Which are valid/invalid and if so why?
String s = "\n";
String s1="\r";
String s2= "\u000a";
String s3 ="\u000d";
String s4="'\u0041'";
String s5="\u0041";
String s6 ="\uD7AF";
String s = "\n";
String s1="\r";
String s2= "\u000a";
String s3 ="\u000d";
String s4="'\u0041'";
String s5="\u0041";
String s6 ="\uD7AF";