compilejava.java

java应用举例2

import java.io.*;
import java.awt.*;
import java.awt.event.*;

public class CompileJava{
	public static void main(String args[]){
		Compiler compile = new Compiler();
		compile.pack();
		//窗口增加适配器
		compile.addWindowListener(new WindowAdapter()  {
			public void windowClosing(WindowEvent e) {
				System.exit(0);}
		});
		//设定程序界面尺寸及可见
		compile.setBounds(100,120,700,360);
		compile.setVisible(true);
	}
}

class  Compiler extends Frame implements ActionListener,Runnable {
	//负责编译的线程
	Thread compiler = null;
	//负责运行程序的线程
	Thread runProm = null,runApplet = null;
	boolean bn = true;
	CardLayout mycard;
	Panel p = new Panel();
	File fileSaved = null;
	//程序输入区
	TextArea inputText = new TextArea();
	//编译出错显示区
	TextArea compilerText = new TextArea();
	//程序运行时，负责显示在dos窗口的输出信息
	TextArea dosText=new TextArea();
	Button btnInput,btnCompiler,
		   btnCom,btnRun,btnSee;
	TextField fileText = new TextField("输入文件名字.java");
	TextField nameText = new  TextField("输入主类的名字");

	Compiler() {
		//程序界面初始化
		super("Java编程小软件");
		mycard = new CardLayout();
		btnInput = new Button("程序输入区(白色)");
		btnCompiler = new Button("编译结果区(粉色)");
		btnCom = new Button("编译程序");
		btnRun = new Button("运行应用程序");
		btnSee = new  Button("查看应用程序运行时在dos窗口输出的信息");

		p.setLayout(mycard);
		p.add("input",inputText);
		p.add("compiler",compilerText);
		p.add("dos",dosText);
		add(p,"Center");
		add( btnSee,"South");
		compilerText.setBackground(Color.pink);

		Panel p1 = new Panel();p1.setLayout(new GridLayout(4,2));
		p1.add(new Label("按扭输入源程序："));
		p1.add(btnInput);
		p1.add(new Label("按扭看编译结果："));
		p1.add(btnCompiler);
		p1.add(fileText);
		p1.add(btnCom);
		p1.add(nameText);
		p1.add(btnRun);
		add(p1,"North");
		btnInput.addActionListener(this);
		btnCompiler.addActionListener(this);
		btnCom.addActionListener(this);
		btnRun.addActionListener(this);
		btnSee.addActionListener(this);
	}
	//定义按钮点击事件
	public void actionPerformed(ActionEvent e) {
		if(e.getSource() == btnInput) {
			mycard.show(p,"input");
		}
		else if(e.getSource() == btnCompiler) {
			mycard.show(p,"compiler");
		}
		else if(e.getSource() == btnSee) {
			mycard.show(p,"dos");
		}
		else if(e.getSource() == btnCom) {
			compiler = new Thread(this);
			compiler.start();
			mycard.show(p,"compiler");
		}
		else if(e.getSource() == btnRun) {
			runProm = new Thread(this);
			runProm.start();
			mycard.show(p,"dos");
		}
	}

	public void run() {
		if(Thread.currentThread() == compiler) {
			compilerText.setText(null);
			String temp = inputText.getText().trim();
			byte buffer[] = temp.getBytes();
			int b = buffer.length;
			String flie_name = fileText.getText().trim();
			try{
				//建立文件输入流
				fileSaved=new File(flie_name);
				FileOutputStream whritefile=new FileOutputStream(fileSaved);
				whritefile.write(buffer,0,b);
				whritefile.close();
			} catch(IOException e5){
				System.out.println("Error ");
			}

			try{
				//执行外部命令
				Runtime ce=Runtime.getRuntime();
				InputStream in=ce.exec("javac "+flie_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,0,100);
					compilerText.append(s);
					if(s!=null)
						bn=false;
				}
				if(bn){
					compilerText.append("编译正确");
				}
			}
			catch(IOException e1){ }
		}
		else if(Thread.currentThread()==runProm) {
			dosText.setText(null);
			try{
				//执行外部命令
				Runtime ce=Runtime.getRuntime();
				String path=nameText.getText().trim();
				InputStream in=ce.exec("java  "+path).getInputStream();
				BufferedInputStream bin=new BufferedInputStream(in);
				byte zu[]=new byte[150];
				int fine;
				String s=null;
				while((fine=bin.read(zu,0,150))!=-1);{
					s=new String(zu,0,150);
					dosText.append(s);
				}
			}
			catch(IOException e1){ }
		}
	}
}