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(St ring) 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(St ring) 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