Applet programs do not work in my JCreator

[java_fun2007]

Hi I fixed the path of Run Applet option in JDK Tools.
C:\Program Files\Java\jdk1.5.0_03\bin\appletviewer.exe
but when I compile my program it does not work I get this message on the screen.
Exception in thread "main" java.lang.NoSuchMethodError: main

why is that happening other main programs are working with no problem it just working with applets bring this message up.

import java.awt.*;
import java.awt.geom.*;
import javax.swing.*;
public class WelcomeApplet extends JApplet
{
	public void init(){}
	public void paint(Graphics g)
	{
		super.paint(g);
		int xPoints[] = {-10,0,10};
		int yPoints[] = {0,-50,0};
		Graphics2D g2d = (Graphics2D) g;
		GeneralPath triangle = new GeneralPath();
		triangle.moveTo(xPoints[0],yPoints[0]);
		for (int k = 1; k<xPoints.length;k++)
		triangle.lineTo(xPoints[k], yPoints[k]);
		triangle.closePath();
		g2d.translate(200,200);
		g2d.setColor(Color.gray);
		g2d.fill(triangle);
		g2d.rotate(Math.PI/4.0);
		g2d.fill(triangle);
		g2d.rotate(Math.PI/4.0);
	}
}

the code is right, it doesn't have a problem I guess.:rolleyes:

[hardwired]

The error message means that the jvm (java virtual machine) cannot find a main method in the WelcomeApplet class. To run an applet from/at the prompt you need to add an applet tag in a comment to the source file, eg,

//  <applet code="WelcomeApplet" width="400" height="400"></applet>
import java.awt.*;
...

and you run it at the prompt with

currentDirectory>appletviewer WelcomeApplet.java

[java_fun2007]

I see :) thanks hardwired .. It is still not working I got an error in prompt too.
I wrote: appletviewer WelcomeApplet.java
the error message is " 'appletviewer' is not recognized as an internal or external command , operable program or batch file.

I wrote this line in my program
//<applet code="WelcomeApplet" width="400" height="400"></applet>
above the import statements.

[hardwired]

Sounds like your computer cannot find your sdk/jdk path.
It should probably be
"C:\Program Files\Java\jdk1.5.0_03\bin"
to give access to everything: javac, java and appletviewer.
Try

currentDirectory>java -version

to see if you get your jre version.

[java_fun2007]

this is what I got when I typed

java -version

java version "1.6.0_05"
java <TM> SE Runtime Environment<build 1.6.0_05-b13>
java Hotspot <TM> Client VM <build 10.0-b19, mixed mode, sharing>

they are different right? it should be 1.5.0_03

[hardwired]

You are using the latest version, 1.6.0_05, okay.
I don't know anything about JCreator or how it sets its path variable but that seems to be the issue.

[java_fun2007]

Maybe the problem is with my computer, because I can't see applets on websites either. My IE always stuck when I visit those websites. However, I downloaded java and installed it several times.

[Kakuzoo]

Hi I fixed the path of Run Applet option in JDK Tools.
C:\Program Files\Java\jdk1.5.0_03\bin\appletviewer.exe
but when I compile my program it does not work I get this message on the screen.
Exception in thread "main" java.lang.NoSuchMethodError: main

why is that happening other main programs are working with no problem it just working with applets bring this message up.

import java.awt.*;
import java.awt.geom.*;
import javax.swing.*;
public class WelcomeApplet extends JApplet
{
	public void init(){}
	public void paint(Graphics g)
	{
		super.paint(g);
		int xPoints[] = {-10,0,10};
		int yPoints[] = {0,-50,0};
		Graphics2D g2d = (Graphics2D) g;
		GeneralPath triangle = new GeneralPath();
		triangle.moveTo(xPoints[0],yPoints[0]);
		for (int k = 1; k<xPoints.length;k++)
		triangle.lineTo(xPoints[k], yPoints[k]);
		triangle.closePath();
		g2d.translate(200,200);
		g2d.setColor(Color.gray);
		g2d.fill(triangle);
		g2d.rotate(Math.PI/4.0);
		g2d.fill(triangle);
		g2d.rotate(Math.PI/4.0);
	}
}

the code is right, it doesn't have a problem I guess.:rolleyes:

Instead of that try this
/*
<applet code="WelcomeApplet" height=400 width=400>
</applet>
*/

import java.awt.*;
import java.awt.geom.*;
import javax.swing.*;
public class WelcomeApplet extends JApplet
{
public void init(){}
public void paint(Graphics g)
{
super.paint(g);
int xPoints[] = {-10,0,10};
int yPoints[] = {0,-50,0};
Graphics2D g2d = (Graphics2D) g;
GeneralPath triangle = new GeneralPath();
triangle.moveTo(xPoints[0],yPoints[0]);
for (int k = 1; k<xPoints.length;k++)
triangle.lineTo(xPoints[k], yPoints[k]);
triangle.closePath();
g2d.translate(200,200);
g2d.setColor(Color.gray);
g2d.fill(triangle);
g2d.rotate(Math.PI/4.0);
g2d.fill(triangle);
g2d.rotate(Math.PI/4.0);
}
}

And save this as WelcomeApplet.html file.
Now run this. It will definitely work. Believe it