
What is wrong with this line JOptionPane.showMessageDialog(null? for Using Lewandowski's Savings pgrm!");
from
if (input.equals("exit") || input.equals("Exit")) { JOptionPane.showMessageDialog(null? for Using Lewandowski's Savings pgrm!"); System.exit(0); }

You have not written the code in proper format. Here is your modified code.
if (input.equals("exit") || input.equals("Exit"))
{
JOptionPane.showMessageDialog(null,"for Using Lewandowski's Savings pgrm!");
System.exit(0);
}
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