treeset java

TreeSet类Higher()方法 (TreeSet Class higher() method)

• higher() method is available in java.util package.

  Higher()方法在java.util包中可用。

• higher() method is used to return the lowest element in this TreeSet that is higher than the specified element (ele).

  Higher()方法用于返回此TreeSet中比指定元素(ele)高的最低元素。

• higher() 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.

  Higher()方法是一种非静态方法，只能通过类对象访问，如果尝试使用类名称访问该方法，则会收到错误消息。

• higher() method may throw an exception at the time of returning the element.

  Higher()方法在返回元素时可能会引发异常。

  • ClassCastException: This exception may throw when the given parameter is incompatible to compare.ClassCastException ：如果给定参数不兼容以进行比较，则可能引发此异常。
  • NullPointerException: This exception may throw when the given element is null exists.NullPointerException ：当给定元素为null时，可能引发此异常。

Syntax:

句法：

    public Element higher(Element ele);

Parameter(s):

参数：

• Element ele – represents the element (ele) is to be checked with other element exists in this TreeSet.

  元素ele –表示要与该TreeSet中存在的其他元素检查元素(ele)。

Return value:

返回值：

The return type of the method is Element, it returns least element higher than the given element (ele) in this TreeSet otherwise it returns null.

方法的返回类型为Element ，它返回比此TreeSet中给定元素(ele)高的最小元素，否则返回null。

Example:

例：

// Java program to demonstrate the example 
// of Element higher(Element ele) method of TreeSet 
import java.util.*;
public class HigherOfTreeSet {
public static void main(String[] args) {
// Instantiates a TreeSet object
TreeSet < 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 TreeSet
System.out.println("TreeSet: " + tree_set);
// By using higher() method is to
// return the least element higher than
// the given element i.e. PHP
Object least = tree_set.higher("Microservices");
// Display least
System.out.println("tree_set.higher(Microservices): " + least);
}
}

Output

输出量

TreeSet: [C, C++, JAVA, PHP, SFDC]
tree_set.higher(Microservices): PHP

翻译自: https://www.includehelp.com/java/treeset-higher-method-with-example.aspx

treeset java