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Java Array Exercises: Convert an array to ArrayList

Java Array: Exercise-20 with Solution

Write a Java program to convert an array to ArrayList.

Pictorial Presentation:

Java Array Exercises: Convert an array to ArrayList

Sample Solution:

Java Code :

import java.util.ArrayList;
  import java.util.Arrays;
public class Exercise20 {
  public static void  main(String[] args) 
  {
  String[]  my_array = new String[] {"Python", "JAVA", "PHP",  "Perl", "C#", "C++"};
  ArrayList<String>  list = new ArrayList<String>(Arrays.asList(my_array));
  
  System.out.println(list);
  }
}

Sample Output: 

[Python, JAVA, PHP, Perl, C#, C++]

Flowchart:

Flowchart: Java exercises: Convert an array to ArrayList

Visualize Java code execution (Python Tutor):


Java Code Editor:

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Java: Tips of the Day

countOccurrences

Counts the occurrences of a value in an array.

Use Arrays.stream().filter().count() to count total number of values that equals the specified value.

public static long countOccurrences(int[] numbers, int value) {
    return Arrays.stream(numbers)
            .filter(number -> number == value)
            .count();
}

Ref: https://bit.ly/3kCAgLb