Java Terminal Only Printing Output From First Command

Java Terminal Only Printing Output From First Command

EDIT: The code now works! Here's how I did it:
package me.nrubin29.jterminal;
import javax.swing.*;
import javax.swing.filechooser.FileSystemView;
import javax.swing.text.SimpleAttributeSet;
import javax.swing.text.StyleConstants;
import java.awt.*;
import java.awt.event.KeyEvent;
import java.awt.event.KeyListener;
import java.io.*;
import java.util.ArrayList;
public class JTerminal extends JFrame {
private JTextPane area = new JTextPane();
private JTextField input = new JTextField("Input");
private SimpleAttributeSet inputSAS = new SimpleAttributeSet(), output
= new SimpleAttributeSet(), error = new SimpleAttributeSet();
private File workingFolder =
FileSystemView.getFileSystemView().getDefaultDirectory();
public JTerminal() throws IOException {
super("JTerminal");
getContentPane().setLayout(new BoxLayout(getContentPane(),
BoxLayout.Y_AXIS));
StyleConstants.setForeground(inputSAS, Color.GREEN);
StyleConstants.setBackground(inputSAS, Color.BLACK);
StyleConstants.setForeground(output, Color.WHITE);
StyleConstants.setBackground(output, Color.BLACK);
StyleConstants.setForeground(error, Color.RED);
StyleConstants.setBackground(error, Color.BLACK);
input.addKeyListener(new KeyListener() {
public void keyPressed(KeyEvent e) {
if (e.getKeyCode() == KeyEvent.VK_ENTER) {
try {
String command = input.getText();
if (command.equals("")) return;
setTitle("JTerminal (" + command.split(" ")[0] +
")");
input.setText("");
input.setEditable(false);
write(inputSAS, command);
Process bash = new
ProcessBuilder("bash").directory(workingFolder).start();
OutputStreamWriter outputStreamWriter = new
OutputStreamWriter(bash.getOutputStream());
outputStreamWriter.write(command);
outputStreamWriter.close();
int code = bash.waitFor();
writeStream(bash.getErrorStream(), error);
writeStream(bash.getInputStream(), output);
input.setEditable(true);
setTitle("JTerminal");
if (code == 0 && command.split(" ").length > 1)
workingFolder = new File(command.split(" ")[1]);
} catch (Exception ex) { error(ex); }
}
}
public void keyTyped(KeyEvent e) {}
public void keyReleased(KeyEvent e) {}
});
area.setBackground(Color.black);
area.setCaretColor(Color.green);
area.setFont(new Font(Font.MONOSPACED, Font.PLAIN, 14));
area.setEditable(false);
JScrollPane pane = new JScrollPane(area);
pane.setBorder(BorderFactory.createLineBorder(Color.GREEN));
pane.setHorizontalScrollBarPolicy(JScrollPane.HORIZONTAL_SCROLLBAR_AS_NEEDED);
pane.setVerticalScrollBarPolicy(JScrollPane.VERTICAL_SCROLLBAR_AS_NEEDED);
pane.setPreferredSize(new Dimension(640, 460));
input.setBackground(Color.black);
input.setForeground(Color.green);
input.setCaretColor(Color.green);
input.setFont(new Font(Font.MONOSPACED, Font.PLAIN, 14));
input.setBorder(BorderFactory.createLineBorder(Color.GREEN));
add(pane);
add(input);
Dimension DIM = new Dimension(640, 480);
setPreferredSize(DIM);
setSize(DIM);
setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
setLocationRelativeTo(null);
setResizable(true);
pack();
setVisible(true);
input.requestFocus();
}
public static void main(String[] args) throws IOException {
new JTerminal();
}
private void write(SimpleAttributeSet attributeSet, String... lines) {
try {
if (lines.length == 0) return;
for (String line : lines) {
area.getStyledDocument().insertString(area.getStyledDocument().getLength(),
line + "\n", attributeSet);
}
area.getStyledDocument().insertString(area.getStyledDocument().getLength(),
"\n", attributeSet);
}
catch (Exception e) { error(e); }
}
private void error(Exception e) {
write(error, "An error has occured: " + e.getLocalizedMessage());
e.printStackTrace(); //TODO: temp.
}
private void writeStream(InputStream s, SimpleAttributeSet color) {
try {
BufferedReader reader = new BufferedReader(new
InputStreamReader(s));
ArrayList<String> strs = new ArrayList<String>();
while(reader.ready()) strs.add(reader.readLine());
if (strs.size() > 0) write(color, strs.toArray(new
String[strs.size()]));
}
catch (Exception e) { error(e); }
}
}



I have been working on a Java terminal application. It works except that
it only prints the output of the first command. Here's a picture of the
GUI when I try to run ls more than once.

package me.nrubin29.jterminal;
import javax.swing.*;
import javax.swing.text.SimpleAttributeSet;
import javax.swing.text.StyleConstants;
import java.awt.*;
import java.awt.event.KeyEvent;
import java.awt.event.KeyListener;
import java.io.*;
import java.util.ArrayList;
public class JTerminal extends JFrame {
private JTextPane area = new JTextPane();
private JTextField input = new JTextField("Input");
private SimpleAttributeSet inputSAS = new SimpleAttributeSet(), output
= new SimpleAttributeSet(), error = new SimpleAttributeSet();
public JTerminal() throws IOException {
super("JTerminal");
getContentPane().setLayout(new BoxLayout(getContentPane(),
BoxLayout.Y_AXIS));
StyleConstants.setForeground(inputSAS, Color.GREEN);
StyleConstants.setBackground(inputSAS, Color.BLACK);
StyleConstants.setForeground(output, Color.WHITE);
StyleConstants.setBackground(output, Color.BLACK);
StyleConstants.setForeground(error, Color.RED);
StyleConstants.setBackground(error, Color.BLACK);
final Process bash = new ProcessBuilder("/bin/bash").start();
input.addKeyListener(new KeyListener() {
public void keyPressed(KeyEvent e) {
if (e.getKeyCode() == KeyEvent.VK_ENTER) {
try {
String command = input.getText();
if (command.equals("")) return;
setTitle("JTerminal (" + command.split(" ")[0] +
")");
input.setText("");
input.setEditable(false);
write(inputSAS, command);
OutputStreamWriter outputStreamWriter = new
OutputStreamWriter(bash.getOutputStream());
outputStreamWriter.write(command);
outputStreamWriter.close();
bash.waitFor();
writeStream(bash.getErrorStream(), error);
writeStream(bash.getInputStream(), output);
input.setEditable(true);
setTitle("JTerminal");
} catch (Exception ex) { error(ex); }
}
}
public void keyTyped(KeyEvent e) {}
public void keyReleased(KeyEvent e) {}
});
area.setBackground(Color.black);
area.setCaretColor(Color.green);
area.setFont(new Font(Font.MONOSPACED, Font.PLAIN, 14));
area.setEditable(false);
JScrollPane pane = new JScrollPane(area);
pane.setBorder(BorderFactory.createLineBorder(Color.GREEN));
pane.setHorizontalScrollBarPolicy(JScrollPane.HORIZONTAL_SCROLLBAR_AS_NEEDED);
pane.setVerticalScrollBarPolicy(JScrollPane.VERTICAL_SCROLLBAR_AS_NEEDED);
pane.setPreferredSize(new Dimension(640, 460));
input.setBackground(Color.black);
input.setForeground(Color.green);
input.setCaretColor(Color.green);
input.setFont(new Font(Font.MONOSPACED, Font.PLAIN, 14));
input.setBorder(BorderFactory.createLineBorder(Color.GREEN));
add(pane);
add(input);
Dimension DIM = new Dimension(640, 480);
setPreferredSize(DIM);
setSize(DIM);
setDefaultCloseOperation(WindowConstants.EXIT_ON_CLOSE);
setLocationRelativeTo(null);
setResizable(true);
pack();
setVisible(true);
input.requestFocus();
}
public static void main(String[] args) throws IOException {
new JTerminal();
}
private void write(SimpleAttributeSet attributeSet, String... lines) {
try {
area.getStyledDocument().insertString(area.getStyledDocument().getLength(),
"\n", attributeSet);
for (String line : lines) {
area.getStyledDocument().insertString(area.getStyledDocument().getLength(),
line + "\n", attributeSet);
}
}
catch (Exception e) { error(e); }
}
private void error(Exception e) {
write(error, "An error has occured: " + e.getLocalizedMessage());
e.printStackTrace(); //TODO: temp.
}
private void writeStream(InputStream s, SimpleAttributeSet color) {
try {
BufferedReader reader = new BufferedReader(new
InputStreamReader(s));
ArrayList<String> strs = new ArrayList<String>();
while(reader.ready()) strs.add(reader.readLine());
if (strs.size() > 0) write(color, strs.toArray(new
String[strs.size()]));
}
catch (Exception e) { error(e); }
}
}