Java编写的Java编辑器_JavaIDE
一、JavaIDE效果图
原理：调用系统cmd的javac和java命令
二、java源码
import java.awt.CardLayout; import java.awt.Color; import java.awt.GridLayout; import java.awt.event.ActionEvent; import java.awt.event.ActionListener; import java.awt.event.WindowAdapter; import java.awt.event.WindowEvent; import java.io.BufferedInputStream; import java.io.File; import java.io.FileOutputStream; import java.io.InputStream; import javax.swing.JButton; import javax.swing.JFrame; import javax.swing.JLabel; import javax.swing.JPanel; import javax.swing.JTextArea; import javax.swing.JTextField; public class JavaIDE { public static void main(String[] args) { FileWindow win = new FileWindow(); win.pack(); win.addWindowListener(new WindowAdapter() { public void windowClosing(WindowEvent e) { System.exit(0); } }); win.setBounds(200, 180, 550, 360); win.setVisible(true); } } @SuppressWarnings("serial") class FileWindow extends JFrame implements ActionListener, Runnable { Thread compiler = null; Thread run_prom = null; boolean bn = true; CardLayout mycard; File file_saved = null; JButton button_input_text, button_compiler_text, button_compiler, button_run_prom, button_see_doswin; JPanel p = new JPanel(); JTextArea input_text = new JTextArea(); JTextArea compiler_text = new JTextArea(); JTextArea dos_out_text = new JTextArea(); JTextField input_file_name_text = new JTextField(); JTextField run_file_name_text = new JTextField(); public FileWindow() { super("JavaIDE"); mycard = new CardLayout(); compiler = new Thread(this); run_prom = new Thread(this); button_input_text = new JButton("ProgramInput(white)"); button_compiler_text = new JButton("Compiler(pick)"); button_see_doswin = new JButton("Run(blue)"); button_compiler = new JButton("compiler"); button_run_prom = new JButton("run"); p.setLayout(mycard); p.add("input", input_text); p.add("compiler", compiler_text); p.add("dos", dos_out_text); add(p, "Center"); compiler_text.setBackground(Color.pink); dos_out_text.setBackground(Color.cyan); JPanel p1 = new JPanel(); p1.setLayout(new GridLayout(3, 3)); p1.add(button_input_text); p1.add(button_compiler_text); p1.add(button_see_doswin); p1.add(new JLabel("Input File Name(.java):")); p1.add(input_file_name_text); p1.add(button_compiler); p1.add(new JLabel("Input Class Name")); p1.add(run_file_name_text); p1.add(button_run_prom); add(p1, "North"); button_input_text.addActionListener(this); button_compiler_text.addActionListener(this); button_compiler.addActionListener(this); button_run_prom.addActionListener(this); button_see_doswin.addActionListener(this); } public void run() { if (Thread.currentThread() == compiler) { compiler_text.setText(null); String temp = input_text.getText().trim(); byte[] buffer = temp.getBytes(); int b = buffer.length; String file_name = null; file_name = input_file_name_text.getText().trim(); try { file_saved = new File(file_name); FileOutputStream writefile = null; writefile = new FileOutputStream(file_saved); writefile.write(buffer, 0, b); writefile.close(); } catch (Exception e) { System.out.println("ERROR"); } try { Runtime rt = Runtime.getRuntime(); InputStream in = rt.exec("javac " + file_name).getErrorStream(); BufferedInputStream bufIn = new BufferedInputStream(in); byte[] shuzu = new byte[100]; int n = 0; boolean flag = true; while ((n = bufIn.read(shuzu, 0, shuzu.length)) != -1) { String s = null; s = new String(shuzu, 0, n); compiler_text.append(s); if (s != null) { flag = false; } } if (flag) { compiler_text.append("Compiler Succeed!"); } } catch (Exception e) { e.printStackTrace(); } } else if (Thread.currentThread() == run_prom) { dos_out_text.setText(null); try { Runtime rt = Runtime.getRuntime(); String path = run_file_name_text.getText().trim(); Process stream = rt.exec("java " + path); InputStream in = stream.getInputStream(); BufferedInputStream bisErr = new BufferedInputStream(stream.getErrorStream()); BufferedInputStream bisIn = new BufferedInputStream(in); byte[] buf = new byte[150]; byte[] err_buf = new byte[150]; @SuppressWarnings("unused") int m = 0; @SuppressWarnings("unused") int i = 0; String s = null; String err = null; while ((m = bisIn.read(buf, 0, 150)) != -1) { s = new String(buf, 0, 150); dos_out_text.append(s); } while ((i = bisErr.read(err_buf)) != -1) { err = new String(err_buf, 0, 150); dos_out_text.append(err); } } catch (Exception e) { } } } public void actionPerformed(ActionEvent e) { if (e.getSource() == button_input_text) { mycard.show(p, "input"); } else if (e.getSource() == button_compiler_text) { mycard.show(p, "compiler"); } else if (e.getSource() == button_see_doswin) { mycard.show(p, "dos"); } else if (e.getSource() == button_compiler) { if (!(compiler.isAlive())) { compiler = new Thread(this); } try { compiler.start(); } catch (Exception e2) { e2.printStackTrace(); } mycard.show(p, "compiler"); } else if (e.getSource() == button_run_prom) { if (!(run_prom.isAlive())) { run_prom = new Thread(this); } try { run_prom.start(); } catch (Exception e2) { e2.printStackTrace(); } mycard.show(p, "dos"); } } }
三、注意事项
1、原理是调用系统jdk的javac（编译）和java（运行）命令
所以在程序中尽量不要出现中文汉字的GBK编码
2、由于java(运行)的命令的找寻原理，在CLASSPATH中有寻找路径，所以运行时可能会出现找不到主类的error
2.1、如果希望它查询当前目录，需要在CLASSPATH中加入“.;”,代表当前目录。
在CLASSPATH中添加：,;C:\Program Files (x86)\Java\jdk1.8.0_131\lib;;%JAVA_HOME%\lib\tools.jar
2.2、删除包名package
3、程序运行成功会在同目录下创建文件和相应的编译后.class文件
