Program
import java.util.*;
class TestMap{
public static void main(String args[]){
HashMap<String,String>tel=new HashMap<String,String>();
tel.put("jijo","8129894644");
tel.put("Test1","9467859623");
tel.put("hai","7859642235");
tel.put("Cyril","7689342686");
String n=tel.get("Test1");
System.out.println(n);
Set<String> keys=tel.keySet();
for(String key:keys){
System.out.println(key);
}
}
}
Output
D:\a5518\day9>javac TestMap.java
D:\a5518\day9>java TestMap
9467859623
Cyril
hai
Test1
jijo
D:\a5518\day9>