Java User input YY-MM-DD format

This is for an assignment in data structures and I can't seem to find the exact answer I need.

I am attempting to take user input for a date, preferably YY-MM-DD format, then check for validity.. if not valid, cycling until valid. This really seems very tedious and I am receiving two illegal start of expression errors.

I did search, google and stackoverflow, but only find things addressing Date

public String hireDate(){
    Scaer input = new Scaer(System.in);
    boolean answer = false;
    while(answer == false){
        String temp = input.nextLine();
        if((temp.charAt(0) >= 0 && temp.charAt(0) <= 9) && (temp.charAt(1)
                >= 0 && temp.charAt(1) <= 9) && (temp.charAt(2) == -) 
                && (temp.charAt(3) >= 0 && temp.charAt(3) <= 9) && (temp.charAt(4)
                >= 0 && temp.charAt(4) <= 9) && (temp.charAt(5) == -)
                && (temp.charAt(6) >= 0 && temp.charAt(6) <= 9)){
            answer = true;
        }
        else {
            answer = false;
        }    
    }retu temp;

}