ArrayList類的get()方法 (ArrayList Class get() method)
get() method is available in java.util package.
get()方法在java.util包中可用。
get() method is used to retrieve the element at the given index in this Arraylist.
get()方法用于檢索此Arraylist中給定索引處的元素。
get() method is a non-static method so it is accessible with the class object and if we try to access the method with the class name then we will get an error.
get()方法是一種非靜態方法，因此可以通過類對象進行訪問，如果嘗試使用類名稱訪問該方法，則會收到錯誤消息。
get() method may throw an exception at the time of returning an element of the given indices.
在返回給定索引的元素時， get()方法可能會引發異常。
IndexOutOfBoundsException:- This exception may throw when the given indices are not in a range.
IndexOutOfBoundsException：-當給定索引不在范圍內時，可能引發此異常。
Syntax:
句法：
public T get(int indices);
Parameter(s):
參數：
int indices – represents the index of the element to retrieve.
int index –表示要檢索的元素的索引。
Return value:
返回值：
The return type of this method is T, it returns the element at the given index in this Arraylist.
此方法的返回類型為T ，它返回此Arraylist中給定索引處的元素。
Example:
例：
// Java program to demonstrate the example
// of T get(int) method of ArrayList.
import java.util.*;
public class GetOfArrayList {
public static void main(String[] args) {
// Create an ArrayList with initial
// capacity of storing elements
ArrayList < String > arr_l = new ArrayList < String > (10);
// By using add() method is to add
// elements in this ArrayList
arr_l.add("C");
arr_l.add("C++");
arr_l.add("JAVA");
arr_l.add("DOTNET");
arr_l.add("PHP");
// Display ArrayList
System.out.println("ArrayList Elements :" + arr_l);
// By using get(int) method is to return the
// element at the given index in this ArrayList
String element = arr_l.get(2);
// Display Returned Element
System.out.println("arr_l.get(2) : " + element);
}
}
Output
輸出量
ArrayList Elements :[C, C++, JAVA, DOTNET, PHP]
arr_l.get(2) : JAVA
翻譯自: https://www.includehelp.com/java/arraylist-get-method-with-example.aspx
