Mega Code Archive
What you can do with a TreeMap
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// : c11:SortedMapDemo.java
//What you can do with a TreeMap.
//From 'Thinking in Java, 3rd ed.' (c) Bruce Eckel 2002
//www.BruceEckel.com. See copyright notice in CopyRight.txt.
import java.util.Iterator;
import java.util.TreeMap;
public class SortedMapDemo {
public static void main(String[] args) {
TreeMap sortedMap = new TreeMap();
sortedMap.put("Adobe", "Mountain View, CA");
sortedMap.put("IBM", "White Plains, NY");
sortedMap.put("Learning Tree", "Los Angeles, CA");
sortedMap.put("Microsoft", "Redmond, WA");
sortedMap.put("Netscape", "Mountain View, CA");
sortedMap.put("O'Reilly", "Sebastopol, CA");
sortedMap.put("Sun", "Mountain View, CA");
System.out.println(sortedMap);
Object low = sortedMap.firstKey(), high = sortedMap.lastKey();
System.out.println(low);
System.out.println(high);
Iterator it = sortedMap.keySet().iterator();
for (int i = 0; i <= 6; i++) {
if (i == 3)
low = it.next();
if (i == 6)
high = it.next();
else
it.next();
}
System.out.println(low);
System.out.println(high);
System.out.println(sortedMap.subMap(low, high));
System.out.println(sortedMap.headMap(high));
System.out.println(sortedMap.tailMap(low));
}
} ///:~
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