JM Chapter 10 #14

Write a method that checks whether a string has matching HTML tags. If they match, return the string without the tags. Otherwise, return the string as is.

JM Chapter 10 #14

"<Hello>WORLD</Hello>", "WORLD"
"<b>I_Like_Pie/<Cake></b>", "I_Like_Pie/<Cake>"
"<b>HelloThere</c>", "<b>HelloThere</c>"
"", ""
"Hi", "Hi"
"Ender'sGame<b></b>", "Ender'sGame<b></b>"
"<b></b>", ""
"<b></b>HI", "<b></b>HI"
"CircleOfLife/", "CircleOfLife/"
"<kop>POP</kop>", "POP"
"</kop>TOP<kop>", "</kop>TOP<kop>"
"<bookthief>1984</bookthief>", "1984"
"<J><<<<<</J>", "<<<<<"
"<J><<<<<<J>", "<J><<<<<<J>"
"YOUDIDIT!!", "YOUDIDIT!!"

public String removeTag(String str) {
	if (str.length() < 4) {
		return str;
	}
	if (str.indexOf('<') == 0 && str.lastIndexOf('>') == str.length() - 1) {
		int i = str.indexOf('>');
		int j = str.lastIndexOf('<');
		if (("</" + str.substring(1, i + 1)).equals(str.substring(j))) {
			return str.substring(i+1, j);
		}
	}
	return str;
}