Ican't Learn Java!!

[rtkwar]

Hi I have my own mmo game on my web site iwant develop it from php to java
i downloaded many books about java but every time i try example from this books i get errors
that is make my morale decrease
Why Ican't learn Java?

example: itry this code but iget error

import javax.swing.*;
import java.awt.*;
 
public class UsingFonts extends JFrame
{
    public UsingFonts()
    {
        super("Using Fonts");
        setDefaultCloseOperation(EXIT_ON_CLOSE);
        setResizable(false);
        getContentPane().setLayout(null);
        getContentPane().add(new FontArea(new Rectangle(0, 0,
             DISPLAY_WIDTH, DISPLAY_HEIGHT)));
    
        smallFont = new Font("Courier New", Font.BOLD, 12);
        mediumFont = new Font("Times New Roman", Font.PLAIN, 24);
        largeFont = new Font("Verdana", Font.BOLD+Font.ITALIC, 36);
 
        setVisible(true);
 
        resizeToInternalSize(DISPLAY_WIDTH, DISPLAY_HEIGHT);
    }
        
   
    public void resizeToInternalSize(int internalWidth, int
           internalHeight)
    {
        Insets insets = getInsets();
        final int newWidth = internalWidth + insets.left +
              insets.right;
        final int newHeight = internalHeight + insets.top +
              insets.bottom;
    
        Runnable resize = new Runnable()
        {
            public void run()
            {
                setSize(newWidth, newHeight);
            }
        };
    
        if(!SwingUtilities.isEventDispatchThread())
        {
            try
            {
                SwingUtilities.invokeAndWait(resize);
            }
            catch(Exception e) {}
        }
        else
            resize.run();
        
        validate();
    }
    
    public class FontArea extends JPanel
    {
        public FontArea(Rectangle bounds)
        {
            setLayout(null);
            setBounds(bounds);
            setOpaque(false);
        }
    
        public void paintComponent(Graphics g)
        {
            Graphics2D g2D = (Graphics2D)g;
 
            g2D.setColor(Color.black);
            g2D.fill(getBounds());
 
            g2D.setColor(Color.cyan);
            g2D.setFont(smallFont);
            drawFromPoint("This is the standard coding font from top
                left (0, 0)", 0, 0, -1, -1, g);
    
            g2D.setColor(Color.red);
            g2D.setFont(mediumFont);
            drawFromPoint(" text from bottom right ("+getWidth()+",
                "+getHeight()+")", getWidth(), getHeight(), 1, 1, g);
    
            g2D.setColor(Color.green);
            g2D.setFont(largeFont);
            drawFromPoint("text in the middle", getWidth()/2,
                getHeight()/2, 0, 0, g);
        }
    }
 
   
    public static void drawFromPoint(String text, int x, int y, int
            relativeToX, int relativeToY, Graphics g)
    {
        int widthOffset;
        int heightOffset;
 
        FontMetrics fm = g.getFontMetrics();
 
        if(relativeToX < 0)
            widthOffset = 0;   // left point x
        else if(relativeToX==0)
            widthOffset = -(fm.stringWidth(text)/2); // from middle x
        else       // relativeToX > 0
            widthOffset = -fm.stringWidth(text);     // from right x
 
        if(relativeToY < 0)
            heightOffset = fm.getAscent();   // from top y
        else if(relativeToY==0)
            heightOffset = (fm.getHeight()/2)-fm.getDescent(); 
             // from middle y
        else // relativeToY > 0
            heightOffset = -fm.getDescent(); // from bottom y
 
        x+=widthOffset;
        y+=heightOffset;
 
        g.drawString(text, x, y);
    }
    
    public static void main(String[] args)
    {
        new UsingFonts();
    }
    
    private Font smallFont;
    private Font mediumFont;
    private Font largeFont;
    
    private static final int DISPLAY_WIDTH = 400;
    private static final int DISPLAY_HEIGHT = 400;
}

Error

C:\mywork>javac UsingFonts.java
UsingFonts.java:74: error: unclosed string literal
            drawFromPoint("This is the standard coding font from top
                          ^
UsingFonts.java:74: error: ';' expected
            drawFromPoint("This is the standard coding font from top
                                                                    ^
UsingFonts.java:75: error: ')' expected
                left (0, 0)", 0, 0, -1, -1, g);
                       ^
UsingFonts.java:75: error: not a statement
                left (0, 0)", 0, 0, -1, -1, g);
                     ^
UsingFonts.java:75: error: not a statement
                left (0, 0)", 0, 0, -1, -1, g);
                         ^
UsingFonts.java:75: error: ';' expected
                left (0, 0)", 0, 0, -1, -1, g);
                          ^
UsingFonts.java:75: error: unclosed string literal
                left (0, 0)", 0, 0, -1, -1, g);
                           ^
UsingFonts.java:79: error: unclosed string literal
            drawFromPoint(" text from bottom right ("+getWidth()+",
                                                                 ^
UsingFonts.java:79: error: ';' expected
            drawFromPoint(" text from bottom right ("+getWidth()+",
                                                                   ^
UsingFonts.java:80: error: illegal start of expression
                "+getHeight()+")", getWidth(), getHeight(), 1, 1, g);
                               ^
UsingFonts.java:80: error: unclosed string literal
                "+getHeight()+")", getWidth(), getHeight(), 1, 1, g);
                                ^
11 errors

C:\mywork>

[rtkwar]

All i want learn how i can write text inside applet!!!
I don't Know Whats I make When Reach to datebase level!! I hope I can Learn Java Without Problems

[awinston]

First, calm down (and I don't mean that in a flippant manner).

Next, start with the basics: Hello World Tutorial

If you want to learn Java, you need to start from the bottom and learn the syntax first. Once you know the basics, you will be able to understand what the errors are telling you (and why they are telling you things). Then you can start learning about graphics.

[rtkwar]

you can tell me what error in this code?
really iwant learn java but iwant sure if examples in book work good first or no
i read from this book:Java 1.4 Game Programming
i want know if this book good for learn java or no?

[kammce]

You have a mmo? can you put up a link to it? I kind of want to see what you have designed so far.

[rtkwar]

i programming my mmo with php not java
sorry friends but i want sure if book is good for learn because iam not english so i take time for translate and understand

[JosAH]

Check your double quotes (they're paired); in your code there's one missing somehwere and it makes your compiler puke.

kind regards,

Jos

[awinston]

you can tell me what error in this code?
really iwant learn java but iwant sure if examples in book work good first or no
i read from this book:Java 1.4 Game Programming
i want know if this book good for learn java or no?

The error messages already tell you what is wrong with your code. If you learn the syntax of Java, then you should be able to understand the messages.

For your book, I suggest that you learn from a source that is more up to date. The current version of Java is 7.6, whereas 1.4 is 3 releases behind (I know, a bit confusing). This is the official tutorial from Oracle, and there are plenty of books that you can use such as Sam's Teach Yourself Java in 21 Days.

[Norm]

The beginning and ending "s should be on the same line

[DarrylBurke]

Please go through the Forum Rules -- particularly the third paragraph.

db