Sometimes it is useful to know if Swing is installed in a Java environment
or not, especially if you are dealing with browsers. You can simply try to
create a Swing component, as in:
try
{
javax.swing.JButton jBtn = new javax.swing.JButton
("a button");
System.out.println("Swing is installed");
jBtn = null;
}
catch(NoClassDefFoundError e)
{
System.out.println("Swing is not here,
you must download or install
it");
}
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