Tech Erudition

/**
 * This program is written to save the input parameter of 
 * a program for future use.
 * It uses the library provided by http://www.braju.com/ for printf()
 */

import java.io.PrintStream;
import java.io.FileOutputStream;
import java.io.OutputStream;

/* 
 * hb16.zip  from http://www.braju.com/
 * contains set of classes to provide printf() function
 */
import com.braju.format.Format;
import com.braju.format.Parameters;

public class HelloWorld {
  static String quote = "Hello World!";

  static String code =
    "import java.io.PrintStream;" +
    "import java.io.FileOutputStream;" +
    "import java.io.OutputStream;" +
    "import com.braju.format.Format;" +
    "import com.braju.format.Parameters;" +
    "public class HelloWorld{" +
    "static String quote=*%s*;" +
    "static String code=*%s*;" +
    "public static void main(String args[]) throws Exception {" +
    "if(args.length==1)quote = args[0];System.out.println(quote);" +
    "OutputStream os = new FileOutputStream(*HelloWorld.java*);" +
    "PrintStream ps = new PrintStream(os);" +
    "ps.println("+
    "Format.sprintf(code.replace('%c', (char)34), "+
    "new Parameters(quote).add(code).add((char)42)));" +
    "ps.close();" +
    "Runtime.getRuntime().exec(*javac -classpath hb16.zip HelloWorld.java*);" +
    "}}";

    public static void main(String args[]) throws Exception {
        if (args.length == 1) quote = args[0];
        System.out.println(quote);
        OutputStream os = new FileOutputStream("HelloWorld.java");
        PrintStream ps = new PrintStream(os);
        ps.println(Format.sprintf(code.replace('*', (char) 34), 
          new Parameters(quote).add(code).add((char) 42)));
        ps.close();
        Runtime.getRuntime().exec("javac -classpath hb16.zip HelloWorld.java");
    }
}

Compile: javac -classpath hb16.zip HelloWorld.java
Execute: 
(For Linux)   java -cp .:hb16.zip HelloWorld
(For Windows) java -cp .;hb16.zip HelloWorld
Sample:
$ java -cp .:hb16.zip HelloWorld
Hello World!
$ java -cp .:hb16.zip HelloWorld Parameter
Parameter
$ java -cp .:hb16.zip HelloWorld
Parameter
/* Parameter which was the previous input to the program has been saved. */