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HashtableTest.java
import java.util.*;
public class HashtableTest {
public static void main(String[] args) {
Hashtable h = new Hashtable();
h.put("Name", new String("jabook"));
h.put("Age", new Integer(27));
h.put("Height", new Double(175.5));
System.out.println(h.size());
h.clear();
System.out.println("====================");
System.out.println(h.size());
}
}
D:\javaclass\111>javac HashtableTest.java
D:\javaclass\111>java HashtableTest
3
====================
0
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