javaedit.java

超小超简单的java编译器

import java.awt.*;
import java.io.*;
import java.awt.event.*;
public class JavaEdit
{
	public static void main(String args[])
	{
		JDK f=new JDK();
	}
}

class JDK extends Frame
implements ActionListener,Runnable
{
	Thread compiler=null;
	Thread run_prom=null;
	boolean bn=true;
	CardLayout mycard;
	Panel p=new Panel();
	File file_saved=null;
	TextArea input_text=new TextArea(),
	compiler_text=new TextArea(),
	dos_out_text=new TextArea();
	
	Button button_input_text,button_compiler_text,
	button_compiler,button_run_prom,button_see_doswin;
	TextField input_file_name_text=new TextField("输入被编译的文件名字.java");
	TextField run_file_name_text=new TextField("输入应用程序主类的名字");
	JDK()
	{
		super("JAVA集成环境 烂尾楼工作室 ver1.0");
		mycard=new CardLayout();
		compiler=new Thread(this);
		run_prom=new Thread(this);
		button_input_text=new Button("代码编辑区");
		button_compiler_text=new Button("编译结果区");
		button_compiler=new Button("编译");
		button_run_prom=new Button("运行");
		button_see_doswin=new Button("查看流输出信息");
		p.setLayout(mycard);
		p.add("input",input_text);
		p.add("compiler",compiler_text);
		p.add("dos",dos_out_text);
		add(p,"Center");
		add(button_see_doswin,"South");
		compiler_text.setBackground(Color.white);
		Panel p1=new Panel();
		p1.setLayout(new GridLayout(4,2));
		p1.add(new Label("输入代码："));
		p1.add(button_input_text);
		p1.add(new Label("编译："));
		p1.add(button_compiler_text);
		p1.add(input_file_name_text);
		p1.add(button_compiler);
		p1.add(run_file_name_text);
		p1.add(button_run_prom);
		add(p1,BorderLayout.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);
		addWindowListener(new WindowAdapter()
		{
			public void windowClosing(WindowEvent e)
			{
				System.exit(0);
			}
		});
		setBounds(100,120,700,360);
		setVisible(true);
		validate();
	}
	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 eee){}
			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 eee){}
			mycard.show(p,"dos");
		}
	}
	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=input_file_name_text.getText().trim();
			try
			{
				file_saved=new File(file_name);
				FileOutputStream writefile=new FileOutputStream(file_saved);
				writefile.write(buffer,0,b);
				writefile.close();
			}
			catch(IOException e5)
			{
				System.out.println("Error ");
			}
			try
			{
				Runtime ce=Runtime.getRuntime();
				InputStream in=ce.exec("javac "+file_name).getErrorStream();
				BufferedInputStream bin=new BufferedInputStream(in);
			  byte shuzu[]=new byte[100];
			  int n;
			  boolean bn=true;
			  while((n=bin.read(shuzu,0,100))!=-1)
			  {
			  	String s=null;
			  	s=new String(shuzu,0,n);
			  	compiler_text.append(s);
			  	if(s!=null)
			  		bn=false;
			  }
			  if(bn)
			  {
			  	compiler_text.append("编译成功");
			  }
			}
			catch(IOException e1){}
		}
		else if(Thread.currentThread()==run_prom)
		{
			dos_out_text.setText(null);
			try
			{
				Runtime ce=Runtime.getRuntime();
				String path=run_file_name_text.getText().trim();
				InputStream in=ce.exec("java "+path).getInputStream();
				BufferedInputStream bin=new BufferedInputStream(in);
				byte zu[]=new byte[150];
				int m;
				String s=null;
				while((m=bin.read(zu,0,150))!=-1)
				{
					s=new String(zu,0,m);
					dos_out_text.append(s);
				}
			}
			catch(IOException e1){}
		}
	}
}