computer science area (1 Viewer)

[Loppan]

It's me again with a problem

Here's a bit of code. The problem that I have is that it doesn't print out the books of a certain writer.

public void findWriter(String w) {

Collator co = Collator.getInstance();
co.setStrength(Collator.PRIMARY);
System.out.println("Books that" + w + " written:");
for (int i = 0; i < antal; i++) {
if (co.compare(reg.findWriter(),w) == 0) {
System.out.println(reg);
}
}


antal are the number of books in the array. reg is the array.

 

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[Martin]

Well assuming the method findWriter() returns the correct string, I see no reason why this should not work. The only concern that comes to mind is you want to eliminate any possible whitespaces that could have been stored inadvertently. You could accomplish that by running trim() on each of the strings before they are compared, ie..

if (co.compare(reg.findWriter().trim(),w.trim()) == 0) {
System.out.println(reg);
}

 

[Loppan]

++ [ originally posted by Loppan ] ++
It's me again with a problem

Here's a bit of code. The problem that I have is that it doesn't print out the books of a certain writer.

public void findWriter(String w) {

Collator co = Collator.getInstance();
co.setStrength(Collator.PRIMARY);
System.out.println("Books that" + w + " written:");
for (int i = 0; i < antal; i++) {
if (co.compare(reg.returnWriter(),w) == 0) {
System.out.println(reg);
}
}


antal are the number of books in the array. reg is the array.

public String returnWriter() {
return writer;
}

 

[Martin]

It all looks alright to me.. :undecide:

 

[Loppan]

I used the skip.Line() wrong in the main class.

Here's another problem:

C:\Program\Xinox Software\JCreator LE\MyProjects\cd5450\Lab5\BokProjekt\Projektuppgift\Bokhylla.java:114: cannot resolve symbol
symbol : method taBortBok (Bok)
location: class Bokregister
r.remove(b1);


Class Bok:

public void removeBok(Bok b) {
b = null;
}


Main:

{
System.out.print("What bok? Number xxxx-xxxxx: ");
Std.in.skipLine();
String isbn=Std.in.readLine();
Bok b1=r.findIsbn(isbn);
System.out.print("Remove" +b1);
svar=(char)Std.in.readChar();
if (svar=='j') {
r.remove(b1);
}

 

[Martin]

++ [ originally posted by Loppan ] ++
C:\Program\Xinox Software\JCreator LE\MyProjects\cd5450\Lab5\BokProjekt\Projektuppgift\Bokhylla.java:114: cannot resolve symbol
symbol : method taBortBok (Bok)
location: class Bokregister

I don't see any method called taBortBok in your code.

 

[Loppan]

I was tired when I was doing that one :embarass:

Here is another problem. I want to find a number. I have declared it as a String. I have for ex. this number 1887-87897. I don't know how to find it. I have done this method but it's probably wrong.

public Bok findNumber(String n) {

Collator co = Collator.getInstance();
co.setStrength(Collator.PRIMARY);

for (int i=0;i<antal;i++) {
if (co.compare(reg.readNumber(),n) == 0) {
System.out.println(reg);
return reg;
}
}
return null;
}

 

[Anders]

Hi nerds!

I've got a little problem... please help me!

I need a search form that can search in a txt file...

If you don't know what the hell I'm talking about, let me know and I'll go in to details.

 

[Dj Juve]

first u partronize them, then ask for help...i luv it :thumb: