Listing 11: head_sub_tail_NM_Demo.java
import java.util.*;
public class head_sub_tail_NM_Demo{
public static void seeEntries(SortedMap SM,String info)
{
//see the entries
System.out.println(info);
Iterator i=SM.keySet().iterator();
while(i.hasNext()){
Double key=(Double)i.next();
System.out.println("Name:"+SM.get(key)+"\tNote:"+key);
}
}
public static void main(String args[]) {
//create a SortedMap -> tree structure
SortedMap SM=new TreeMap();
//create a NavigableMap
NavigableMap NM=(NavigableMap)(SM);
//populate the NM
NM.put(8.09,"Hydro");
NM.put(7.25,"George");
NM.put(9.00,"Any");
NM.put(10.00,"Martin");
NM.put(5.64,"Wallace");
Double test=new Double(9.0);
//headMap - exclusive
System.out.println("----------------------------------------");
SortedMap SMheadMapE=NM.headMap(9.0);
seeEntries(SMheadMapE,"headMap exclusive:");
System.out.println("----------------------------------------");
//headMap - inclusive
System.out.println("----------------------------------------");
SortedMap SMheadMapI=NM.headMap(9.0,true);
seeEntries(SMheadMapI,"headMap inclusive:");
System.out.println("----------------------------------------");
//subMap - (inclusive,exclusive)
System.out.println("----------------------------------------");
SortedMap SMsubMapIE=NM.subMap(7.25,9.0);
seeEntries(SMsubMapIE,"subMap (inclusive,exclusive):");
System.out.println("----------------------------------------");
//subMap - (inclusive,inclusive)
System.out.println("----------------------------------------");
SortedMap SMsubMapII=NM.subMap(7.25,true,9.0,true);
seeEntries(SMsubMapII,"subMap (inclusive,inclusive):");
System.out.println("----------------------------------------");
//subMap - (exclusive,exclusive)
System.out.println("----------------------------------------");
SortedMap SMsubMapEE=NM.subMap(7.25,false,9.0,false);
seeEntries(SMsubMapEE,"subMap (exclusive,exclusive):");
System.out.println("----------------------------------------");
//subMap - (exclusive,inclusive)
System.out.println("----------------------------------------");
SortedMap SMsubMapEI=NM.subMap(7.25,false,9.0,true);
seeEntries(SMsubMapEI,"subMap (exclusive,inclusive):");
System.out.println("----------------------------------------");
//tailMap - inclusive
System.out.println("----------------------------------------");
SortedMap SMtailMapI=NM.tailMap(9.0);
seeEntries(SMtailMapI,"tailMap inclusive:");
System.out.println("----------------------------------------");
//tailMap - exclusive
System.out.println("----------------------------------------");
SortedMap SMtailMapE=NM.tailMap(9.0,false);
seeEntries(SMtailMapE,"tailMap exclusive:");
System.out.println("----------------------------------------");
}
}
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