The following example demonstrates how to use the keys() method of the Hashtable class to traverse the output key values:
/*
author by w3cschool.cc
Main.java
*/
import java.util.Enumeration;
import java.util.Hashtable;
public class Main {
public static void main(String[] args) {
Hashtable ht = new Hashtable();
ht.put("1", "One");
ht.put("2", "Two");
ht.put("3", "Three");
Enumeration e = ht.keys();
while (e.hasMoreElements()){
System.out.println(e.nextElement());
}
}
}The output result of running the above code is:
3 2 1
above It is a Java example - traversing the key value content of HashTable. For more related content, please pay attention to the PHP Chinese website (m.sbmmt.com)!