void printOwing() {
printBanner();
//print details
System.out.println ("name: " + _name);
System.out.println ("amount " + getOutstanding());
}

void printOwing() {
printBanner();
printDetails(getOutstanding());
}
void printDetails (double outstanding) {
System.out.println ("name: " + _name);
System.out.println ("amount " + outstanding);
}
For more information see page 110 of Refactoring