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(gè)非靜態(tài)方法，只能通過類對(duì)象訪問，如果嘗試使用類名稱訪問該方法，則會(huì)收到錯(cuò)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(shí)， last()方法可能會(huì)引發(fā)異常。

  NoSuchElementException: – This exception may throw when this TreeSet is "empty".

  NoSuchElementException ：–當(dāng)此TreeSet為“空”時(shí)，可能引發(fā)此異常。

Syntax:

句法：

public Element last();

Parameter(s):

參數(shù)：

• It does not accept any parameter.

  它不接受任何參數(shù)。

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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