Remove TreeSet elements

We can use remove() method of TreeSet to remove elements from TreeSet collection

boolean remove(Object obj)


Example

  1. import java.util.*;
  2. public class TreeSetRemoveExample {
  3. public static void main(String args[]) {
  4.  
  5. TreeSet<String> ts = new TreeSet<String>();
  6.  
  7. ts.add(“java”);
  8. ts.add(“c”);
  9. ts.add(“c++);
  10. System.out.println("TreeSet before removing elements”);
  11. System.out.println(ts);
  12. ts.remove(“java”);
  13. System.out.println("TreeSet after removing elements”);
  14. System.out.println(ts);
  15. }
  16. }
import java.util.*;
public class TreeSetRemoveExample {
public static void main(String args[]) {

TreeSet<String> ts = new TreeSet<String>();

ts.add(“java”);
ts.add(“c”);
ts.add(“c++”);
System.out.println("TreeSet before removing elements”);
System.out.println(ts);
ts.remove(“java”);
System.out.println("TreeSet after removing elements”);
System.out.println(ts);
}
}


Removing all elements at once

We can use clear() method of TreeSet to remove all elements in one go

Example

  1. import java.util.*;
  2. public class TreeSetRemoveAllExample {
  3. public static void main(String args[]) {
  4.  
  5. TreeSet<String> ts = new TreeSet<String>();
  6.  
  7. ts.add(“java”);
  8. ts.add(“c”);
  9. ts.add(“c++);
  10. System.out.println("TreeSet before removing all elements”);
  11. System.out.println(ts);
  12. ts.clear();
  13. System.out.println("TreeSet after removing all elements”);
  14. System.out.println(ts);
  15. }
  16. }
import java.util.*;
public class TreeSetRemoveAllExample {
public static void main(String args[]) {

TreeSet<String> ts = new TreeSet<String>();

ts.add(“java”);
ts.add(“c”);
ts.add(“c++”);
System.out.println("TreeSet before removing all elements”);
System.out.println(ts);
ts.clear();
System.out.println("TreeSet after removing all elements”);
System.out.println(ts);
}
}

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Founder of javainsimpleway.com
I love Java and open source technologies and very much passionate about software development.
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I have given all the examples as simple as possible to understand for the beginners.
All the code posted on my blog is developed,compiled and tested in my development environment.
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