treeset java_Java TreeSet last()方法与示例
treeset java
TreeSet類的last()方法 (TreeSet Class last() method)
last() method is available in java.util package.
last()方法在java.util包中可用。
last() method is used to return the largest element that exists in this TreeSet.
last()方法用于返回此TreeSet中存在的最大元素。
last() 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.
last()方法是一個非靜態方法,只能通過類對象訪問,如果嘗試使用類名稱訪問該方法,則會收到錯誤消息。
last() method may throw an exception at the time of returning the highest element in this TreeSet.
返回此TreeSet中的最高元素時, last()方法可能會引發異常。
NoSuchElementException: – This exception may throw when this TreeSet is "empty".
NoSuchElementException :–當此TreeSet為“空”時,可能引發此異常。
Syntax:
句法:
public Element last();Parameter(s):
參數:
It does not accept any parameter.
它不接受任何參數。
Return value:
返回值:
The return type of the method is Element, it retrieves greatest element in this TreeSet.
方法的返回類型為Element ,它檢索此TreeSet中的最大元素。
Example:
例:
// Java program to demonstrate the example // of Element last() method of TreeSet import java.util.*;public class LastOfTreeSet {public static void main(String[] args) {// Instantiates a TreeSet objectTreeSet < String > tree_set = new TreeSet < String > ();// By using add() method is to add// the given object of this// TreeSet tree_set.add("C");tree_set.add("C++");tree_set.add("JAVA");tree_set.add("PHP");tree_set.add("SFDC");// Display TreeSetSystem.out.println("TreeSet: " + tree_set);// By using last() method is to// return the last highest element// exists in this TreeSetObject last = tree_set.last();// Display ObjectSystem.out.println("tree_set.last(): " + last);} }Output
輸出量
TreeSet: [C, C++, JAVA, PHP, SFDC] tree_set.last(): SFDC翻譯自: https://www.includehelp.com/java/treeset-last-method-with-example.aspx
treeset java
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