Size of TreeSet can be find by size() method. In size method, it will return value in integer.
Example of finding size in TreeSet in Java
TreeSet<String> ts=new TreeSet<String>();
ts.add("b");
ts.add("a");
ts.add("d");
ts.add("c");
int sizeOfTreeSet=ts.size();
System.out.println("Size of TreeSet :"+sizeOfTreeSet);
Output
Size of TreeSet :4
Tags: Collections
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