Testing the shallow copy of an object to see if the second map keeps the original objects around after the first map is cleared. Turns out, the second map does in fact keep the objects around!

TestShallowCopy.java

import java.util.Map;
import java.util.HashMap;

public class TestShallowCopy {
	public static void main(String[] args) {
		Map<String, Integer> a = new HashMap<String, Integer>();
		a.put("TEST", 1);
		
		Map<String, Integer> b = new HashMap<String, Integer>(a);
		
		a.clear();
		
		System.out.println("TEST: "+b.get("TEST"));
		System.out.println("A-size: "+a.size());
		System.out.println("B-size: "+b.size());
	}
}