!595

import java.util.*;

import java.io.*;

import java.util.regex.*;

public class main {

  static String[] standardClasses = {

    "java.util.*",

    "java.util.zip.*",

    "java.util.List",

    "java.util.regex.*",

    "java.util.concurrent.*",

    "java.util.concurrent.atomic.*",

    "javax.swing.*",

    "javax.swing.event.*",

    "javax.swing.text.*",

    "javax.swing.table.*",

    "java.io.*",

    "java.net.*",

    "java.lang.reflect.*",

    "java.lang.ref.*",

    "java.lang.management.*",

    "java.security.*",

    "java.security.spec.*",

    "java.awt.*",

    "java.awt.event.*",

    "java.awt.image.*",

    "javax.imageio.*",

    "java.math.*"

  };

  public static void main(String[] args) throws IOException {

    String s = loadMainJava();

    List<String> imports = findImports(s);

    for (String c : standardClasses)

      if (!(imports.contains(c)))

        s = "import " + c + ";\n" + s;

    saveMainJava(s);

  }

  static List<String> findImports(String src) {

    List<String> imports = new ArrayList<String>();

    for (String line : toLines(src)) {

      Matcher matcher = Pattern.compile("^\\s*import\\s+(.*?)\\s*;").matcher(line);

      if (matcher.find())

        imports.add(matcher.group(1));

    }

    return imports;

  }

}