Write a java prgram that inputs a word representing a binary number (0s and 1s).

Question

Write a java prgram that inputs a word representing a binary number (0s and 1s). First, your program should check that is is indeed a binary number, that is, that it contains only 0s and 1s. If that is not the case, your program should output that the number is not a valid binary number. If that word contains at least 3 consecutive 1s, your program should output that that word is "accepted," otherwise that it is "rejected." If the word does not represent a valid binary number, the program should keep prompting the user for a new word until a word representing a valid binary number is input by the user.

Explanation / Answer

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import java.util.*;
public class main
{public static void main(String[] args)
{String number;
int i,count;
char digit;
boolean good=false,valid=false;
Scanner in=new Scanner(System.in);
while(!good)
   {System.out.print("Enter a binary number: ");
    number=in.next();
    for(i=0;i<number.length();i++)
         {digit=number.charAt(i);
           if(digit<'0'||digit>'1')
                {i=number.length()+5;
                System.out.println(number +" is not a valid binary number");
                }
            }
    if(i==number.length())
         {good=true;
        count=0;
        for(i=0;i<number.length()-2;i++)
            {if(number.charAt(i)=='1')
                  if(number.charAt(i+1)==number.charAt(i+2)&&
                        number.charAt(i+1)=='1')
                            {valid=true;
                            i=number.length();
                            }
                }
        if(valid)
             System.out.println(number+" is accepted");
        else
            System.out.println(number+" is rejected");
      }
   
}
}
}

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