treeset java_Java TreeSet Higher（）方法与示例

朱雀 2023-03-05 13:24 126阅读 0赞

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][https_www.includehelp.com_java_treeset-higher-method-with-example.aspx]

treeset java

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