CODEWITHSUNDEEP
javaandroidstringsubstring
user1284567
user1284567

Reputation: 141

How to pull out sub-string from string (Android)?

I'm trying to pull out sub-string from a string using java.Util.Scan

The sub-string is between "<TD class=MoreB align=center>" and "</TD>" in the original string

This is the code:

public static String pullStringOut(String str)
{
    String stringer = null;

    Scanner scanner = new Scanner(str);
    scanner.findInLine("<TD class=MoreB align=center>");

    while (scanner.hasNext() && scanner.next() != "</TD>")
    {
        stringer+= " " + (scanner.next());
    }

    return stringer;
}

but it's not working well.

From the original string:

"<TD class=MoreB align=center>TextTextTextText</TD></TR></TABLE> }"

I get the following result:

"TextTextTextText</TD></TR></TABLE> }"

Instead of the expected

"TextTextTextText"

Upvotes: 0

Views: 526

Answers (3)

Imran Rana
Imran Rana

Reputation: 11899

Here is an alternate solution:

String tvt ="<TD class=MoreB align=center>TextTextTextText</TD></TR></TABLE> }" //your original string
                String s ="<TD class=MoreB align=center>";
                String f= "</TD>";
                int sindex =tvt.indexOf(s);
                int findex =tvt.indexOf(f);
                String fs = "";
                if(sindex!=-1 && findex!=-1)
                fs=tvt.substring(sindex+s.length(), findex); // your desired substring

Upvotes: 0

hmjd
hmjd

Reputation: 122001

A few problems:

  • scanner.next() != "</TD>" will always be true as the operands will not be the same object. Use !scanner.next().equals("</TD>"). From Reference Equality Operators == and != section of the JLS:

    The result of != is false if the operand values are both null or both refer to the same object or array; otherwise, the result is true.

  • scanner.next() is being called twice on each iteration of the loop. Change to:

    String line;
while (scanner.hasNext() && !(line = scanner.next()).equals("</TD>"))
{
    stringer+= " " + line;
}

Upvotes: 1

eric.itzhak
eric.itzhak

Reputation: 16072

You can use a Regex Expresssion.

Something like :

    Pattern p = Pattern.compile("/\<TD class=MoreB align=center>(.*)\<\/td\>/"); 
Matcher m = p.matcher(str); 
while(m.find()) { 

  //do whatever you want here
 }

(not tested)

Upvotes: 0

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