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Anup Bishnoi
Guest
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 Posted: Wed Feb 22, 2006 8:12 pm Post subject: to break a string into words stored in array |
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can someone please tell me why this code is giving a runtime error (no
compilation error)
Error :
| Quote: | "J:\Programs\Java\jdk1.5.0\bin\java.exe" StringSort
java.lang.NoSuchMethodError: main |
Exception in thread "main"
----------------------------------------------------
The program is this file StringSort.java :
public class StringSort {
public static void main() {
String texT = "To be or not to be, that is the question;"
+"Whether `tis nobler in the mind to suffer"
+" the slings and arrows of outrageous fortune,"
+" or to take arms against a sea of troubles,"
+" and by opposing end them?";
String[] words;
int howManyWords = texT.length();
words = new String[howManyWords];
int a=0;
int k=0;
for (int i=0 ; i<texT.length() ; i++) {
if (texT.charAt(i)==' ') {
words[k++]=texT.substring(a,i);
System.out.println(words[k-1]);
while(texT.charAt(i)==' ') {
a=i++;
}
}
}
}
}
plz help |
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Anup Bishnoi
Guest
|
| Posted: Wed Feb 22, 2006 8:12 pm Post subject: Re: to break a string into words stored in array |
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Anup Bishnoi wrote:
| Quote: | can someone please tell me why this code is giving a runtime error (no
compilation error)
Error :
"J:\Programs\Java\jdk1.5.0\bin\java.exe" StringSort
java.lang.NoSuchMethodError: main
Exception in thread "main"
----------------------------------------------------
The program is this file StringSort.java :
public class StringSort {
public static void main() {
String texT = "To be or not to be, that is the question;"
+"Whether `tis nobler in the mind to suffer"
+" the slings and arrows of outrageous fortune,"
+" or to take arms against a sea of troubles,"
+" and by opposing end them?";
String[] words;
int howManyWords = texT.length();
words = new String[howManyWords];
int a=0;
int k=0;
for (int i=0 ; i<texT.length() ; i++) {
if (texT.charAt(i)==' ') {
words[k++]=texT.substring(a,i);
System.out.println(words[k-1]);
while(texT.charAt(i)==' ') {
a=i++;
}
}
}
}
}
plz help
|
inserting (String args[]) as argument in main() solved the problem but
please tell me what difference did it make? |
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Paul Hamaker
Guest
|
| Posted: Wed Feb 22, 2006 9:12 pm Post subject: Re: to break a string into words stored in array |
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main() and main( String[] )
are two different methods. A method is identified by its name plus
parameters. Method overloading.
---------------
Paul Hamaker, SEMM, teaching ICT since 1987
http://javalessons.com |
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Rob Skedgell
Guest
|
| Posted: Wed Feb 22, 2006 9:12 pm Post subject: Re: to break a string into words stored in array |
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Anup Bishnoi wrote:
| Quote: |
Anup Bishnoi wrote:
can someone please tell me why this code is giving a runtime error
(no compilation error)
Error :
"J:\Programs\Java\jdk1.5.0\bin\java.exe" StringSort
java.lang.NoSuchMethodError: main
Exception in thread "main"
----------------------------------------------------
The program is this file StringSort.java :
public class StringSort {
      public static void main() {
|
[...]
| Quote: |
inserting (String args[]) as argument in main() solved the problem but
please tell me what difference did it make?
|
In order to run the class, the JVM invokes a main method which accepts a
single array of strings, and can be declared as:
public static void main(String[] args)
or
public static void main(String...)
(Java Language Specification v3.0 s12.1.14)
If you declare it as "public static void main()" it can't accept an
array of strings, or anything else as parameter(s).
--
Rob Skedgell <rob+news (AT) nephelococcygia (DOT) demon.co.uk>
GnuPG/PGP: 7DA3 1579 C0DD 8748 C05A B984 E2A2 3234 D14B 6DD7 |
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Rajah
Guest
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| Posted: Wed Feb 22, 2006 9:12 pm Post subject: Re: to break a string into words stored in array |
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Anup,
There's a nifty java function to split up a string into words. You may
replace everything after the texT definition with:
String [] words = texT.split("\\s");
for (int i=0; i<words.length; i++) {
System.out.println(words[i]);
}
And you'll get the final "them?" as well. The split("\\s") has the
effect of dividing the string up at spaces and placing them into the
words array. |
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