java 方法 示例

ArrayDeque類removeFirstOccurrence()方法 (ArrayDeque Class removeFirstOccurrence() method)

• removeFirstOccurrence() method is available in java.lang package.

  removeFirstOccurrence()方法在java.lang包中可用。

• removeFirstOccurrence() method is used to remove the first occurrence of the given element in this deque.

  removeFirstOccurrence()方法用于刪除此雙端隊列中給定元素的首次出現。

• removeFirstOccurrence() method is a non-static method, it is accessible with the class object only and if we try to access the method with the class name then we will get an error.

  removeFirstOccurrence()方法是一個非靜態方法，僅可通過類對象訪問，如果嘗試使用類名訪問該方法，則會收到錯誤消息。

• removeFirstOccurrence() method does not throw an exception at the time of removing the first occurrence of the given object.

  removeFirstOccurrence()方法在刪除給定對象的第一次出現時不會引發異常。

Syntax:

句法：

    public boolean removeFirstOccurrence (Object obj);

Parameter(s):

參數：

• Object obj – represents the element to be removed of the first occurrence from this deque.

  對象obj –表示從此雙端隊列首次出現時要刪除的元素。

Return value:

返回值：

The return type of this method is boolean, it returns true if the given element is removed successfully, else it returns false.

此方法的返回類型為boolean ，如果成功刪除給定元素，則返回true ，否則返回false 。

Example:

例：

// Java program to demonstrate the example 
// of boolean removeFirstOccurrence(Object obj) 
// method of ArrayDeque 
import java.util.*;
public class RemoveFirstOccurrenceOfArrayDeque {
public static void main(String[] args) {
// Creating an ArrayDeque with initial capacity of
// storing elements
Deque < String > d_queue = new ArrayDeque < String > (10);
// By using add() method to add elements
// in ArrayDeque
d_queue.add("C");
d_queue.add("C++");
d_queue.add("Java");
d_queue.add("Php");
d_queue.add("DotNet");
d_queue.add("Java");
// Display Deque Elements
System.out.println("d_queue before removeFirstOccurrence(): ");
System.out.println("ArrayDeque Elements = " + d_queue);
System.out.println();
// By using removeFirstOccurrence() method to remove
// the first occurrence of the given element "Java"
d_queue.removeFirstOccurrence("Java");
System.out.println();
// Display Deque Elements
System.out.println("d_queue after removeFirstOccurrence(): ");
System.out.println("ArrayDeque Elements = " + d_queue);
}
}

Output

輸出量

d_queue before removeFirstOccurrence(): 
ArrayDeque Elements = [C, C++, Java, Php, DotNet, Java]d_queue after removeFirstOccurrence(): 
ArrayDeque Elements = [C, C++, Php, DotNet, Java]

翻譯自: https://www.includehelp.com/java/arraydeque-removefirstoccurrence-method-with-example.aspx

java 方法 示例