use data from external webpage to display response

[davedmd]

Does anyone know how you can possibly read an external webpage or search it for an exact expression or image. If it exists return an alertbox "found, otherwise "not found"
Javascript would be great. I found this example but cant seem to make it work.

URL url = new URL("http://factfinder.cens us.gov/home/saff/main.html?_lang =en");
HttpURLConnecti on conn = (HttpURLConnect ion) url.openConnect ion();
BufferedReader rd = new BufferedReader( new InputStreamRead er(conn.getInpu tStreamReader() );

String line;
while(line=rd.r eadLine() != null) {
response += line;
}
if (line == "2006 County Business Patterns"){
alert ('found');
}else{
alert ('not found');
}
</script>

any examples or help would be appreciated...

[r035198x]

You are not mixing Java and Javascript are you?

[Nepomuk]

You are not mixing Java and Javascript are you?

The code certainly looks like Java, so I suspect the OP just made a mistake calling it JavaScript.
Just in case, here's what they are: JavaScript and Java

To answer the OP's question, your error is in the line[code=java]if (line == "2006 County Business Patterns"){...[/code]You don't compare Strings like that. Use this instead:[code=java]if (line.equals("2 006 County Business Patterns")){...[/code]
Greetings,
Nepomuk

[JosAH]

There are a couple of errors in there:

1) that code is Java (except for that 'alert()' method?)
2) you compare Strings using its equals() method, not by using ==
3) your code only checks the last line
4) appending Strings like that is highly inefficient; use a StringBuilder.

kind regards,

Jos

[davedmd]

This stuff is too complicated. I was hoping there was a simple javascript one could build to look up data, but java, javascript... just too much to deal with.
maybe someone one day will figure out a simple web page look up script
thanks for the help........... .....