爪哇。util。哈希表。Java中Hashtable类的elements()方法用于获取Hashtable中存在的值的枚举。
null
语法:
Enumeration enu = Hash_table.elements()
参数: 该方法不采用任何参数。
返回值: 该方法返回哈希表值的枚举。
下面的程序用来说明java的工作原理。util。哈希表。elements()方法: 项目1:
// Java code to illustrate the elements() method import java.util.*; public class Hash_Table_Demo { public static void main(String[] args) { // Creating an empty Hashtable Hashtable<Integer, String> hash_table = new Hashtable<Integer, String>(); // Inserting elements into the table hash_table.put( 10 , "Geeks" ); hash_table.put( 15 , "4" ); hash_table.put( 20 , "Geeks" ); hash_table.put( 25 , "Welcomes" ); hash_table.put( 30 , "You" ); // Displaying the Hashtable System.out.println( "The Table is: " + hash_table); // Creating an empty enumeration to store Enumeration enu = hash_table.elements(); System.out.println( "The enumeration of values are:" ); // Displaying the Enumeration while (enu.hasMoreElements()) { System.out.println(enu.nextElement()); } } } |
输出:
The Table is: {10=Geeks, 20=Geeks, 30=You, 15=4, 25=Welcomes} The enumeration of values are: Geeks Geeks You 4 Welcomes
项目2:
// Java code to illustrate the elements() method import java.util.*; public class Hash_Table_Demo { public static void main(String[] args) { // Creating an empty Hashtable Hashtable<String, Integer> hash_table = new Hashtable<String, Integer>(); // Inserting elements into the table hash_table.put( "Geeks" , 10 ); hash_table.put( "4" , 15 ); hash_table.put( "Geeks" , 20 ); hash_table.put( "Welcomes" , 25 ); hash_table.put( "You" , 30 ); // Displaying the Hashtable System.out.println( "The Table is: " + hash_table); // Creating an empty enumeration to store Enumeration enu = hash_table.elements(); System.out.println( "The enumeration of values are:" ); // Displaying the Enumeration while (enu.hasMoreElements()) { System.out.println(enu.nextElement()); } } } |
输出:
The Table is: {You=30, Welcomes=25, 4=15, Geeks=20} The enumeration of values are: 30 25 15 20
© 版权声明
文章版权归作者所有,未经允许请勿转载。
THE END