Military Time Converter

[Winkster]

I have written a class to convert military time to standard time. What I need to do is modify this code so a user can input the military time. I realize I can take out some extraneous code. Thanks.

import java.util.Date;
import java.text.SimpleDateFormat;
import java.util.Calendar;
// Time abstract data type (ADT) definition

public class Time
{
private int hour; // 0 - 23 (attributes)
private int minute; // 0 - 59 (attributes)
//private int second; // 0 - 59 (attributes)

private Date dt;
private long offset;

int number;

// Time constructor initializes each data member to zero.
// Ensures all Time objects start in a consistent state.
public Time( )
{
setOffset();
setTime(0,0); //removed seconds
}

// set a new Time value hour, minute
public void
setTime(int h, int m)throws IllegalArgumentException
{
if(h > 23 || h <0 || m > 59 ||m < 0 )
throw(new IllegalArgumentException());
hour = h;
minute = m;

dt = new Date(((h*3600)+(m*60))*1000-offset);
}

void setOffset()
{
Calendar c = Calendar.getInstance();
offset =c.get(c.ZONE_OFFSET);
}

// Print time in standard format
public void printStandard( )
{

System.out.println(new SimpleDateFormat("h:mm a").format(dt));
}

public void printMilitary()
{
System.out.println(new SimpleDateFormat("HHmm").format(dt));
}

// Driver to test simple class Time
public static void main( String args[ ] )
{



Time t = new Time( ); // instantiate object t of class time
System.out.print("\nThe initial standard time is ");
t.printStandard( );
System.out.print("\nThe initial military time is ");
t.printMilitary();

try
{
System.out.println("Enter time in 24 hour notation:");
t=SavitchIn.readLine();//THIS IS WHAT I NEED TO FIX???
t.setTime(13,47);
}
catch(IllegalArgumentException e){System.out.println(e);}

System.out.print("That is the same as ");
t.printStandard( );
System.out.print("That is the same as ");
t.printMilitary( );

try{t.setTime(99, 99);} // attempt invalid settings
catch(IllegalArgumentException e){System.out.println(e);}
t.printStandard( );


}
}

[sjalle]

Put this line of code the main method:

BufferedReader input = new BufferedReader(new InputStreamReader(System.in));

Then implement this method for getting user input:

/**
* Gets user input and returns hours and minutes as an int[2]
* @param input the console
* @param type type of timestring requested ("military" or "standard");
* @return
*/
public static int [] getTimeInput(BufferedReader input, String type) {
String s1=null, s2=null;
try {
String ins=input.readLine().trim();
if (type.equals("military")) {
s1=ins.substring(0,2);
s2=ins.substring(2,4);
} else if (type.equals("standard")){
int ix=ins.indexOf(":");
s1=ins.substring(0,ix);
s2=ins.substring(ix+1);
}
return new int [] {Integer.parseInt(s1), Integer.parseInt(s2)};
} catch (NumberFormatException nfe) {
System.out.println("That was not an integer");
return null;
} catch (IOException ioe) {
System.out.println("You can't read this cause your computer just died");
return null; // ehem....
}
}

then use this in your main method:

System.out.println("Enter time in 24 hour notation:");
int [] sT=getTimeInput(input,"standard");
t.setTime(sT[0],sT[1]);
t.printStandard( );
t.printMilitary( );
System.out.println("Enter time in military notation:");
int [] mT=getTimeInput(input,"military");
t.setTime(mT[0],mT[1]);
t.printStandard( );
t.printMilitary( );

[Winkster]

Thanks. I am incorporating this now and testing to see if it works the way I want.