Question

How to get the first key value from TreeMap in Java

Answer 1

import java.util.TreeMap;
 
public class MyClass {
    public static void main(String args[]) {
        TreeMap<Integer, String> treemap = new TreeMap<Integer, String>();
        
        treemap.put(4, "java");
        treemap.put(2, "c++");
        treemap.put(5, "python");
        treemap.put(3, "c#");
        
        if (!treemap.isEmpty()){
            System.out.println(treemap.firstEntry());
        }        
    }
}
  
  
  
/*
run:
  
2=c++
 
*/

 

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