class and application - question about switch case and loop
Hi there! I am working on a project for class and I was wondeirng if someone might could look at my loop below and my switch case. I think I might have my loop in the wrong place because i have to have the original JOptionPane box pop up after each one in the actual swtich case, if that makes sense. That is not working and as I said I believe it is because I have the loop in the wrong place and also inside my switch case for exampe on case 3 the user must enter in the length of the reactangle, but when i enter that number in JOptionPane the next dialog box is not popping up. Does that have to do with the loop, or do I something written wrong inside that case? I am not to sure what to change or add, any ideas? Below is my class first and then my actually app. I put it all on here so that you knew what I was trying to do, if anything didnt make sense at all just let me know and I will explain better. I apprecaite it.
App:
//
// application using the Rectangle class
// demonstrate the use of the class with this app
import javax.swing.*;
publicclass RectangleApp
{
publicstaticvoid main( String[] arg )
{
int length = 0;
int l = 0;
int breadth = 0;
int b = 0;
int area = 0;
int perimeter = 0;
int input;
finalint SENT = 0;
//declaring a Rectangle object
Rectangle rect;
//initialize the object
rect =new Rectangle( );
//dialog box with options 0-7 to enter in rectangle attributes
input = Integer.parseInt( JOptionPane.showInputDialog(
"Please enter one of the following:\n"
+"1 - to set the length\n"
+"2 - to set the breadth\n"
+"3 - to get the length\n"
+"4 - to get the breadth\n"
+"5 - to get the perimeter\n"
+"6 - to get the area\n"
+"7 - to print the object as string\n"
+"0 - to quit\n" ) );
//loop that ends when user enters 0
while ( input != 0 )
{
switch ( input )
{
case 0:
System.exit(0);
break;
case 1: rect.setlength( l );
JOptionPane.showMessageDialog( null,
"The length is set at " + length );
break;
case 2: rect.setbreadth( b );
JOptionPane.showMessageDialog( null,
"The breadth is set at " + breadth );
break;
case 3: length = Integer.parseInt(
"Please enter the length of the Rectangle:");
break;
case 4:breadth = Integer.parseInt(
"Please enter the breadth of the Rectangle:");
break;
case 5: JOptionPane.showMessageDialog( null,
"The perimeter of the Rectangle is " + perimeter +"." );
break;
case 6: JOptionPane.showMessageDialog( null,
"The area of the Rectangle is " + area +"." );
break;
case 7: JOptionPane.showMessageDialog( null,
rect );
break;
}
}
}
}
Class:
//
// class to store information
// about a rectangle
publicclass Rectangle
{
//attributes
privateint length;
privateint breadth;
int area = 0;
int perimeter = 0;
//default constructor - overriding default constructor
public Rectangle()
{
length = 0;
breadth = 0;
}
//overload the constructor
public Rectangle(int l,int b )
{
setlength( l );
setbreadth( b );
}
//accessor methods or selector methods
publicint getlength( )
{
return length;
}
publicint getbreadth( )
{
return breadth;
}
publicint getarea(int b,int l )
{
area = l * b;
return area;
}
publicint getperimeter(int b,int l )
{
perimeter = ( l * 2 ) + ( b * 2 );
return perimeter;
}
publicint setlength(int l )
{
length = l;
return l;
}
publicint setbreadth(int b )
{
breadth = b;
return b;
}
public String toString( )
{
return"The Rectangle has a length of " + length +" and a breadth of " + breadth +".";
}
}
