Example One: How to turn an array into an ArrayList in Java using the addAll method (without the need to autobox).

how-to-convert-an-array-to-an-arraylist-in-java-using-addall-method.groovy

@Grab(group='com.jamonapi', module='jamon', version='2.82')
import com.jamonapi.Monitor
import com.jamonapi.MonitorFactory

import static java.util.Arrays.asList

import java.util.stream.Collectors;
import java.util.List;
import java.util.Arrays;
import java.util.Random

def random = new Random()

def arrayCapacity = 10000

def numbers = new java.lang.Integer[arrayCapacity + 1]

for (int ctr in 0..arrayCapacity) {
    numbers[ctr] = java.lang.Integer.valueOf(random.nextInt())
}

def iterations = 100000

def monitor = MonitorFactory.start("Convert an array to an ArrayList performance monitor via the addAll method example")

for (ctr in 0..iterations) {
 
  def tempResult = asList (numbers)

  def result = new java.util.ArrayList (arrayCapacity) as java.util.List
  
  result.addAll (tempResult)

}

monitor.stop ()

println "iterations: $iterations, performance: $monitor"

return;

See the following article: How To Convert An Array To An ArrayList In Java!