Commad

/**
 * 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
    }
}