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List<Integer> list = new ArrayList<>();
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ArrayList<Integer> integerArray = new ArrayList<Integer>();
ArrayList<String> stringArray = new ArrayList<String>();
ArrayList<Double> doubleArray = new ArrayList<Double>();
//... keep replacing what is inside the <> with the appropriate
//data type
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import java.util.ArrayList;
//create ArrayList
ArrayList<String> arrayList = new ArrayList<String>();
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import java.util.ArrayList;
class Main {
public static void main(String[] args){
// create ArrayList
ArrayList<String> languages = new ArrayList<>();
// Add elements to ArrayList
languages.add("Java");
languages.add("Python");
languages.add("Swift");
System.out.println("ArrayList: " + languages);
}
}
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List<List<Individual>> group = new ArrayList<List<Individual>>(4);
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class Main {
public static void main(String[] args){
var languages = List.of("Java", "Python", "Swift");
System.out.println("ArrayList: " + languages);
}
}
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import java.util.ArrayList;
public class ArrayLists {
public static void main(String[] args) {
ArrayList<String> cars = new ArrayList<String>();
cars.add("Volvo");
cars.add("BMW");
cars.add("Ford");
cars.add("Mazda");
System.out.println(cars); // [Volvo, BMW, Ford, Mazda]
System.out.println(cars.isEmpty()); // false
System.out.println(cars.size()); // 4
cars.remove(0); // removes the element at index 0 (i.e. "Volvo")
System.out.println();
System.out.println(cars); // [BMW, Ford, Mazda]
System.out.println(cars.isEmpty()); // false
System.out.println(cars.size()); // 3
cars.remove(1); // removes the element at index 1 (i.e. "Ford")
System.out.println();
System.out.println(cars); // [BMW, Mazda]
cars.add("Mercedes");
System.out.println();
System.out.println(cars); // [BMW, Mazda, Mercedes]
cars.clear();
System.out.println();
System.out.println(cars); // []
System.out.println(cars.isEmpty()); // true
System.out.println(cars.size()); // 0
}
}