Reference no: EM1344454

Q1) How do you write a code for number 3 which is bottom of the code in a Tokenzier class.

if(Buf[cur]>=('0') && Buf[cur]<=('9')){
while(cur<Buf.length && Buf[cur]>=('0') && Buf[cur]<=('9')){ do something.
}
class Tokenizer {
private char [] Buf;
private int cur;
Tokenizer(String infixExpression) {
Buf = infixExpression.toCharArray();
cur = 0;
}
Token nextToken() {

1. Skip blanks.

2. if (cur>=Buf.length) return null;

3. If the next character is a digit, keep reading until a non-digit is read.
Convert the string of digits into an integer.
String Digits = new String(Buf, start, len);
int num = Integer.valueOf(Digits).intValue();
Create and return an operand.

4. Otherwise, use the next character to create and return an operator.
}
}