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/* package whatever; // don't place package name! */
 
import java.util.*;
import java.lang.*;
import java.io.*;
 
/* Name of the class has to be "Main" only if the class is public. */
class Ideone
{
	public static void main (String[] args) throws java.lang.Exception
	{
	double boatYear = inputBoatYear("Please enter the boat year, must >= 1800 and <= 2014:", 1800, 2014);
	}
 
public static int inputBoatYear(String messagePassed,int lowerLimitPassed, int upperLimitPassed)
{
System.out.println(messagePassed);
int userInput = keyboard.nextInt();
 
do{
System.out.println("Please Reenter the year: ");
userInput = keyboard.nextInt();
}
while(userInput < lowerLimitPassed || userInput > upperLimitPassed);
 
keyboard.nextLine();
return userInput;
}
 
 
 
}

Main.java:18: error: cannot find symbol
int userInput = keyboard.nextInt();
                ^
  symbol:   variable keyboard
  location: class Ideone
Main.java:22: error: cannot find symbol
userInput = keyboard.nextInt();
            ^
  symbol:   variable keyboard
  location: class Ideone
Main.java:26: error: cannot find symbol
keyboard.nextLine();
^
  symbol:   variable keyboard
  location: class Ideone
3 errors

Standard output is empty