The problem exists with any app I try to compile or run.
When compiling the SwingApplication.java program from Sun's swing
tutorial on-line I get the following:
SwingApplication.java:12: class JLabel not found in class
SwingApplication
final JLabel label = new JLabel(labelPrefix + "0 ");
^
SwingApplication.java:12: class JLabel not found in class
SwingApplication
final JLabel label = new JLabel(labelPrefix + "0 ");
^
SwingApplication.java:14: class JButton not found in class
SwingApplication
JButton button = new JButton("I'm a Swing button!");
^
SwingApplication.java:14: class JButton not found in class
SwingApplication
JButton button = new JButton("I'm a Swing button!");
^
SwingApplication.java:29: class JPanel not found in class
SwingApplication
JPanel pane = new JPanel();
^
SwingApplication.java:29: class JPanel not found in class
SwingApplication
JPanel pane = new JPanel();
^
SwingApplication.java:30: variable BorderFactory not found in class
SwingApplication
pane.setBorder(BorderFactory.createEmptyBorder(
^
SwingApplication.java:46: variable UIManager not found in class
SwingApplication
UIManager.getCrossPlatformLookAndFeelClassName());
^
SwingApplication.java:45: variable UIManager not found in class
SwingApplication
UIManager.setLookAndFeel(
^
SwingApplication.java:50: class JFrame not found in class
SwingApplication
JFrame frame = new JFrame("SwingApplication");
^
SwingApplication.java:50: class JFrame not found in class
SwingApplication
JFrame frame = new JFrame("SwingApplication");
^
11 errors
When I run this program :
----------------------------------------------------------------------
// Fig. 2.8: Addition.java
// An addition program
import javax.swing.JOptionPane; // import class JOptionPane
public class Addition {
public static void main( String args[] )
{
String firstNumber, // First string entered by
user
secondNumber; // Second dtring entered by
user
int number1, // First number to add
number2, // Second number to add
sum; // Sum of number1 and
number2
// read in first number from user as a string
firstNumber =
JOptionPane.showInputDialog("Enter first integer" );
// read in second number from user as a string
secondNumber =
JOptionPane.showInputDialog("Enter second integer" );
// convert numbers from type String to type int
number1 = Integer.parseInt( firstNumber );
number2 = Integer.parseInt( secondNumber );
// add the numbers
sum = number1 + number2;
// display the results
JOptionePane.showMessageDialog(
null, "The sum is " + sum, "Results",
JOptionPane.PLAIN.MESSAGE );
System.exit ( 0 ); // terminate the program
}
}
--------------------------------------------------------------------------
I get the following:
at java.lang.Throwable.<init>.(Throwable.java:40)
at java.lang.Error.<init>(Error.java:21)
at java.lang.LinkageError.<init>(LinkageError.java:21)
at java.lang. NoClassDefFoundError.<init>(NoClassDefFound Error.java:21)
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