Question

How to add an element to specified index in ArrayList in Java

Answer 1

package javaapplication1;
 
import java.util.ArrayList;
 
public class JavaApplication1 {
 
    public static void main(String[] args) {
 
        ArrayList arrList = new ArrayList();
    
        arrList.add("Java");
        arrList.add("C#");
        arrList.add("C++");
 
        for (int i = 0; i < arrList.size(); i++) 
            System.out.println(arrList.get(i));
      
        arrList.add(2, "Swift"); // does not overwrite -> insert the element 
         
        System.out.println();
        for (int i = 0; i < arrList.size(); i++) 
            System.out.println(arrList.get(i));
  }
}
   
/*
run:
  
Java
C#
C++

Java
C#
Swift
C++
   
*/

 

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Answer 2

package javaapplication1;

import java.util.ArrayList;

public class JavaApplication1 {
 
    public static void main(String[] args) {
 
        try
        {
            ArrayList arrayList = new ArrayList();
   
            arrayList.add("c#");
            arrayList.add("c++");
            arrayList.add("c");
            arrayList.add("python");
   
            arrayList.add(1, "java");
   
            for (int i = 0; i < arrayList.size(); i++)
                   System.out.println(arrayList.get(i));
        }
        catch(Exception e)
        {
              System.out.println(e.getMessage());
        }
     }
}
 
 
/*
 
run:
                    
c#
java
c++
c
python
  
*/

 

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