Which of the following methods is used to copy elements from one ArrayList to another?Question 2Answera.Collections.copy()b.duplicate()c.clone()d.copy()
Question
Which of the following methods is used to copy elements from one ArrayList to another?Question 2Answera.Collections.copy()b.duplicate()c.clone()d.copy()
Solution
Para responder a la pregunta sobre cuál de los métodos se utiliza para copiar elementos de un ArrayList a otro, sigamos estos pasos:
-
Entender las opciones:
- a.
Collections.copy() - b.
duplicate() - c.
clone() - d.
copy()
- a.
-
Analizar cada opción:
- a.
Collections.copy(): Este método es parte de la claseCollectionsen Java y se utiliza específicamente para copiar elementos de una lista a otra. - b.
duplicate(): Este método no es un método estándar en Java para ArrayLists. - c.
clone(): Este método crea una copia superficial del ArrayList, pero no se utiliza para copiar elementos de un ArrayList a otro existente. - d.
copy(): No es un método estándar en Java para ArrayLists.
- a.
-
Conclusión: La opción correcta es a.
Collections.copy(). Este método se utiliza para copiar elementos de un ArrayList a otro en Java.
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