Question

How to get the lowest key stored in TreeMap in Java

Answer 1

package javaapplication1;

import java.util.TreeMap;

public class JavaApplication1 {

    public static void main(String[] args) {

        TreeMap treeMap = new TreeMap();
        
        treeMap.put("1", "Java");
        treeMap.put("2", "C");
        treeMap.put("3", "C++");
        treeMap.put("4", "C#");
        treeMap.put("5", "PHP");
        treeMap.put("6", "JavaScript");

        System.out.println(treeMap.firstKey());
    }
}
 
/*

run:

1

*/

 

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