Question

How to remove an element from TreeSet in Java

Answer 1

package javaapplication1;

import java.util.TreeSet;

public class JavaApplication1 {

    public static void main(String[] args) {

        TreeSet treeSet = new TreeSet();
        
        treeSet.add("Java");
        treeSet.add("C");
        treeSet.add("C++");
        treeSet.add("C#");
        treeSet.add("PHP");
        treeSet.add("JavaScript");
        treeSet.add("Python");

        boolean b = treeSet.remove("PHP");
        System.out.println(b);
   
        System.out.println(treeSet);
    }
}
 
/*

run:

true
[C, C#, C++, Java, JavaScript, Python]

*/

 

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Answer 2

package javaapplication1;

import java.util.TreeSet;

public class JavaApplication1 {

    public static void main(String[] args) {

        TreeSet treeSet = new TreeSet();
        
        treeSet.add(new Integer("1"));
        treeSet.add(new Integer("2"));
        treeSet.add(new Integer("3"));
        treeSet.add(new Integer("4"));
        treeSet.add(new Integer("5"));

        boolean b = treeSet.remove(new Integer("3"));
        System.out.println(b);
   
        System.out.println(treeSet);
    }
}
 
/*

run:

true
[1, 2, 4, 5]

*/

 

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