Start working with Java

Question

Hi everyone,
According to this page,
http://www.java2s.com/
There are heaps of technologies associated with Java.
As I am just a complete beginner, where do you think I should be starting with?
I am currently after a simple application with GUI, database
I think I should learn JSP afterwards, what is your opinion?
Thanks
Jack

Answer 1

Thanks guys for th replies.
Now I have the simple program working, so let's move on.
import java.awt.Button;
import java.awt.Color;
import java.awt.BorderLayout;
import java.awt.TextField;
import java.awt.Frame;
import java.awt.Font;
import java.awt.Label;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.WindowListener;
import java.awt.event.WindowEvent;
import java.awt.event.WindowAdapter;
import java.awt.event.FocusEvent;
import java.awt.event.FocusAdapter;
import java.awt.event.KeyAdapter;
import java.awt.event.KeyEvent;
import java.awt.event.MouseAdapter;
import java.awt.event.MouseEvent;
class Quotation
String QuotationID;
String QuotationType;
Quotation()
String FindByQuotationNo(String Type)
if (Type == "Test") {
return "Q08011132";
return "Error";
public class TestSwing extends Frame
Button post = new Button("Find");
Label mouseLabel = new Label("");
Quotation quo = new Quotation();
TestSwing(String title)
super(title);
super.setSize(500,400);
mouseLabel.setFont(new Font("Arial", Font.BOLD, 20));
mouseLabel.setBackground(Color.PINK);
super.add(post, BorderLayout.NORTH);
super.addWindowListener(new MyWindowListener());
super.add(mouseLabel, BorderLayout.CENTER);
mouseLabel.addMouseListener(new MyMouseAdapter(mouseLabel));
public static void main(String[] args)
TestSwing demo = new TestSwing("Hello World");
demo.setVisible(true);
String QuoType = quo.FindByQuotationNo ("Test");
class MyAction implements ActionListener
private String name = null;
MyAction(String name)
this.name = name;
public void actionPerformed(ActionEvent e)
class MyWindowListener extends WindowAdapter
public void windowClosing(WindowEvent e)
System.exit(0);
class MyMouseAdapter extends MouseAdapter
private Label label = null;
MyMouseAdapter(Label label)
this.label = label;
public void mouseClicked(MouseEvent e)
int x = e.getX();
int y = e.getY();
String key = null;
if (e.getButton() == e.BUTTON1)
key = "left key";
else if (e.getButton() == e.BUTTON3)
key = "right key";
label.setText ("X-" + x + "Y-" + y + "," +key);
With the above snippet, I wonder how can you connect "FindByQuotationType" to the main class
///// Error
C:\JavaTest>javac TestSwing.java
TestSwing.java:72: non-static variable quo cannot be referenced from a static co
ntext
String QuoType = quo.FindByQuotationNo ("Test");
^
1 error