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  1.  
  2.  
  3. import java.util.*;
  4. import java.lang.*;
  5. import java.io.*;
  6.  
  7. class MyBasicTreeset {
  8.    public static void main(String a[]){
  9.        TreeSet<String> ts = new TreeSet<String>();
  10.         ts.add("one");
  11.         ts.add("two");
  12.         ts.add("three");
  13.         System.out.println("Elements: "+ts);
  14.         //check is set empty?
  15.         System.out.println("Is set empty: "+ts.isEmpty());
  16.         //delete all elements from set
  17.         ts.clear();
  18.         System.out.println("Is set empty: "+ts.isEmpty());
  19.         ts.add("one");
  20.         ts.add("two");
  21.         ts.add("three");
  22.         System.out.println("Size of the set: "+ts.size());
  23.         //remove one string
  24.         ts.remove("two");
  25.         System.out.println("Elements: "+ts);
  26.     }
  27. }
Success #stdin #stdout 0.04s 4386816KB
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stdin
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Standard input is empty
stdout
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Elements: [one, three, two]
Is set empty: false
Is set empty: true
Size of the set: 3
Elements: [one, three]
https://ideone.com/5DOlWL
language:
Java (HotSpot 12)
created:
7 years ago
visibility:
secret

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