HDOJ/HDU 1088 Write a simple HTML Browser(HTML字符串)_html/css

HDOJ/HDU 1088 Write a simple HTML Browser(HTML字符串)_html/css_WEB-ITnose

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Libérer： 2016-06-24 11:16:50

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Problem Description
If you ever tried to read a html document on a Macintosh, you know how hard it is if no Netscape is installed.
Now, who can forget to install a HTML browser? This is very easy because most of the times you don’t need one on a MAC because there is a Acrobate Reader which is native to MAC. But if you ever need one, what do you do?
Your task is to write a small html-browser. It should only display the content of the input-file and knows only the html commands (tags)
which is a linebreak and

which is a horizontal ruler. Then you should treat all tabulators, spaces and newlines as one space and display the resulting text with no more than 80 characters on a line.

Input
The input consists of a text you should display. This text consists of words and HTML tags separated by one or more spaces, tabulators or newlines.
A word is a sequence of letters, numbers and punctuation. For example, “abc,123” is one word, but “abc, 123” are two words, namely “abc,” and “123”. A word is always shorter than 81 characters and does not contain any ‘’. All HTML tags are either
or

Output
You should display the the resulting text using this rules:
. If you read a word in the input and the resulting line does not get longer than 80 chars, print it, else print it on a new line.
. If you read a
in the input, start a new line.
. If you read a

in the input, start a new line unless you already are at the beginning of a line, display 80 characters of ‘-’ and start a new line (again).
The last line is ended by a newline character.

Sample Input

Hallo, dies ist eine ziemlich lange Zeile, die in Htmlaber nicht umgebrochen wird.<br>Zwei <br> <br> produzieren zwei Newlines. Es gibt auch noch das tag <hr> was einen Trenner darstellt.Zwei <hr> <hr> produzieren zwei Horizontal Rulers.Achtung       mehrere Leerzeichen irritierenHtml genauso wenig wiemehrere Leerzeilen.

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Sample Output

Hallo, dies ist eine ziemlich lange Zeile, die in Html aber nicht umgebrochenwird.Zweiproduzieren zwei Newlines. Es gibt auch noch das tag--------------------------------------------------------------------------------was einen Trenner darstellt. Zwei----------------------------------------------------------------------------------------------------------------------------------------------------------------produzieren zwei Horizontal Rulers. Achtung mehrere Leerzeichen irritieren Htmlgenauso wenig wie mehrere Leerzeilen.

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注意点：（1） 每行最多80个字符，如果加上最后一个单词大于80，则最后一个单词移到下一行。（2） <hr>如果处于当前行字符数等于0的情况，则直接输出，否则先输出回车，在输出<hr>,只含有<br>和<hr>标签(3) 文章最后要有一个回车

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equals表示的相等，是指向对象的相等；而compareTo的相等，是内容的相等。
不过其中有一个问题，很奇怪~我用equals老是PE，用compareTo就没问题了~~~弄不懂~

代码注释标识了！
有知道原因的大牛，请在评论区指点下，谢啦~

import java.util.Scanner;public class Main{    public static void main(String[] args) {        Scanner sc = new Scanner(System.in);        String result = new String("");        String str;        while (sc.hasNext()) {            str = sc.next();            if ("".equals(str)) {                continue;            }            if ("<br>".equals(str)) {                System.out.println(result);                result = "";            } else if ("<hr>".equals(str)) {                if (result.compareTo("")!=0) {                // if (!"".equals(result)) {//会WA！！！原因，我也不清楚！！！！                    System.out.println(result);                }                gong.print();                result = "";            } else {                String temp = result;                if ((temp + " " + str).length() < 80) {                    if (!"".equals(result)) {                        result += " " + str;                    } else {                        result = str;// 每一行的第一个输入                    }                } else {                    System.out.println(result);                    result = str;                }            }        }        if (!("".equals(result))) {            System.out.println(result);        }    }}class gong {    static void print() {        for (int i = 0; i < 80; i++)            System.out.print("-");        System.out.println();    }}

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