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[java] String help

Started by The C modest god Apr 8, 2006 at 6:32 AM 2 replies 850+ views

Original Post

112

Apr 8, 2006 at 6:32 AM

I have a String with some lines and words in it. Lines are seprated by "\n" and words are seperated by one or more ' '. How do I read a line from a String? So I need a function the from string it will return me the first line, and maybe another function that will return me the String without the first line so I could read all the lines. From a line, how do I read a single word? and how do I read the line without the first word? I looked into StringBuffer and StringReader but didnt find anything that would help me with this problem. How can I implement this, have any idea? Thanks in advance.

haegarr

271

haegarr

Apr 8, 2006 at 6:46 AM

You could split the string into pieces like here

final String[] linesOfString = string.split("[\n]");for(int lineIndex=0; lineIndex<linesOfString.length; ++lineIndex) {   final String[] wordsOfLine = linesOfString[lineIndex].split("[ ]");   for(int wordIndex=0; wordIndex<wordsOfLine.length; ++wordIndex) {      // do something with wordsOfLine[wordIndex]   }}

You could furthur use the java.util.StringTokenizer class in a similar fashion as above.

Btw: java.lang.StringBuffer (and java.lang.StringBuilder, what is to be preferred in most cases since Java 1.5) are for making strings, not for parsing them.

The C modest god

Author

112

The C modest god

Apr 8, 2006 at 6:59 AM

Thanks.
I have another question, how do I create a popup window (not menu!).
Like when an error occurs in windows, you have a window you need to press send or close and you cant press the window that created the error window.
How do I do that in java?

Epo35

Apr 8, 2006 at 10:48 AM

For the popup window, you can make your own or use JOptionPane.

http://java.sun.com/j2se/1.4.2/docs/api/javax/swing/JOptionPane.html

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