El método toString() de CopyOnWriteArrayList devuelve la representación de string de la lista.
Sintaxis:
public String toString()
Parámetros: La función no acepta ningún parámetro.
Valor devuelto: la función devuelve la representación de string de la lista.
Los siguientes programas ilustran la función anterior:
Programa 1:
// Java Program to illustrate the CopyOnWriteArrayList
// toString() method in Java
import java.util.concurrent.CopyOnWriteArrayList;
import java.util.*;
public class GFG {
public static void main(String[] args)
{
// create object of CopyOnWriteArrayList
CopyOnWriteArrayList<Integer> ArrLis
= new CopyOnWriteArrayList<Integer>();
// Add elements
ArrLis.add(32);
ArrLis.add(67);
ArrLis.add(98);
ArrLis.add(100);
// print CopyOnWriteArrayList
System.out.println("CopyOnWriteArrayList: "
+ ArrLis);
System.out.println("ArrLis converted to string: "
+ ArrLis.toString());
}
}
Producción:
CopyOnWriteArrayList: [32, 67, 98, 100] ArrLis converted to string: [32, 67, 98, 100]
Programa 2:
// Java Program to illustrate the CopyOnWriteArrayList
// toString()() method in Java
import java.util.concurrent.CopyOnWriteArrayList;
import java.util.*;
public class GFG {
public static void main(String[] args)
{
// create object of CopyOnWriteArrayList
CopyOnWriteArrayList<String> ArrLis
= new CopyOnWriteArrayList<String>();
// Add elements
ArrLis.add("gopal");
ArrLis.add("gfg");
ArrLis.add("jgec");
ArrLis.add("sudo");
// print CopyOnWriteArrayList
System.out.println("CopyOnWriteArrayList: " + ArrLis);
System.out.println("ArrLis converted to string: "
+ ArrLis.toString());
}
}
Producción:
CopyOnWriteArrayList: [gopal, gfg, jgec, sudo] ArrLis converted to string: [gopal, gfg, jgec, sudo]
Referencia: https://docs.oracle.com/javase/8/docs/api/java/util/concurrent/CopyOnWriteArrayList.html#toString–