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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
Updated on: 30-Jul-2019
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