out.println("The sub-list elements are: ");
for (int i = 0; i < sList.size(); i++) {
System.out.println(sList.get(i));
}
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