Strings Question

[allabout42]

I'm trying to teach myself Java in preparation for a CS class next semester. I've read a few chapters of an introductory Java book. I thought I write a program for fun, where it would take a bunch of times (5 to be exact) and average them. The format would be in min:sec (eg 1:41). My question is that, is there a procedure or method in Java that can check if the ":" is a member of the input? Also are there similar "car" or "cdr" procedures in Java too?

Here's my code:

import java.io.*;
 
public class cube {
    String time;
 
    public static void main (String[] args){
 
        cube [] times = new cube[5];
        int x = 0;
 
        while (x < 5){
            System.out.print(x);
            System.out.print(" Enter your time: ");
 
            BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
 
            times[x] = new cube();
 
            try {
                times[x].time = br.readLine();
                }
            catch (IOException ioe) {
                System.out.println("IO error trying to read input!");
                System.exit(1);
            }
            x = x + 1;
        }
 
    }
 
}
 

Thanks a bunch.

[blazedaces]

I'm trying to teach myself Java in preparation for a CS class next semester. I've read a few chapters of an introductory Java book. I thought I write a program for fun, where it would take a bunch of times (5 to be exact) and average them. The format would be in min:sec (eg 1:41). My question is that, is there a procedure or method in Java that can check if the ":" is a member of the input? Also are there similar "car" or "cdr" procedures in Java too?

Here's my code:

import java.io.*;
 
public class cube {
    String time;
 
    public static void main (String[] args){
 
        cube [] times = new cube[5];
        int x = 0;
 
        while (x < 5){
            System.out.print(x);
            System.out.print(" Enter your time: ");
 
            BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
 
            times[x] = new cube();
 
            try {
                times[x].time = br.readLine();
                }
            catch (IOException ioe) {
                System.out.println("IO error trying to read input!");
                System.exit(1);
            }
            x = x + 1;
        }
 
    }
 
}
 

Thanks a bunch.

Check out this class: http://java.sun.com/j2se/1.3/docs/api/java/sql/Time.html

The time.valueOf(String) does exactly what you want, make a Time class object from a String of format hh:mm:ss.

And I'm sorry I don't know what car and cdr functions represent...

Good luck, hope I helped,
-blazed

[JosAH]

Check out this class: http://java.sun.com/j2se/1.3/docs/api/java/sql/Time.html

The time.valueOf(String) does exactly what you want, make a Time class object from a String of format hh:mm:ss.

And I'm sorry I don't know what car and cdr functions represent...

Almost everything in that Time class is deprecated; better use a DateFormat
class for this (or a subclass thereof). btw, 'car' and 'cdr' are Lisp functions:
content of address register and content of data register which cryptically mean
the head (first element) and tail (everything but the first element) of, say, a list.

kind regards,

Jos

[blazedaces]

Almost everything in that Time class is deprecated; better use a DateFormat
class for this (or a subclass thereof). btw, 'car' and 'cdr' are Lisp functions:
content of address register and content of data register which cryptically mean
the head (first element) and tail (everything but the first element) of, say, a list.

kind regards,

Jos

Good to know, thank you very much.

-blazed