java arraylist
import java.util.List; //list abstract class
import java.util.ArrayList; //arraylist class
//Object Lists
List l = new ArrayList();
ArrayList a = new ArrayList();
//Specialized List
List<String> l = new ArrayList<String>();
ArrayList<Integer> a = new ArrayList<Integer>();
//only reference data types allowed in brackets <>
//Initial Capacity
List<Double> l = new ArrayList<Double>(5);
//list will start with a capacity of 5
//saves allocation timesarraylist methods in java
// Assign to list variable directly with STREAM FILTER METHID
ArrayList<String> filteredColors = (ArrayList<String>) colors.stream().filter(x -> x.contains("o")).collect(Collectors.toList());
// Clone and remove unwanted(TRADITIONAL FILTERING)
filteredColors = (ArrayList<String>) colors.clone();
filteredColors.removeIf(x -> !x.contains("o"));
// Find specific element
colors.stream().filter(x -> x.contains("ora")).findFirst().get();arraylist in java
Size is dynamic
Only supports objects
not syncronized
array based classCopyright © 2021 Codeinu
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