Hello friends, i have a problems with this one, i don't know if my codes are incorrect or my J2SDK has a problem, I've always receive an error, but i think my codes are correct



import javax.swing.*;
public class grades{
grades(){

int g1=Integer.parseInt(JOptionPane.showInputDialog("Enter grade in Prelim"));
int g2=Integer.parseInt(JOptionPane.showInputDialog("Enter grade in Midterm"));
int g3=Integer.parseInt(JOptionPane.showInputDialog("Enter grade in Prefinal"));
int g4=Integer.parseInt(JOptionPane.showInputDialog("Enter grade in Final"));

int avegrade=(g1+g2+g3+g4*2)/5;

if (avegrade>=95){
JOptionPane.showMessageDialog(null,"A");
}
elseif (avegrade>=90){
JOptionPane.showMessageDialog(null,"B");
}
elseif (avegrade>=85){
JOptionPane.showMessageDialog(null,"C");
}
elseif (avegrade>=80){
JOptionPane.showMessageDialog(null,"D");
}
elseif (avegrade>=75){
JOptionPane.showMessageDialog(null,"E");
}
else{
JOptionPane.showMessageDialog(null,"F");
}

System.exit(0);
}
public static void main(String[] args){
new grades();
}
}




And this is the second one


import javax.swing.*;
public class calling{
calling(){

int time=Integer.parseInt(JOptionPane.messageInputDialog("1 - Day time \n2-Night time"));

double am,aus,eu,as;

switch (time){
case 1:
am=5;
eu=10;
as=10
aus=12.50;
case 2:
am=3.33;
eu=7.50;
as=8.75;
aus=10;
}

int desti=Integer.parseInt(JOptionPane.messageInputDialog("Enter destination\n1-America\n2-Europe\n3-Asia\n4-Australia "));

switch (desti){
case 1: desti=am;
break;
case 2: desti=eu;
break;
case 3: desti=as;
break;
case 4: desti=aus;
break;
}

int mins=Integer.parseInt(JOptionPane.messageInputDialog("Enter duration of calls in minutes"));
double pay=(double)mins*desti;
JOptionPane.messageDialog(null,"Cost of calls"+pay);

System.exit(0);
{

public static void main(String args[]){
new calling();
}
}


Thanks...

hi, in the first program

is not the way you write it. else if is the right way, with a blank in between them.

in the second program there are more errors.

shouldn't be
showInputDialog instead *check your first program.
that goes for the rest of the same errors.


here
= > showMessageDialog

Check the brackets I think there are problems there too.
Yeah and I don't think you can create an object like that in the main.
= > calling obj = new calling();