Java Applet

[Illegalx17]

hey, this isnt as much for other people to use, as its so easy, but this is a java applet i just finished for school. seems like a really simple concept but it was actually extremely hard for me to do. i had some problems with the gui and stuff, and im still a noob at java. plz tell me what you think. heres the code:

import java.awt.*;
import java.awt.event.*;
import javax.swing.*;


public class SortArray extends JApplet implements ActionListener {
JButton setButton, checkButton, resetButton;
JTextField setField;
String arrayLengthinput = "";
int arrayLengthInput = 0;
String Input = "";
int small = 1000000000;
int large = -99999999;
String array2Sorted = "";
int R = 0;
int array2[];
int array[];
int y = 0;
public void init()
{
	Container container = getContentPane();
	container.setLayout( new FlowLayout() );

	setField = new JTextField( 15 );
	setField.setEditable( false );
	container.add( setField );

	setButton = new JButton( "Set Values" );
	setButton.addActionListener( this );
	container.add( setButton );

	checkButton = new JButton( "Check" );
	checkButton.addActionListener( this );
	container.add( checkButton );

	resetButton = new JButton( "Reset" );
	resetButton.addActionListener( this );
	container.add( resetButton );

	setField.setText( "Values Not Set" );
}
public void actionPerformed( ActionEvent event )
{
	if( event.getSource() == setButton )
	Mod1();
	if( event.getSource() == resetButton )
	Clear();
	if( event.getSource() == checkButton ){
 *if( arrayLengthInput == 0 ){
 *setField.setText( "Please Set Values First" );
 *}else{
 *Sort();
 *Show();
	}
	}
}


public void Mod1()
{
large = -99999999;
arrayLengthinput = JOptionPane.showInputDialog( "How many numbers will you be entering?" );
arrayLengthInput = Integer.parseInt( arrayLengthinput );
array = new int[arrayLengthInput];
array2 = new int[array.length];
for( int r = 0; r < array.length; r++ ) {
	R = r + 1;
	if( r == 0 && R != array.length )
	Input = JOptionPane.showInputDialog( "Please enter the first number. *This will be your first number");
	if( r == 0 && R == array.length )
	Input = JOptionPane.showInputDialog( "You have chosen to enter only one number. *Please enter your first and last number.");
	if( R == array.length && r != 0 )
	Input = JOptionPane.showInputDialog( "Please enter the last number. *This will be your last number" );
	if( r != 0 && R != array.length )
	Input = JOptionPane.showInputDialog( "Please enter the next number. *This will be number " + R + " of the " + array.length + " numbers you decided to input" );
	setField.setText( "Values Set" );
	array[r] = Integer.parseInt( Input );
}
array2Sorted = "";
}


public void Clear()
{
large = -99999999;
arrayLengthinput = "";
arrayLengthInput = 0;
for( int x = 0; x < array.length; x++ )
array[x] = 0;
for( int X = 0; X < array2.length; X++ )
array2[X] = 0;
small = 1000000000;
array2Sorted = "";
setField.setText( "Values Not Set" );
}


public void Sort()
{
for( int Q = 0; Q < array.length; Q++ ){
for( int q = 0; q < array.length; q++ ){
if( array[q] < small ){
small = array[q];
}
}
for( int e = 0; e < array.length; e++ ){
	if( array[e] == small )
	array[e] = 1000000000;
}
if( small < 1000000000 )
array2[Q] = small;
small = 1000000000;
}
}
public void Show()
{
	for( int T = 0; T < array2.length; T++ ){
 *if( array2[T] > large )
 *large = array2[T];
	}
	for( int E = 0; E < array2.length; E++ ){
 *if( array2[E] != 0 ){
 *array2Sorted += array2[E];
 *if( array2[E] != large )
 *array2Sorted += ", ";
	}
	}
	JOptionPane.showMessageDialog( null, "Your numbers, in order from least to greatest:\n\n" + array2Sorted );
}
}

and you can see the applet in action Here

[ROTD]

Long......*scrolls down page*

[Illegalx17]

lol thanx, the end result wasnt that great tho but i think its one of the better pieces of coding i've done.

[MetalSkin]

strange i got an exception about the Array version.... i'm running 1.4.1 JVM as the Web JVM, what version was it written in?

[Illegalx17]

hmmm. . .idk what you mean about the array version, im using jdk 1.5.0

[MetalSkin]

ahh, i c. u have used some of the later funtionality. very nice mate... nothing like a good sort.

If you want to go the next step, start reading up on Collections. You coudl change your code to use a collection, add each entry to the collection and then sort the collection. Some collections have self ordering. Only problem with a collection is that you can only add an object, so it would be an Integer not an int that you add.

Otherwise you could make a generic Class call it Value, implement java.lang.Comparable. thus you could test for the types of objects being compared and then compare appropriatly. thus you could mix both int, string, decimal.

[Illegalx17]

whoa, im not near that far im in a java class, and im not that great at java. i dont get what you mean about objects. . .theres such thing as type Integer?

[MetalSkin]

hehe... okay... reboot!

In all Object based lanugages or OOPS, you have primitives and objects. In jave we have:

boolean - true or false
char - one byte of data, unsigned
byte - one byte of data signed
int - integer, non factional
long - same as integer just goes bigger
float - factional version of int
double - factional version of long

now in these you can access with code just like:

 * *boolean bo = true;
 * *char c = 'a';
 * *byte b = 0x03;
 * *int i = 0;
 * *long l = 0l;
 * *float f = 0.0f;
 * *double d = 0.0d;

Now for each primitive there is a corresponding 'wrapper' class, to allow you to perform operations on them as you would an object. They are all under java.lang.*. For example:

 * *Boolean bo = new Boolean(true);
 * *Byte b = new Byte('a');
 * *Character c = new Character('a');
 * *Integer i = new Integer(0);
 * *Long l = new Long(0);
 * *Float f = new Float(0.0f);
 * *Double d = new Double(0.0);

now as a object, you can use them in collections, you can use the Comparator Intereface, which requires and object and a whole heap of other things. Generaly you would use primiatives, cause you cannot perform math operations on objects (but you could in c++).

So when you create a collection, you can store in it any object.

[Illegalx17]

ok i kinda get it, we are almost to that chapter in my class, so i will learn all about that soon.

[Relentless]

Ok, dude I love it. It can help me with my homework