@Test
public void testHash(){

	String str = "hellohello_helloh_ellohello";
	System.out.println("hash: " + str.hashCode());
	boolean voted = false;
	System.out.println("voted: " + (voted |=true));
	voted = false;
	System.out.println("voted: " + (voted |=false));
	voted = false;
	System.out.println("voted: " + (voted &=true));
	voted = false;
	System.out.println("voted: " + (voted &=true));
	str = "ntyg168@163.com";
	System.out.println("substring: " + str.length());
}