/* package whatever; // don't place package name! */
 
import java.util.*;
import java.lang.*;
import java.io.*;
 
/* Name of the class has to be "Main" only if the class is public. */
class HashCode
{
	public static void main (String[] args) throws java.lang.Exception
	{
		HashCode x = new HashCode();
		Set<Sample> samples = new HashSet<>();
		samples.add(x.new Sample("Goofy"));
		samples.add(x.new Sample("Donald"));
		System.out.println(samples.size()); //Output is 2
	}
 
	private class Sample {
		private String name;
 
		public Sample(String name) {
			this.name = name;
		}
 
		public int hashCode() {
			return 1;
		}
 
		public boolean equals(Object o) {
			return name.equals(((Sample)o).name);
		}
	}
}

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