Question

How to remove all values from 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");
        treeMap.put("7", "Python");

        System.out.println(treeMap.size());
        
        treeMap.clear();
   
        System.out.println(treeMap.size());
    }
}
 
/*

run:

7
0

*/

 

70+ SQL courses for beginners and professionals