gistfile1.txt

package test; 
 
public class Test {
	public static final Empty EMPTY = new Empty();	
	
	public static void main(String[] args) {
		
		// first test instantiates the Empty class
		Empty first_test = EMPTY;
		System.out.println(String.format("inFirst test before changing state: %b", first_test.isLoading()));
		
		// first test sets the state
		first_test.setState();		
				
		// now second test does not instantiate anymore, the EMPTY is static final, and already created
		// it just returns previously created instance of Empty class with poluted state.
		Empty second_test = EMPTY;
		System.out.println(String.format("sec_test, state should be false but is: %b", second_test.isLoading()));		
	}
}



package test;

public class Empty {
	private boolean mState = false;
	
	public boolean isLoading() {
		return mState;
	}
	
	public void setState() {
		mState = true;		
	}
}