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Create a TreepMap in Java and add elements
Let us create TreeMap in Java. It stores unique elements in ascending order −
TreeMap<Integer,String> m = new TreeMap<Integer,String>();
Now let us add some elements −
m.put(1,"PHP"); m.put(2,"jQuery"); m.put(3,"JavaScript"); m.put(4,"Ruby"); m.put(5,"Java"); m.put(6,"AngularJS"); m.put(7,"ExpressJS");
The following is an example to create a TreeMap −
Example
import java.util.*; public class Demo { public static void main(String args[]) { TreeMap<Integer,String> m = new TreeMap<Integer,String>(); m.put(1,"PHP"); m.put(2,"jQuery"); m.put(3,"JavaScript"); m.put(4,"Ruby"); m.put(5,"Java"); m.put(6,"AngularJS"); m.put(7,"ExpressJS"); for(Map.Entry e:m.entrySet()){ System.out.println(e.getKey()+" "+e.getValue()); } } }
Output
1 PHP 2 jQuery 3 JavaScript 4 Ruby 5 Java 6 AngularJS 7 ExpressJS
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