这个 更高(E) 方法 JAVAutil。同时发生的ConcurrentSkipListSet 是Java中的一个内置函数,它返回该集合中严格大于给定元素的最小元素,如果没有这样的元素,则返回null。
null
语法:
public E higher(E e)
参数: 该函数只接受一个参数 E i、 e要匹配的值
返回值: 函数返回大于e的最小元素,如果没有这样的元素,则返回null。
例外情况: 该函数引发以下异常:
下面的程序演示了ConcurrentSkipListSet。高等教育法:
项目1:
// Java program to demonstrate higher() // method of ConcurrentSkipListSet import java.util.concurrent.*; class ConcurrentSkipListSetHigherExample1 { public static void main(String[] args) { // Creating a set object ConcurrentSkipListSet<Integer> Lset = new ConcurrentSkipListSet<Integer>(); // Adding elements to this set for ( int i = 10 ; i <= 50 ; i += 10 ) Lset.add(i); // Finding higher of 20 in the set System.out.println( "The higher of 20 in the set: " + Lset.higher( 20 )); // Finding higher of 39 in the set System.out.println( "The higher of 39 in the set: " + Lset.higher( 39 )); // Finding higher of 50 in the set System.out.println( "The higher of 50 in the set: " + Lset.higher( 50 )); } } |
输出:
The higher of 20 in the set: 30 The higher of 39 in the set: 40 The higher of 50 in the set: null
项目2: 在更高版本()中显示NullPointerException的程序。
// Java program to demonstrate higher() // method of ConcurrentSkipListSet import java.util.concurrent.*; class ConcurrentSkipListSetHigherExample1 { public static void main(String[] args) { // Creating a set object ConcurrentSkipListSet<Integer> Lset = new ConcurrentSkipListSet<Integer>(); // Adding elements to this set for ( int i = 10 ; i <= 50 ; i += 10 ) Lset.add(i); try { // Trying to find higher of "null" in the set System.out.println( "The higher of null in the set: " + Lset.higher( null )); } catch (Exception e) { System.out.println( "Exception: " + e); } } } |
输出:
Exception: java.lang.NullPointerException
参考: https://docs.oracle.com/javase/8/docs/api/java/util/concurrent/ConcurrentSkipListSet.html#higher-E-
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