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POA java apprentice trying to migrate from System.out.println to swing
 

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    <p>I'm finally trying to migrate my old console programs to Swing, to make distribution to my friends easier. To this end, I'm trying to write a class ConsoleFrame that I can extend instead of JFrame, that will allow me to interface my old code with Swing as effortlessly as possible. out(String) appears to be working, but inln() has me stumped.</p> <pre><code>//Imports not included public class ConsoleFrame extends JFrame { protected JTextField in; protected JTextArea out; public ConsoleFrame(){ this("Console Frame", 80, 10); } public ConsoleFrame(int cols){ this("Console Frame", cols, 10); } public ConsoleFrame(int cols, int rows){ this("Console Frame", cols, rows); } public ConsoleFrame(String title){ this(title, 80, 10); } public ConsoleFrame(String title, int cols, int rows){ in = new JTextField(); in.setEditable(true); in.setColumns(cols); out = new JTextArea(); out.setEditable(false); out.setColumns(cols); out.setRows(rows); out.setWrapStyleWord(true); setTitle(title); setVisible(true); setDefaultCloseOperation(EXIT_ON_CLOSE); add(in, BorderLayout.PAGE_END); add(out, BorderLayout.PAGE_START); pack(); } protected void out(String o) { out.append(o); } protected void outln(String o) { out(o + BIO.$ln); //BIO.$ln == System.getProperty("line.separator") } /* * This is supposed to halt execution until the user presses enter, then return the text entered in the JTextField named in. */ protected String inln() { in.setEnabled(true); KeyListener enter = new KeyListener() { @Override public void keyTyped(KeyEvent paramKeyEvent) { if(paramKeyEvent.getKeyCode() == KeyEvent.VK_ENTER) { if(in.hasFocus()) { in.setEnabled(false); } } } @Override public void keyPressed(KeyEvent paramKeyEvent) {} @Override public void keyReleased(KeyEvent paramKeyEvent) {} }; in.addKeyListener(enter); while(true){ //This loop is intended to interrupt flow until in.isEnabled()==false, which will only happen when the enter key is typed. if(in.isEnabled()==false){ String result = in.getText(); in.setText(""); in.setCaretPosition(0); this.removeKeyListener(enter); in.setEnabled(true); return result; } } } } </code></pre> <p>Tester program:</p> <pre><code>public class Tester extends ConsoleFrame { public static void main(String[] args) { new Tester(); } public Tester() { super("Test", 60, 30); out(inln()); } } </code></pre>
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