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import java.util.Iterator;
import java.util.LinkedHashMap;
import java.util.Set;
public class Main {
public static void main(String[] args) {
LinkedHashMap<String,String> lHashMap = new LinkedHashMap<String,String>();
lHashMap.put("1", "One");
lHashMap.put("2", "Two");
lHashMap.put("3", "Three");
Set st = lHashMap.keySet();
Iterator itr = st.iterator();
while (itr.hasNext()){
System.out.println(itr.next());
}
st.remove("2");
boolean blnExists = lHashMap.containsKey("2");
System.out.println(blnExists);
}
}
/*
1
2
3
false
*/
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