secondscalculator.java

输入一个时间

/**
 * @author 萧丽娴
 * @number 200532580156
 */
import  java.io.*;
import  java.util.*;

public class SecondsCalculator {
	
	private static BufferedReader stdIn =
		new BufferedReader(new InputStreamReader(System.in));
	
	private static PrintWriter stdOut = 
		new PrintWriter(System.err,true);
	
	private static PrintWriter stdErr =
		new PrintWriter(System.err,true);
	
public static void main(String[] args) throws IOException{
	
	String time ;

	StringTokenizer tokenizer ; 
	
	int hours ; 
	int minutes ;
	int seconds ;
	
	int size ;
	
	int secondsTotal ;
	
	do{
		try{
			stdErr.print("time [hours:minutes:seconds]>" );
			stdErr.flush();
			
			time = stdIn.readLine();
			 tokenizer = new StringTokenizer(time,":"); 
			 size = tokenizer.countTokens();
			 
			if (size != 3){
				stdOut.println("Invalid input");
			}
			if (size == 3){
				
				hours=Integer.parseInt(tokenizer.nextToken());
				minutes=Integer.parseInt(tokenizer.nextToken());
                seconds=Integer.parseInt(tokenizer.nextToken());
				
                if ((hours >= 24 || hours < 0) || (minutes >= 60 || minutes < 0 ) || (seconds >= 60 || seconds < 0 )){
					stdOut.println("Invalid input");
				}
				else {
					secondsTotal = hours * 3600 + minutes * 60 + seconds;
					stdOut.println("The number of seconds is: "+ secondsTotal);
                   
					System.exit(0) ;
				}
			}
		}catch(IOException e)
		{
			stdOut.println(e.toString());

			
				}catch (NumberFormatException nfe){
					stdErr.println(nfe.toString());
				}
			}while (true);
		
	}
}