public boolean equals(Man man) {
       return this.dnaCode ==  man.dnaCode;
   }

s.equals(s2)
s.equals("text")
equalsIgnoreCase()
(s1 == s2.intern())
------------
s.length()==s2.length()
------------
	BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));

	String s = reader.readLine();
	int number1 = Integer.parseInt(s);