View difference between Paste ID: 0wSKDk2t and jd5a3A5B

 /**
  * Feel free to change/modify this if you know how,
  * but please don't distribute it without giving me credit!
  * Do the right thing!
  *
  * Creator: dankydrank
  * Jan 11, 2014
  */
 
 import javax.swing.*;
 import java.awt.*;
 import java.awt.event.*;
 import java.awt.datatransfer.*;
 
 public class CommandCompressor implements KeyListener, ActionListener
 {
 	private JFrame frame;
 	private JTextArea input, output;
 
 	public static void main(String[]args)
 	{
 		//call CommandCompressor's constructor
 		new CommandCompressor();
 	}
 
 	public CommandCompressor()
 	{
 		//instructions
 		JLabel instructions = new JLabel("Press the Button to Convert Your Text and Copy It. Place each command on a new line.");
 		JLabel outputLabel = new JLabel("Output:");
 		//button
 		JButton copy = new JButton("Convert and Copy to Clipboard");
 		//frame
 		frame = new JFrame("Command Compressor");
 		//Just the sizes I found best
 		input = new JTextArea(13, 31);
 		output = new JTextArea(13, 23);
 		//turn JTextAreas into JScrollPanes for window scrolling
 		JScrollPane outPane = new JScrollPane(output);
 		JScrollPane inPane = new JScrollPane(input);
 		//add Key Listeners
 		input.addKeyListener(this);
 		output.addKeyListener(this);
 		//user can't edit output pane
 		output.setEditable(false);
 		//output text wraps within the pane
 		output.setLineWrap(true);
 		//add listener to button
 		copy.addActionListener(this);
 		//FlowLayout works best
 		frame.setLayout(new FlowLayout());
 		//add components
 		frame.add(instructions);
 		frame.add(inPane);
 		frame.add(outputLabel);
 		frame.add(outPane);
 		frame.add(copy);
 		//set frame size and visibility
 		frame.setSize(675, 325);
 		frame.setVisible(true);
 		//set default close operation
 		frame.setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
 	}
 
 	public void keyPressed(KeyEvent e) {
 		//I updated the app so you no longer need to press F3, but it still works. F3's key code is 114
 		int key = e.getKeyCode();
 		//check for F3
 		if(key==114)
 			generateAndCopy();
 	}
 
 	public void actionPerformed(ActionEvent e)
 	{
 		generateAndCopy();
 	}
 
 	public void generateAndCopy()
 	{
 		//instantiate string
 		String s = "summon MinecartCommandBlock ~ ~1 ~ {";
 		//split text from input window into array--each element is one line of input
 		String[] lines = input.getText().split("\n");
 		//for each command the player entered, add "Riding:}id:MinecartCommandBlock," to the output string
 		for(int i = 0; i < lines.length; i++)
 			s+= "Riding:{id:MinecartCommandBlock,";
 		//rail
 		s+= "Riding:{id:FallingSand,TileID:157,Time:1}";
 		//loop over output string and add commands from lines[]
 		for(String temp : lines)
 		{
 			if(temp != null)
 				s+= ",Command:" + temp + "}";
 		}
 		//add lava to the end
 		s+= ",Command:setblock ~ ~ ~ lava 7}";
 		//set text in window to the output string
 		output.setText(s);
 		//copy text to clipboard
 		StringSelection selection = new StringSelection(output.getText());
 		Clipboard clipboard = Toolkit.getDefaultToolkit().getSystemClipboard();
 		clipboard.setContents(selection, selection);
 	}
 
 	public void keyReleased(KeyEvent e)
 	{
 		//Do nothing
 	}
 
 	public void keyTyped(KeyEvent e)
 	{
 		//Do nothing
 	}
 }