public void actionPerformed(ActionEvent evt)
{
String arg=evt.getActionCommand();
 
if(arg.equals("ORDER INFO"))
{
AppletContext context = getAppletContext();
context.showDocument

("file:///C:/Java/jdk1.6.0_24/bin/Order_info.html", 

"_blank"); 
Applet Order_info = context.getApplet("Order_info");

}

Can you give us a hint?
Is it a compile error,
or an execution time error
or a logic error?

error while compilation pointing to the url..
cannot find symbol showDocument("")

Please copy and paste the FULL text of the error message. It has valuable info about the problem.

MsgDigestApp.java: cannot find symbol
symbol : method showDocument(java.lang.String,java.lang.String)
location:interface java.applet.AppletContext
context.showDocument("file:///C:/Java/jdk1.6.0_24/bin/Order_info.html",
"_blank");

here is my overall code

import java.io.*;
import java.math.*;
import java.security.*;
import java.awt.*;
import java.awt.event.*;
import java.applet.*;
import java.net.*;
public final class MsgDigestApp extends Applet 

implements ActionListener
{
//Frame window = new Frame("This is the Frame's 

title bar");
private  Button b0,b1,b2,b3,b4,b5,b6;
private TextArea message=new TextArea("ENTER 

PURCHASE INFORMATION");
private TextArea message1=new TextArea("ENTER 

ORDER INFORMATION");
private TextArea a=new TextArea();
private TextArea a1=new TextArea();
private TextField digest=new TextField();
private TextField digest1=new TextField();
private TextField digest2=new TextField();
private TextField t=new TextField();
private TextField n=new TextField();
private TextField phi=new TextField();
private TextField pub=new TextField();
private TextField dec_msg=new TextField();
private TextField en_msg=new TextField();
private MessageDigest sha;
private Label l,l1,s1,s2,s3,s4,s5,s6;
private Label la1,la2,la3,la4,la5,la6,la7;



public void init()
{
this.setLayout(new BorderLayout(10,10)); 

Panel p1=new Panel();
l=new Label("purchase info");
p1.add(l);
p1.add(message);
//l1=new Label("Order info");
//p1.add(l1);
b6=new Button("ORDER INFO");

b6.addActionListener(this);
p1.add(b6);
//p1.add(message1);
p1.add(message1);
add(p1,"North");

Panel p2 = new Panel(new GridLayout(4,2, 5, 5));
s1=new Label("hash1");
p2.add(s1);
p2.add(digest);
s2=new Label("hash2");
p2.add(s2);
p2.add(digest1);
s3=new Label("concat");
p2.add(s3);
p2.add(t);
s4=new Label("hash resultant");
p2.add(s4);
p2.add(digest2);
add(p2,"South");



Panel p=new Panel(new GridLayout(2,1,4,4));
b0=new Button("Clear text");
b0.addActionListener(this);
p.add(b0);
b1=new Button("Hash");
b1.addActionListener(this);
p.add(b1);
add(p,"West");
setAlgo("sha-1");
Panel p5=new Panel(new GridLayout(10,1,7,7));
la1=new Label("enter p");
p5.add(la1);
p5.add(a);
la2=new Label("enter q");
p5.add(la2);
p5.add(a1);
s5=new Label("Value(n)");
p5.add(s5);
p5.add(n);
la3=new Label("phi");
p5.add(la3);
p5.add(phi);
la4=new Label("Public Key: e");
p5.add(la4);
p5.add(pub);

s6=new Label("Encrypted msg");
p5.add(s6);
p5.add(en_msg);
la7=new Label("Decrypted msg");
p5.add(la7);
p5.add(dec_msg);
add(p5,"Center");
Panel p6=new Panel(new GridLayout(2,1,4,4));
b2=new Button("Cal N");
b2.addActionListener(this);
p6.add(b2);
b3=new Button("Encrypt");
b3.addActionListener(this);
p6.add(b3);
b4=new Button("Decrypt");
b4.addActionListener(this);
p6.add(b4);
add(p6,"East");

}

 public void itemStateChanged(ItemEvent evt)
   {  if (evt.getStateChange() == 

ItemEvent.SELECTED) 
         setAlgo((String)evt.getItem());
   }

   private void setAlgo(String alg)
   {  try
      {  sha = MessageDigest.getInstance(alg);
} catch(NoSuchAlgorithmException e)
      {  digest.setText("" + e);
digest1.setText("" + e);
digest2.setText(""+e);
      }
   }
  


public void actionPerformed(ActionEvent evt)
{
String arg=evt.getActionCommand();
 
if(arg.equals("ORDER INFO"))
{
AppletContext context = getAppletContext();
context.showDocument

("file:///C:/Java/jdk1.6.0_24/bin/Order_info.html", 

"_blank"); 
Applet Order_info = context.getApplet("Order_info");

}
else if(arg.equals("Hash"))
{
String m=message.getText();
String m1=message1.getText();
String m2=t.getText();

computeDigest(m.getBytes());
computeDigest1(m1.getBytes());
con();
computeDigest2(m2.getBytes());

}
else if(arg.equals("Cal N"))
{
cal_n();
choose_e();
}
else if(arg.equals("Encrypt"))
{
en();
}
else if(arg.equals("Decrypt"))
{
dec();
}
else if(arg.equals("Clear text"))
{
message.setText("");
digest.setText("");
message1.setText("");
digest1.setText("");
t.setText("");
digest2.setText("");
n.setText("");
phi.setText("");
pub.setText("");
a.setText("");
a1.setText("");
en_msg.setText("");
dec_msg.setText("");
}
 }

private void computeDigest(byte[] b) 
{
sha.reset();
sha.update(b);
byte[] hash1=sha.digest();
String d="";
String e="";
int usbyte=0;
for(int i=0;i<hash1.length;i++)
{
usbyte=hash1[i]&0xFF;
if(usbyte<16)
d+="0"+Integer.toHexString(usbyte);
else
d+=Integer.toHexString(usbyte);
}
e=d.toUpperCase();
digest.setText(""+e);

}
private void computeDigest1(byte[] b) 
{

sha.reset();
sha.update(b);
byte[] hash2=sha.digest();
String d="";
String f="";
int usbyte=0;
for(int i=0;i<hash2.length;i++)
{
usbyte=hash2[i]&0xFF;
if(usbyte<16)
d+="0"+Integer.toHexString(usbyte);
else
d+=Integer.toHexString(usbyte);
}
f=d.toUpperCase();
digest1.setText(""+f);

}
private void computeDigest2(byte[] b) 
{

sha.reset();
sha.update(b);
byte[] hash1=sha.digest();
String d="";
String e="";
int usbyte=0;
for(int i=0;i<hash1.length;i++)
{
usbyte=hash1[i]&0xFF;
if(usbyte<16)
d+="0"+Integer.toHexString(usbyte);
else
d+=Integer.toHexString(usbyte);
}
e=d.toUpperCase();
digest2.setText(""+e);
}

private void con()
{
String str,x,y;
x=digest.getText();
y=digest1.getText();
str=x+y;
t.setText(""+str);
}


private void cal_n()
{
String mul1,mul2,mul0,mul;
int x,y,x1,y1,mul3,mul4;
mul1=a.getText();
mul2=a1.getText();
x=Integer.parseInt(mul1);
y=Integer.parseInt(mul2);
mul3=x*y;
mul=String.valueOf(mul3);
n.setText(""+mul);
x1=Integer.parseInt(mul1)-1;
y1=Integer.parseInt(mul2)-1;
mul4=x1*y1;
mul0=String.valueOf(mul4);
phi.setText(""+mul0);
}
private void choose_e()
{
String n1=phi.getText();
BigInteger n2=new BigInteger(n1);
String n3=pub.getText();
BigInteger n4=new BigInteger(n3);
while( n4.gcd( n2 ).compareTo( BigInteger.ONE ) != 

0 )
{
n4 = n4.add( BigInteger.ONE );
pub.setText(n4.toString());
}

}
private void en()
{
String n1=n.getText();
 BigInteger n2= new BigInteger(n1);
String n3=pub.getText();
 BigInteger n4= new BigInteger(n3);
String  hexmsg=digest2.getText();
 BigInteger v= new BigInteger(hexmsg,16);

BigInteger c = v.modPow( n4, n2 );

String c2=String.valueOf(v);
en_msg.setText(""+c2);
}
private void dec()
{String n1=n.getText();
 BigInteger n2= new BigInteger(n1);
String c1=en_msg.getText();
BigInteger c2=new BigInteger(c1);
String n3=pub.getText();
 BigInteger n4= new BigInteger(n3);
String n5=phi.getText();
BigInteger n6= new BigInteger(n5);
BigInteger d =n4.modInverse( n6 );
BigInteger m=c2.modPow(d,n2);  
dec_msg.setText(""+m.toString(16));
}

 
public void paint(Graphics g)
{
setBackground(Color.black);
g.setColor(Color.blue);
g.drawRect(0,0,this.getSize().width-1, this.getSize

().height-1) ; 

}
}

cannot find symbol
symbol : method showDocument(java.lang.String,java.lang.String)
location:interface java.applet.AppletContext

Read the API doc for the showDocument() method.
The compiler can NOT find a showDocument() method that takes two Strings as args.

Edited 5 Years Ago by NormR1: n/a

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