Chạy File trong File

import java.io.BufferedReader;
import java.io.BufferedWriter;
import java.io.File;
import java.io.FileWriter;
import java.io.IOException;
import java.io.InputStreamReader;
import javax.tools.JavaCompiler;
import javax.tools.ToolProvider;

public class CompileOneFile {

    public static void main(String args[]) throws IOException {
        // Tao File Test.java
        GhiFileBanDau("C:/Test.java");
        // Bien dich file Test.java thanh Test.class
        JavaCompiler compiler = ToolProvider.getSystemJavaCompiler();
        if (compiler == null) {
            System.out.println("Làm ơn chỉ định java tool của JDK");
            return;
        }
        int results = compiler.run(null, null, null, "C:/Test.java");
        if (results == 0) {
            System.out.println("Successfully");
            //  Tao file chay.bat
            GhiFile("C:/chay.bat");
            // Chay file chay.bat
            runCmd();
        } else {
            System.out.println("Compile fail…");
        }
    }

    public static void GhiFileBanDau(String strInput) {
        try {
            File f = new File(strInput);
            FileWriter fw = new FileWriter(f);
            BufferedWriter bw = new BufferedWriter(fw);
            // Noi dung file
            bw.write("import javax.swing.JOptionPane;public class Test {public static void main(String[] args) {JOptionPane.showMessageDialog(null, \"Thieu Mao\");}}");
            bw.close();
            fw.close();
        } catch (Exception ex) {
            System.out.println("Loi roi");
        }
    }

    public static void GhiFile(String strInput) {
        try {
            File f = new File(strInput);
            FileWriter fw = new FileWriter(f);
            BufferedWriter bw = new BufferedWriter(fw);
            // Noi dung file
            bw.write("C: \n cd/ \n java Test");
            bw.close();
            fw.close();
        } catch (Exception ex) {
            System.out.println("Loi roi");
        }
    }

    public static void runCmd() {
        System.out.println("Begin...");
        try {
            Runtime rt = Runtime.getRuntime();
            String[] cmd = {"C:\\chay.bat"};
            System.out.println(cmd.length);
            Process p = rt.exec(cmd);
            BufferedReader in = new BufferedReader(new InputStreamReader(p
                    .getInputStream()));
            String line = null;
            while ((line = in.readLine()) != null) {
                System.out.println(line);
            }
        } catch (IOException e) {
            e.printStackTrace();
        }
        System.out.println("Final");
    }
}