Develop Reference

Java Minecraft Plugin Issue - Not responding to if statement?

So I'm making a simple code redemption plugin for a Minecraft server. What's weird is when I type /redeem (the valid code), nothing happens, although it's supposed to... The valid code is the a code entered into the plugins configuration by the user.
Here's my code...
public boolean onCommand(CommandSender sender, Command cmd, String label, String[] args)
{
//Assigns the commands chosen in config to strings
String commandChosen1 = this.getConfig().getString("Command for code 1");
String commandChosen2 = this.getConfig().getString("Command for code 2");
String commandChosen3 = this.getConfig().getString("Command for code 3");
//Assigns the codes to strings
String validCode1 = this.getConfig().getString("Valid Code 1");
String validCode2 = this.getConfig().getString("Valid Code 2");
String validCode3 = this.getConfig().getString("Valid Code 3");
//If the redeem command is sent from a player
if(cmd.getName().equalsIgnoreCase("redeem") && sender instanceof Player)
{
//Casts the sender to a new player.
Player player = (Player) sender;
//Creates object hasUSed to store whether or not the player has already redeemed a code
Object hasUsed = this.getConfig().get(player.getName());
//Gives an error message of the arguments don't equal 1.
if(args.length != 1)
{
player.sendMessage(ChatColor.DARK_RED + "Please enter a valid promo code. Find them on our twitter!");
}
if(args.length == 1)
{
//If the player hasn't used the code yet and the arguments given are equal to a code then give them the reward...
if(args[0] == validCode1 && hasUsed == null)
{
this.getConfig().set(player.getName(), 1);
player.sendMessage(ChatColor.GREEN + "Promo code successfully entered!");
if(commandChosen1 == "xp")
{
Bukkit.dispatchCommand(player, commandChosen1 + getConfig().getString("XP Given") + "L" + " " + player.getName());
}
}
}
return true;
}
return false;
}
The problem occurs on "if (args[0] == validCode1 && hasUsed == null)". The code that's supposed to happen if both those things check out, doesn't happen and I have no clue why.

Make sure to use equals() when comparing Strings. Using commandChosen1 == "xp" compares string references not values; use commandChosen1.equals("xp") or if you prefer "xp".equals(commandChosen1).
Also,
While it is possible to use a this.getConfig().getString()with a key value that contains spaces, it can make configuration files hard to read and cluttered. Whenever I design plugins I'll design my config.yml as such
VoteGUI:
message: 'hello'
and then run a this.getConfig().getString("VoteGUI.message");
For yours I'd suggest something like this
Promo-Codes:
validCode1: 'insert code here'
validCode2: 'insert code here'
validCode3: 'insert code here'
and then put this in your onCommand method:
String validCode1 = this.getConfig().getString("Promo-Codes.validCode1");
String validCode2 = this.getConfig().getString("Promo-Codes.validCode2");
String validCode3 = this.getConfig().getString("Promo-Codes.validCode3");
If this does not resolve the issue, copy and paste the exception being thrown from the console and I may be of further assistance

Creating a poll system using PircBot

I'm new to Java and I'm trying to create a poll system using PircBot.
So far my code is this:
if (message.startsWith("!poll")) {
String polly = message.substring(6);
String[] vote = polly.split(" ");
String vote1 = vote[0];
String vote2 = vote[1];
}
Which splits the strings so that someone can type !poll "option1 option2" for example and it will be split into vote1 = option1 and vote2 = option2.
I'm kind of lost from here. Am I even heading in the right direction for creating a voting system?
I figure that I'd have a separate statement as follows.
if (message.equalsIgnoreCase("!vote " + option1))
But I'm not sure where to go with that either.

Netbeans error when trying to run java project

I am getting an error when trying to run my code in Java. I am trying to run an output to a file where the user uses dialog boxes to input name, pay rate, and hours worked.
This is the code I have:
package output.to.a.file.broc.east;
import javax.swing.JOptionPane;
public class OutputToAFileBrocEast
{
public static void main(String[] args)
{
OutputFile payFile;
payFile = new OutputFile ("payroll.txt");
String name;
String rate;
String hours;
String answer;
do
{
int number1;
int number2;
name = JOptionPane.showInputDialog("Enter first and last name: ");
rate = JOptionPane.showInputDialog("Enter hourly rate: ");
hours = JOptionPane.showInputDialog("Enter hours for previous week: ");
number1 = Integer.parseInt (rate);
number2 = Integer.parseInt (hours);
payFile.writeWord(name);
payFile.writeWord(rate);
payFile.writeWord(hours);
payFile.writeEOL();
answer = JOptionPane.showInputDialog("Do you have another employee? [y/n");
}
while (answer.equalsIgnoreCase ("yes"));
}
}
But I get this error when trying to run the code:
Error: Could not find or load main class output.to.a.file.broc.east.OutputToAFileBrocEast
Java Result: 1
I am using Netbeans 7.4. and I have already attempted to delete the netbeans cache.

If you build a jar, open it with 7zip or so, and you should find:
/output/to/a/file/broc/east/OutputToAFileBrocEast.class
The same when the same holds without jar: in the dist or target folder under classes.
Maybe you have an extra directory or such.

Having problems using a Switch statement in Java

I'm making a Character Creator for fun and I seem have run into yet another java problem! I tried googling around for a bit but I didn't seem to find a working solution... I'm trying to use a switch statement for the compiler to output certain information depending on what class (Knight, Archer, Mage) the user chose, but when inputting my code I get error messages
My code so far (cleaned up a bit) is :
String name;
String className;
int attPoints;
System.out.println("Welcome to 'GameName's' Character Creator 2.0!\n");
Thread.sleep(500);
System.out.print("First off, what do you want your characters name to be? \n\nName : ");
name = Scan.nextLine();
Thread.sleep(500);
System.out.print("\nYou are now to be known as "+ name + "!");
System.out.print("\n\n" + name + ", what class do you want to be? ");
System.out.print("\n\nClasses available :\nKnight");
Thread.sleep(1500);
System.out.print("\nMage");
Thread.sleep(300);
System.out.print("\nDruid");
Thread.sleep(300);
System.out.print("\nNinja");
Thread.sleep(300);
System.out.print("\nArcher");
Thread.sleep(300);
System.out.print("\nAdventurer");
Thread.sleep(300);
System.out.print("\nBerserker");
Thread.sleep(300);
System.out.print("\n\nClass : ");
className = Scan.next();
Class userClass = Class.valueOf(className);
Thread.sleep(500);
System.out.println("\nCongratulations! Your class is now : "+ className + "!");
Thread.sleep(500);
// This is where I get an error.
// - Syntax error, insert "enum Identifier" to complete EnumHeaderName
// - Syntax error, insert "EnumBody" to complete BlockStatement
// - Syntax error on token "void", # expected
public void setClass()
switch (Class) {
case Knight:
System.out.println(" Various lore about knights ");
break;
}
}
I THINK I may be trying to create a class inside another class - but when I tried putting it outside it got another error...
Also, I have an int called attPoints, and after I choose a class I want to add 10 to it, but unsure how.

You're switching on Class which is a Java type. Take a look at this tutorial: http://docs.oracle.com/javase/tutorial/java/nutsandbolts/switch.html
You probably want to do something like:
switch (userClass) {
case Class.KNIGHT:
System.out.println(" Various lore about knights ");
break;
}

How do I get this Scanner to stop right before a blank line?

I am trying to get a file scanner to stop scanning when the next line is blank.
public static void createAudioTypes(File list, Scanner mediaReader, String mediaType) {
if (mediaType.equalsIgnoreCase("CD") || mediaType.equalsIgnoreCase("CASSETTE")) {
String title = mediaReader.next();
String artist = mediaReader.next();
int year = 0;
if (mediaReader.hasNextInt()) {
year = mediaReader.nextInt();
}
String lbl = mediaReader.next();
ArrayList<String> songs = new ArrayList<String>();
System.out.println(title);
System.out.println(artist);
System.out.println(year);
System.out.println(lbl);
mediaReader.useDelimiter(",");
while(mediaReader.nextLine().equalsIgnoreCase(mediaType)) {
songs.add(mediaReader.next());
}
System.out.println(songs);
}
}
Part of the text file I'm reading from:
CD
Immersion
Pendulum
2011
Atlantic
Genesis, Salt in the Wounds, Watercolour, Set Me on Fire, Crush, Under the Waves, Immunize (feat. Liam Howlett), The Island - pt. 1 - Dawn, The Island - pt. 2 - Dusk, Comprachicos, The Vulture, Witchcraft, Self vs Self (feat. In Flames), The Fountain (feat Steven Wilson), Encoder
16.99
CD
Demon Days
Gorillaz
Notice the line with all the track titles does not word wrap. This line is to be read into an Array List. Notice just beneath the line of track titles, there's a price and then a blank line. I want this
blank line to be the stopping point for the scanner, but I can't get the syntax.
Thank you!

read whole line by readLine(), trim() it to see if its isEmpty()