SetEditable

Question

I have a class project that the user is to only input 10 numbers. I thought it would be cool to after the 10 numbers where entered to change the Editable field to false. When I did that I get an errors after the 10th number entered. How can I stop the errors or am I should I do something different instead of the setEditable(false)?
This is my code
// Purpose - Use an array to hold numbers entered and display only ones that are not duplicates.
// Java Graphics package
import java.awt.*;
import java.awt.event.*;
// Java extension packages
import javax.swing.*;
public class Assignment7_13 extends JApplet implements ActionListener {
int numarray [] = new int[19];      // holds arrary from input
String display = "";
boolean firsttime = true ;
int cntarray = 0;
// Labels for user interface
JLabel numlabel;
JTextField numfield;
JTextArea output;
// init method
public void init()
Container c = getContentPane();
c.setLayout(new FlowLayout());
numlabel = new JLabel("Enter integer from 10 - 100");
c.add(numlabel);
numfield = new JTextField(5);
c.add(numfield);
numfield.addActionListener(this);
// Setup textarea for output
output = new JTextArea(2,20);
c.add(output);
} // end int method
// process input
public void actionPerformed(ActionEvent e)
     int numinput = 0;
     int found = 0;
     if (cntarray <=10){
          numinput = Integer.parseInt(numfield.getText());
          if (numinput > 9 && numinput <101){
               found = linearSearch(numinput);
               if (found == -1 ){
                    numarray[cntarray] = numinput;
                    cntarray++;
                    display += Integer.toString(numinput) + " " ;
                    output.setText(display);
               } // end of if
          }// end if
     } // end if
     numfield.setText("");
     if (cntarray >= 10)
     numfield.setEditable(false);
} // end actionPerformed method
// Search array for specified key value
public int linearSearch( int key )
// loop through array elements
for ( int counter = 0; counter < numarray.length; counter++ )
// if array element equals key value, return location
if ( numarray[ counter ] == key )
return counter;
return -1; // key not found
} // end class Assignment7_13

Answer 1

Hi,
You have an error in checking the boundary.
The line:
if (cntarray<=10) {should be
if (cntarray<10) {Regards,
S&oslash;ren