Lets say I have a text file, in a local or remote location. I want to select it with a file picker (standard Windows browser seleccion). Once I have that selected, I want to click a send button. This send will download the text file from whereever it is at then FTP it over to a server. After that, I want to call a web service.
Lets start from scratch. What is the best way to do the selecting the file from anywhere? From anywhere I mean a Windows shared computer but it should be able to get from another FTP location.
Sometimes I update my web service JAR by deleting the old one (waiting for the undeploy message to appear on the console) and putting the new one (and seeing the deploy message) and when I call it, it gives a heap size error. I have to restart the PC and from then on, it works perfectly 9999999999 times over when I call it.
OK, Im seeing a comment saying "There should be no change to the pointer we were passed"
Im THINKING you are passing code from C to Java.
So the issue with this is a that in C there are no objects while in Java there is so you have to sort of change the orientation and method of programming.
But first lets confirm that: Are you porting C code to Java?
Anyways thats it. Thank you JamesCherrill as you are the only one that truely helped.
Also, I deal almost on a daily base with PHP, JS, C#, Java, shell scripting.....and on top of that I hate programing so these elementary mistakes slip me.
What did you do with the String that the format method returns? I KNOW you are a better Java programmmer than this.
Another reason why Java is ****; I thought It automatically changed it (which would be logic but then again Java isnt logic...), it wasnt suppose to return another String....
Also, if you basically told me what is the elementary mistake in the code, this thread would end. I got the symbol, the decimal thing working.......pretty much nothing else to do except display two decimal positions always.
I'm worried. This thread has become very unheathy - just look at the number and kind of questions that are being asked. I know you have the Java skills to answer many of them yourself, and I don't think I'm providing the right kind of help any more.
So this may br my last post in the thread (maybe)... Yes. Answered. What makes you think that that code will do anything other than print result (a double) in a system default format? If you don't know how to use a NumberFormat then read the API doc, read the examples, Google if necessary. Don't just guess. The mistake in your code is a very elementary one.
Java's API has always been basically a cat that has been ran over by a truck on a highway: Dead crap. Looked it up anyways and it basically told me nothing that example page didnt tell me and explained it better.
double result=Double.valueOf(price)*Double.valueOf(String.valueOf(multiply)); //I store it as a float for decimal reasons
NumberFormat nb=NumberFormat.getInstance();
nb.setMinimumFractionDigits(2);
nb.setMaximumFractionDigits(2);
nb.format(result);
System.out.println(result);
Nope, not answered. Still shows without 2 digits to the right of the decimal point.
String price="16,00 €"; //Price
int multiply=2; //Multiplcation that I want to do to price
int positions=0; //Position of the symbol
int positiond=0; //Position of the decimal
char[] symbols = new char[] { '€','$' }; //Symbols that are avaliable
char[] decimalseperators= new char[] { '.',',' }; // Decimal markers that are avaliable
char symbol=' '; //Somewhere to store the symbol
char deci=' '; //Somewhere to store the decimal
String blank="";
boolean pre; //Check if the decimal is before or after the the symbol
for (int i=0;i<decimalseperators.length;i++) //I run thru the entire decimal array and the price itself to look for the decimal
{
deci=decimalseperators[i];
if (price.indexOf(deci) >=0)
{
if (deci!='.') //If the decimal is not a dot, for compatibility reasons, I change it to a dot
{
StringBuilder newprice = new StringBuilder(price);
newprice.setCharAt(price.indexOf(deci), '.');
price=newprice.toString();
}
positiond=price.indexOf(deci); //I store the position of the decimal point
break;
}
}
for (int i=0;i<symbols.length;i++) //I run thru the entire symbol array and the price itself to look for the symbol
{
symbol=symbols[i];
if (price.indexOf(symbol) >= 0)
{
char[] charprice=price.toCharArray();
StringBuilder sb = new StringBuilder();
sb.append(charprice);
sb.deleteCharAt(price.indexOf(symbol));
charprice = sb.toString().toCharArray();
price=charprice.toString();
positions=price.indexOf(symbol); //I store the position of the symbol
break;
}
}
if (positions >positiond) //If symbol after the decimal
{
pre=false;
}
else //If the symbol is before the decimal
{
pre=true;
}
float result=Float.valueOf(price)*Float.valueOf(String.valueOf(multiply)); //I store it as a float for decimal reasons
if (pre==false) //Put it all together again
{
price=result+" "+symbol;
}
else
{
price=symbol+" "+result;
} …
There are loads of ways to do this using standard methods from the String class, or char arrays, or regular expressions (etc). I'm not going to deprive you of the pleasure of finding one for yourself ;)
Iv obviously used the String class (where would I get the parse float function) so I dont see much other functions that can do this I dont think going from String to a char array removing it and then stringing it again, is the best way to do this but if there is no other way, what choice do I have Im not into regular expressions.
Possibly the worst advice of 2013 so far in this forum. Even if you never write a single program for real, even your teacher will read and mark your code. Coding standards and conventions are there to help everybody, and the sooner you engrain all the right habits the better.
I disagree.
If noone is going to read your code, name things however you feel like that makes sense to you and you remember it. This of course if only YOU are going to read the code.
I shouldnt prepare my code for others.
One of the most important things when coding is commenting; Commenting is more for you than others as you maybe one day see your code again and say "Why did I do that?". It makes life so much easier.
But other than that? If you want to name two int variables HiIAmBerry and another one klshldgfkjhsgfdj and add them up to a ohrlylolo varaible, be my guest! As long as you comment them and later remember why/what they do
Thank you for the quick response bguild. That was carelessness on my part about the Play method naming.
Personally, dont listen to bguild; In most cases, noone sees your code except you. You dont need to write how a set of code conventions state. You write the code however it is clearest/makes sense to you. First, write the code how it is clearest to you, the developer. THEN do things to better the code, optimize, etc.
I think a precomplied jar/exe would have been nice to test your program out...Was your program free choosing (you choose to do this) or assigned?
String price="16,00 €"; //Price
int multiply=2; //Multiplcation that I want to do to price
int positions=0; //Position of the symbol
int positiond=0; //Position of the decimal
char[] symbols = new char[] { '€','$' }; //Symbols that are avaliable
char[] decimalseperators= new char[] { '.',',' }; // Decimal markers that are avaliable
char symbol=' '; //Somewhere to store the symbol
char deci=' '; //Somewhere to store the decimal
boolean pre; //Check if the decimal is before or after the the symbol
for (int i=0;i<symbols.length;i++) //I run thru the entire symbol array and the price itself to look for the symbol
{
symbol=symbols[i];
if (price.indexOf(symbol) >= 0)
{
positions=price.indexOf(symbol); //I store the position of the symbol
break;
}
}
for (int i=0;i<decimalseperators.length;i++) //I run thru the entire decimal array and the price itself to look for the decimal
{
deci=decimalseperators[i];
if (price.indexOf(deci) >=0)
{
if (deci!='.') //If the decimal is not a dot, for compatibility reasons, I change it to a dot
{
StringBuilder newprice = new StringBuilder(price);
newprice.setCharAt(price.indexOf(deci), '.');
price=newprice.toString();
}
positiond=price.indexOf(deci); //I store the position of the decimal point
break;
}
}
if (positions >positiond) //If symbol after the decimal
{
pre=false;
}
else //If the symbol is before the decimal
{
pre=true;
}
float result=Float.parseFloat(price)*Float.parseFloat(String.valueOf(multiply)); //I store it as a float for decimal reasons
if (pre==false) //Put it all together again
{
price=result+" "+symbol;
}
else
{
price=symbol+" "+result;
}
System.out.println(price); //Print it out
System.exit(1);
Here it is. Gives me a error on the result line with …
