The ArrayList.set() method is used to set an element in an ArrayList object at the specified index.
Package: java.util
Java Platform: Java SE 8
Syntax:
set(int index,E element)
Parameters:
Name Description Type index The index of the element to be set. int element Element to be stored at the specified position.Return Value:
The element that previously existed at the specified index.
Throws:
IndexOutOfBoundsException - if the index is out of range (index < 0 || index >= size())
Pictorial presentation of ArrayList.set() Method
Example: ArrayList.set() Method
The following example shows the usage of java.util.Arraylist.set() method method.
import java.util.*;
public class test {
public static void main(String[] args) {
// create an empty array list with an initial capacity
ArrayList<String> color_list = new ArrayList<String>(5);
// use add() method to add values in the list
color_list.add("White");
color_list.add("Black");
color_list.add("Red");
color_list.add("White");
color_list.add("Yellow");
// Change the Red color to Violet
color_list.set(2, new String("Violet"));
// Print out the colors in the ArrayList
for (int i = 0; i < 5; i++)
{
System.out.println(color_list.get(i).toString());
}
}
}
Output:
F:\java>javac test.java F:\java>java test White Black Violet White Yellow
Example of Throws: set() Method
IndexOutOfBoundsException - if the index is out of range (index < 0 || index >= size()).
Let
(index < -1 || index >= size());
in the above example.
Output:
Exception in thread "main" java.lang.ArrayIndexOutOfBou
ndsException: -1
at java.util.ArrayList.elementData(ArrayList.ja
va:400)
at java.util.ArrayList.get(ArrayList.java:413)
at test.main(test.java:22)
Java Code Editor:
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