public class GradeSystem {
public static void main (String args[]) {
........
public int searchStu(int id){ // problem happen
int i=0;
for (i=0; i<4; i++) {
if (student[i].getStudentID() == id) return i;}
return i;}
int id;
boolean d;
id = Integer.parseInt(JOptionPane.showInputDialog("Please input ID number : ",
JOptionPane.QUESTION_MESSAGE));
d = Student.isStudent(id);
if (id == 1132810){
int q=0;
do{
id = Integer.parseInt(JOptionPane.showInputDialog("Please input student number : ",JOptionPane.QUESTION_MESSAGE));
d = Student.isStudent(id);
if (d){ int index = searchStu(id);q=2;}
else {
JOptionPane.showMessageDialog(.......); q=1;}
}while(q==1);
teacher.teacherFunction();}
else if (d){
int index = searchStu(id);
Student.studentFunction();}
else
JOptionPane.showMessageDialog(........);
}
} //end main class
}
public void check()
{
System.out.println("Please Pay $");
}
}
public class object4
{
public void main(String [] args)
{
waiter ourwaiter;
ourwaiter = new waiter("jeff");
double x;
double y;
x = ourwaiter.priceof("burger");
y = ourwaiter.priceof("Chicken");
if(x<y)
{
System.out.println("i'll gonna take the burger coz it's cheaper");
ourwaiter.order(burger);
}
else
{
System.out.println("i'll take the chicken");
ourwaiter.order("chicken");
}
System.out.println("and i'll have fries with that");
ourwaiter.order("Fries");
System.out.println("\n eat......\n");
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