YouTipCollection Hashtable Key
# Java Example - Traversing Keys and Values of a HashTable
[ Java Example](#)
The following example demonstrates how to use the `keys()` method of the `Hashtable` class to traverse and output the keys:
## Main.java File
```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 of the above code is:
3
2
1
[ Java Example](#)