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Java Program to get Tail Map from TreeMap
<p>To get Tail Map from TreeMap, let us first create a TreeMap and set key-value pair −</p><pre class="result notranslate">TreeMap<String, String>tMap = new TreeMap<String, String>(); tMap.put("1", "A"); tMap.put("2", "B"); tMap.put("3", "C"); tMap.put("4", "D"); tMap.put("5", "E"); tMap.put("6", "F"); tMap.put("7", "G");</pre><p>Now, let’s say you need to get the tailmap from 2 i.e. all the key-value pairs after 2. For that, use the method tailMap() −</p><pre class="result notranslate">SortedMapmap = tMap.tailMap("2");</pre><h2>Example</h2><p><a class="demo" href="http://tpcg.io/rNAbDv" rel="nofollow" target="_blank"> Live Demo</a></p><pre class="prettyprint notranslate">import java.util.SortedMap; import java.util.TreeMap; public class Demo { public static void main(String[] args) { TreeMap<String, String>tMap = new TreeMap(); tMap.put("1", "A"); tMap.put("2", "B"); tMap.put("3", "C"); tMap.put("4", "D"); tMap.put("5", "E"); tMap.put("6", "F"); tMap.put("7", "G"); tMap.put("8", "H"); tMap.put("9", "I"); tMap.put("10", "J"); SortedMap map = tMap.tailMap("2"); System.out.println("Sub Map = " + map); map = tMap.tailMap("8"); System.out.println("Sub Map = " + map); map = tMap.tailMap("1"); System.out.println("Sub Map = " + map); } }</pre><h2>Output</h2><pre class="result notranslate">Sub Map = {2=B, 3=C, 4=D, 5=E, 6=F, 7=G, 8=H, 9=I} Sub Map = {8=H, 9=I} Sub Map = {1=A, 10=J, 2=B, 3=C, 4=D, 5=E, 6=F, 7=G, 8=H, 9=I}</pre>
Updated on 30-Jul-2019 22:30:25
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