O arrayList() é uma função da classe Kotlin ArrayList , que é usada para criar um novo ArrayList. ArrayList é mutável, o que significa que podemos modificar o conteúdo de ArrayList.
Sintaxe:
fun arrayListOf()
É usado para criar um novo ArrayList vazio.
fun arrayListOf(vararg elements: T)
É usado para criar um novo ArrayList com os elementos fornecidos.
Exemplo 1: programa Kotlin para criar uma nova ArrayList vazia.
fun main(args : Array<String>) {
var arrList = arrayListOf<String>()
println(arrList.isEmpty())
println("ArrayList : ${arrList}")
}
fun main(args : Array<String>) {
var arrList = arrayListOf<String>("Java", "Python", "JavaScript")
println(arrList.isEmpty())
println("ArrayList : ${arrList}")
}
fun main(args : Array<String>) {
var arrList = arrayListOf<Any>(1, 2, 3, "GeeksforGeeks", 100.0)
println(arrList.isEmpty())
println("ArrayList : ${arrList}")
}
fun main(args : Array<String>) {
var arrList = arrayListOf<String>();
println(arrList.size);
arrList.add("GeeksforGeeks");
println(arrList.size);
}
fun main(args : Array<String>) {
var arrList = arrayListOf<String>("Java", "Python");
println(arrList);
arrList.add(0, "Kotlin");
println(arrList);
}
fun main(args : Array<String>) {
var arrList = arrayListOf<String>();
println(arrList);
arrList.add("GeeksforGeeks");
println(arrList);
}
fun main(args : Array<String>) {
var arrList = arrayListOf<String>("Java", "Kotlin");
println(arrList);
arrList.addAll(listOf("Python", "JavaScript"));
println(arrList);
}
fun main(args : Array<String>) {
var arrList = arrayListOf<String>("Java", "Kotlin");
println(arrList);
arrList.addAll(1, listOf("Python", "JavaScript"));
println(arrList);
}
fun main(args : Array<String>) {
var arrList = arrayListOf<String>("Java", "Kotlin");
println(arrList);
arrList.clear();
println(arrList);
}
fun main(args : Array<String>) {
var arrList = arrayListOf<String>("Java", "Kotlin");
println(arrList.contains("Kotlin"));
}
fun main(args : Array<String>) {
var arrList = arrayListOf<String>("Java", "Kotlin", "Python", "JavaScript");
var checkList = listOf("Python", "Java");
println(arrList.containsAll(checkList));
}
fun main(args : Array<String>) {
var arrList = arrayListOf<String>("Java", "Kotlin", "Python", "JavaScript");
println(arrList.get(1));
}
fun main(args : Array<String>) {
var arrList = arrayListOf<String>("Java", "Kotlin", "Python", "Kotlin");
println(arrList.indexOf("Kotlin"));
}
fun main(args : Array<String>) {
var arrList = arrayListOf<String>("Java", "Kotlin", "Python", "Kotlin");
println(arrList.lastIndexOf("Kotlin"));
}
fun main(args : Array<String>) {
var arrList = arrayListOf<String>("Java", "Kotlin", "Python", "Kotlin");
println(arrList.remove("Kotlin"));
println(arrList);
}
fun main(args : Array<String>) {
var arrList = arrayListOf<String>("Java", "Kotlin", "Python", "Kotlin");
var delList = listOf("Java", "Kotlin");
println(arrList.removeAll(delList));
println(arrList);
}
fun main(args : Array<String>) {
var arrList = arrayListOf<String>("Java", "Kotlin", "Python", "Kotlin");
println(arrList.removeAt(3));
println(arrList);
}
fun main(args : Array<String>) {
var arrList = arrayListOf<String>("Java", "Kotlin", "Python", "Kotlin");
arrList.add(1, "PHP");
println(arrList);
}
fun main(args : Array<String>) {
var arrList = arrayListOf<String>("Java", "Kotlin", "Python", "Kotlin");
var arr = arrList.toArray();
for (i in arr) {
println(i);
}
}
fun main(args : Array<String>) {
var arrList = arrayListOf<String>("Java", "Kotlin", "Python", "Kotlin");
var arr = arrList.toString();
println(arr);
}
fun main(args : Array<String>) {
var arrList = arrayListOf<String>("Java", "Kotlin", "Python", "JavaScript");
println(arrList.isEmpty());
}
fun main(args : Array<String>) {
var arrList = arrayListOf<String>("Java", "Python", "JavaScript", "Kotlin");
for (index in 0..arrList.size-1) {
println("${index} => ${arrList.get(index)}");
}
}
fun main(args : Array<String>) {
var arrList = arrayListOf<String>("Java", "Python", "JavaScript", "Kotlin");
for (value in arrList) {
println(value);
}
}
fun main(args : Array<String>) {
var arrList = arrayListOf<String>("Java", "Python", "JavaScript", "Kotlin");
var i = 0;
while (i < arrList.size) {
println(arrList.get(i))
i++;
}
}
fun main(args : Array<String>) {
var arrList = arrayListOf<String>("Java", "Python", "JavaScript", "Kotlin");
var itr = arrList.iterator();
while (itr.hasNext()) {
println(itr.next());
}
}
