How To Convert Array to ArrayList

Let’s see some sample programs on how to convert Array to ArrayList

Sample Program 1:

package classFiveArrays;

import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collections;

public class ConvertArrayToArrayList {
	
	public static void main (String [] args){
		
		//Using asList
		String[] students = {"Raj", "Kumar", "Rajkumar"};
		
		ArrayList<String> arrList = new ArrayList<>(Arrays.asList(students));
		
		arrList.add("Ramesh");
		arrList.add("Bala");
		
		System.out.println(arrList);
		
		System.out.println(arrList.get(2));
		
	}

}

Output:

[Raj, Kumar, Rajkumar, Ramesh, Bala]
Rajkumar
[Raj, Kumar, Rajkumar, Ramesh, Bala]

Sample Program 2:

package classFiveArrays;

import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collections;

public class ConvertArrayToArrayList {
	
	public static void main (String [] args){
		
		//Using Collection.addAll
		String[] students = {"Raj", "Kumar", "Rajkumar"};
		
		ArrayList<String> arrList = new ArrayList<String>();
		
		Collections.addAll(arrList, students);
				
		arrList.add("Hello");
		
		System.out.println(arrList);
		
	}

}

Output:

[Raj, Kumar, Rajkumar, Hello]

Sample Program 3:

package classFiveArrays;

import java.util.ArrayList;
import java.util.Arrays;
import java.util.Collections;

public class ConvertArrayToArrayList {
	
	public static void main (String [] args){
		
	    ArrayList<String> arrList= new ArrayList<String>();
	    String array[] = {"Raj","Kumar","Rajkumar"};   

	    //array.length returns the current number of elements present in array
	    for(int i =0;i<array.length;i++)
            {
	    	//We are adding each array's element to the ArrayList
	    	arrList.add(array[i]);
	    }
	    
	    System.out.println(arrList);
	    
	    /*ArrayList content*/
	    for(String str: arrList)
	    {
	         System.out.println(str);
	    }
		
	}

}

Output:

[Raj, Kumar, Rajkumar]
Raj
Kumar
Rajkumar

Must Read: Java Tutorial