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Views: 352 | Replies: 4
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Join Date: Apr 2007
Posts: 13
Reputation: 
Rep Power: 2
Solved Threads: 0
Newbie Poster
This program will build/compile but not run. I get an error message
Code:
Now I am very new to java and all of the logical errors and messages that come with them. Please bare with me. Can anyone take a look? Id appreciate it so much.
Code:
java.lang.NoClassDefFoundError: midterm1/Main Exception in thread "main" Java Result: 1
Now I am very new to java and all of the logical errors and messages that come with them. Please bare with me. Can anyone take a look? Id appreciate it so much.
/*
* Try1.java
*
* Created on October 10, 2007, 11:43 PM
*
* To change this template, choose Tools | Template Manager
* and open the template in the editor.
*//**
*
* @author gefeno
*/import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Dimension;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.Rectangle;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;
import java.awt.geom.Ellipse2D;
import java.awt.geom.Line2D;
import java.util.Vector;
import javax.swing.ButtonGroup;
import javax.swing.JCheckBox;
import javax.swing.JComboBox;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JRadioButton;
import javax.swing.UIManager;
public class Main{
JFrame painting;
JFrame tools; int drawType;
boolean fill;
Color color; public Main() {
JFrame drawFrame = new JFrame("Draw");
drawFrame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
drawFrame.getContentPane().add(new ControlPanel(), BorderLayout.CENTER);
drawFrame.pack();
drawFrame.setVisible(true); JFrame toolFrame = new JFrame("Draw");
toolFrame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
toolFrame.getContentPane().add(new DrawPanel(), BorderLayout.CENTER);
toolFrame.pack();
toolFrame.setVisible(true);
} public static void main(String[] args) throws Exception {
// Ask for window decorations provided by the look and feel.
UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName()); new Main();
} private class ControlPanel extends JPanel {
// Get rid of this
private static final long serialVersionUID = 1L; public ControlPanel() {
this.setPreferredSize(new Dimension(250, 100)); final JRadioButton ovalButton = new JRadioButton("Oval");
ovalButton.setActionCommand("oval");
ovalButton.setSelected(true);
final JRadioButton rectangleButton = new JRadioButton("Rectangle");
rectangleButton.setActionCommand("rectangle");
final JRadioButton lineButton = new JRadioButton("Line");
lineButton.setActionCommand("line"); // Group the radio buttons.
final ButtonGroup group = new ButtonGroup();
group.add(ovalButton);
group.add(rectangleButton);
group.add(lineButton); ActionListener action = new ActionListener() {
public void actionPerformed(ActionEvent e) {
if (e.getActionCommand().equals("oval")) {
drawType = 0;
} else if (e.getActionCommand().equals("rectangle")) {
drawType = 1;
} else if (e.getActionCommand().equals("line")) {
drawType = 2;
}
}
}; // Register a listener for the radio buttons.
ovalButton.addActionListener(action);
rectangleButton.addActionListener(action);
lineButton.addActionListener(action); this.add(ovalButton);
this.add(rectangleButton);
this.add(lineButton); final JCheckBox check = new JCheckBox("Fill with color");
check.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
fill = check.isSelected();
}
}); this.add(check); final Color[] colors = { Color.black, Color.red, Color.green,
Color.blue, Color.yellow, Color.cyan, Color.magenta };
String[] colorStrings = {"Black", "Red", "Green", "Blue",
"Yellow", "Cyan", "Magenta"};
final JComboBox colorList = new JComboBox(colorStrings);
colorList.addActionListener(new ActionListener() {
public void actionPerformed(ActionEvent e) {
color = colors[colorList.getSelectedIndex()];
}
});
this.add(colorList);
}
} private class DrawPanel extends JPanel {
Vector<MyShape> shapes;
private static final long serialVersionUID = 1L;
protected void paintComponent(Graphics g) {
// TODO Auto-generated method stub
super.paintComponent(g);
} DrawPanel() {
this.setPreferredSize(new Dimension(500, 500));
this.setLocation(500, 500);
this.setDoubleBuffered(true);
shapes = new Vector<MyShape>();
this.setBackground(Color.white);
final JPanel me = this;
this.addMouseListener(new MouseListener() {
int x, y;
public void mouseClicked(MouseEvent arg0) {
}
public void mouseEntered(MouseEvent arg0) {
}
public void mouseExited(MouseEvent arg0) {
}
public void mousePressed(MouseEvent arg0) {
x = arg0.getX();
y = arg0.getY();
}
public void mouseReleased(MouseEvent arg0) {
switch (drawType) {
case 0: // Oval
MyShape oval = new MyShape();
oval.x = Math.min(x, arg0.getX());
oval.y = Math.min(y, arg0.getY());
oval.w = Math.abs(x - arg0.getX());
oval.h = Math.abs(y - arg0.getY());
oval.color = color;
oval.fill = fill;
oval.type = drawType;
shapes.add(oval);
break; case 1: // Rectangle
MyShape rect = new MyShape();
rect.x = Math.min(x, arg0.getX());
rect.y = Math.min(y, arg0.getY());
rect.w = Math.abs(x - arg0.getX());
rect.h = Math.abs(y - arg0.getY());
rect.color = color;
rect.fill = fill;
rect.type = drawType;
shapes.add(rect);
break; case 2: // Line
MyShape line = new MyShape();
line.x = x;
line.x2 = arg0.getX();
line.y = y;
line.y2 = arg0.getY();
line.color = color;
line.type = drawType;
shapes.add(line);
break;
}
me.repaint();
} });
}
public void paint(Graphics g) {
Graphics2D display = (Graphics2D) g; for (MyShape shape : shapes) {
switch (shape.type) {
case 0: // oval
if (shape.fill) {
display.setPaint(shape.color);
display.fillOval(shape.x, shape.y, shape.w, shape.h);
} else {
display.setColor(shape.color);
display.draw(new Ellipse2D.Double(shape.x, shape.y,
shape.w, shape.h));
}
break; case 1: // Rectangle
if (shape.fill) {
display.setPaint(shape.color);
display.fillRect(shape.x, shape.y, shape.w, shape.h);
} else {
display.setColor(shape.color);
display.drawRect(shape.x, shape.y, shape.w, shape.h);
}
break; case 2: // Line
display.setColor(shape.color);
display.draw(new Line2D.Double(shape.x, shape.y, shape.x2,
shape.y2));
break; } }
} private class MyShape {
int x, y, w, h;
int x2, y2;
Color color;
boolean fill;
int type;
}
}
}
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Join Date: May 2007
Location: USA
Posts: 3,090
Reputation: 
Rep Power: 15
Solved Threads: 307
Your class name needs to match the file name. You have named the class Main put placed it in midterm1.java from the looks of it.
Side note: You really could use some more white space to separate your methods and logical sections within the methods. It will make it much easier for you and others to follow the code.
Side note: You really could use some more white space to separate your methods and logical sections within the methods. It will make it much easier for you and others to follow the code.
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Join Date: Apr 2007
Posts: 13
Reputation:
Rep Power: 2
Solved Threads: 0
Newbie Poster
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Originally Posted by Ezzaral 
Your class name needs to match the file name. You have named the class Main put placed it in midterm1.java from the looks of it.
Side note: You really could use some more white space to separate your methods and logical sections within the methods. It will make it much easier for you and others to follow the code.
So I should just rename the class as midterm1?
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Join Date: Nov 2004
Location: Netherlands
Posts: 5,752
Reputation:
Rep Power: 19
Solved Threads: 200
and place it in the proper package, and refactor the code to be more readable, properly indented, and using some more whitespace, and you should probably refactor out a lot of the code into separate classes.
As people are clearly allowed to attack me but I'm not allowed to defend myself, I no longer post to this site.
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Join Date: Apr 2007
Posts: 13
Reputation:
Rep Power: 2
Solved Threads: 0
Newbie Poster
I got it semi-working.
/*
* NewClass.java
*
* Created on November 1, 2007, 3:47 PM
*
* To change this template, choose Tools | Template Manager
* and open the template in the editor.
*/
/**
*
* @author gefeno
*/
import java.awt.BorderLayout;
import java.awt.Color;
import java.awt.Dimension;
import java.awt.Graphics;
import java.awt.Graphics2D;
import java.awt.Rectangle;
import java.awt.event.ActionEvent;
import java.awt.event.ActionListener;
import java.awt.event.MouseEvent;
import java.awt.event.MouseListener;
import java.awt.geom.Ellipse2D;
import java.awt.geom.Line2D;
import java.util.Vector;
import javax.swing.ButtonGroup;
import javax.swing.JCheckBox;
import javax.swing.JComboBox;
import javax.swing.JFrame;
import javax.swing.JPanel;
import javax.swing.JRadioButton;
import javax.swing.UIManager;
public class NewClass
{
JFrame painting;
JFrame tools;
int drawType;
boolean fill;
Color color;
public NewClass()
{
JFrame drawFrame = new JFrame("Draw");
drawFrame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
drawFrame.getContentPane().add(new ControlPanel(), BorderLayout.CENTER);
drawFrame.pack();
drawFrame.setVisible(true);
JFrame toolFrame = new JFrame("Draw");
toolFrame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
toolFrame.getContentPane().add(new DrawPanel(), BorderLayout.CENTER);
toolFrame.pack();
toolFrame.setVisible(true);
}
public static void main(String[] args) throws Exception
{
// Ask for window decorations provided by the look and feel.
UIManager.setLookAndFeel(UIManager.getSystemLookAndFeelClassName());
new NewClass();
}
private class ControlPanel extends JPanel
{
// Get rid of this
private static final long serialVersionUID = 1L;
public ControlPanel()
{
this.setPreferredSize(new Dimension(250, 100));
final JRadioButton ovalButton = new JRadioButton("Oval");
ovalButton.setActionCommand("oval");
ovalButton.setSelected(true);
final JRadioButton rectangleButton = new JRadioButton("Rectangle");
rectangleButton.setActionCommand("rectangle");
final JRadioButton lineButton = new JRadioButton("Line");
lineButton.setActionCommand("line");
// Group the radio buttons.
final ButtonGroup group = new ButtonGroup();
group.add(ovalButton);
group.add(rectangleButton);
group.add(lineButton);
ActionListener action = new ActionListener()
{
public void actionPerformed(ActionEvent e)
{
if (e.getActionCommand().equals("oval"))
{
drawType = 0;
}
else if (e.getActionCommand().equals("rectangle"))
{
drawType = 1;
}
else if (e.getActionCommand().equals("line"))
{
drawType = 2;
}
}
};
// Register a listener for the radio buttons.
ovalButton.addActionListener(action);
rectangleButton.addActionListener(action);
lineButton.addActionListener(action);
this.add(ovalButton);
this.add(rectangleButton);
this.add(lineButton);
final JCheckBox check = new JCheckBox("Fill with color");
check.addActionListener(new ActionListener()
{
public void actionPerformed(ActionEvent e)
{
fill = check.isSelected();
}
});
this.add(check);
final Color[] colors =
{
Color.black, Color.red, Color.green,
Color.blue, Color.yellow, Color.cyan, Color.magenta };
String[] colorStrings =
{
"Black", "Red", "Green", "Blue",
"Yellow", "Cyan", "Magenta"};
final JComboBox colorList = new JComboBox(colorStrings);
colorList.addActionListener(new ActionListener()
{
public void actionPerformed(ActionEvent e)
{
color = colors[colorList.getSelectedIndex()];
}
});
this.add(colorList);
}
}
private class DrawPanel extends JPanel
{
Vector<MyShape> shapes;
private static final long serialVersionUID = 1L;
protected void paintComponent(Graphics g)
{
// TODO Auto-generated method stub
super.paintComponent(g);
}
DrawPanel()
{
this.setPreferredSize(new Dimension(500, 500));
this.setLocation(500, 500);
this.setDoubleBuffered(true);
shapes = new Vector<MyShape>();
this.setBackground(Color.white);
final JPanel me = this;
this.addMouseListener(new MouseListener()
{
int x, y;
public void mouseClicked(MouseEvent arg0)
{
}
public void mouseEntered(MouseEvent arg0)
{
}
public void mouseExited(MouseEvent arg0)
{
}
public void mousePressed(MouseEvent arg0)
{
x = arg0.getX();
y = arg0.getY();
}
public void mouseReleased(MouseEvent arg0)
{
switch (drawType)
{
case 0: // Oval
MyShape oval = new MyShape();
oval.x = Math.min(x, arg0.getX());
oval.y = Math.min(y, arg0.getY());
oval.w = Math.abs(x - arg0.getX());
oval.h = Math.abs(y - arg0.getY());
oval.color = color;
oval.fill = fill;
oval.type = drawType;
shapes.add(oval);
break;
case 1: // Rectangle
MyShape rect = new MyShape();
rect.x = Math.min(x, arg0.getX());
rect.y = Math.min(y, arg0.getY());
rect.w = Math.abs(x - arg0.getX());
rect.h = Math.abs(y - arg0.getY());
rect.color = color;
rect.fill = fill;
rect.type = drawType;
shapes.add(rect);
break;
case 2: // Line
MyShape line = new MyShape();
line.x = x;
line.x2 = arg0.getX();
line.y = y;
line.y2 = arg0.getY();
line.color = color;
line.type = drawType;
shapes.add(line);
break;
}
me.repaint();
}
});
}
public void paint(Graphics g)
{
Graphics2D display = (Graphics2D) g;
for (MyShape shape : shapes)
{
switch (shape.type)
{
case 0: // oval
if (shape.fill)
{
display.setPaint(shape.color);
display.fillOval(shape.x, shape.y, shape.w, shape.h);
}
else
{
display.setColor(shape.color);
display.draw(new Ellipse2D.Double(shape.x, shape.y,
shape.w, shape.h));
}
break;
case 1: // Rectangle
if (shape.fill)
{
display.setPaint(shape.color);
display.fillRect(shape.x, shape.y, shape.w, shape.h);
}
else
{
display.setColor(shape.color);
display.drawRect(shape.x, shape.y, shape.w, shape.h);
}
break;
case 2: // Line
display.setColor(shape.color);
display.draw(new Line2D.Double(shape.x, shape.y, shape.x2,
shape.y2));
break;
}
}
}
private class MyShape
{
int x, y, w, h;
int x2, y2;
Color color;
boolean fill;
int type;
}
}
}
Last edited by Ortal : Nov 1st, 2007 at 4:50 pm.
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