Compiling but not executing

Question

import java.util.Random;
* A guessing game of high/low
class HighLow {
   * a randomly generated number to be guessed
  private int number;
   * indicates if number has been guessed or not
  private boolean guessed;
   * Initializes the game, setting number to be something
   * between 0 and upperBound
   * @param upperBound the maximum that the number can be
  public HighLow( int upperBound ) {
    if( upperBound < 0 ) {
      upperBound *= -1;
    // a random number generator
    Random r = new Random();
    // set the number to a random number
    // between 0 and upperBound
    number = r.nextInt( upperBound );
    guessed = false;
   * Initializes the game, setting number to be something
   * between lowerBound and upperBound
   * @param upperBound the maximum that the number can be
   * @param lowerBound the minimum that the number can be
  public HighLow( int lowerBound, int upperBound ) {
    // a random number generator
    Random r = new Random();
    // set the number to a random number
    // between 0 and upperBound
    number = r.nextInt( upperBound - lowerBound );
    number = number + lowerBound;
    guessed = false;
  // accepts an integer. prints out if that
  // argument is higher than, lower than, or
  // equal to number
  public void check( int guess ) {
    if( !guessed ) {
      if( guess > number ) {
        System.out.println( "Too high" );
      } else if( guess < number ) {
        System.out.println( "Too low" );
      } else {
        System.out.println( "Good job!" );
        guessed = true;
    } else {
      System.out.println( "You already guessed it! It's " + number );
}error: Exeption in thread "main" Java.lang.nosuchMethodError : main

Answer 1

1) You do not have to make a new message for each error, it still applies on the same thread.
2) where is your main part of the application ? Are you trying to run an applet ?