Time2

// Fig. 8.5: Time2.java
// Time 2 class declaration with overloaded constructors.

public class Time2
{
    private int hour; // 0 - 23
    private int minute; // 0 - 59
    private int second; // 0 -59

    //Time2 no-argument constructor:
    //initializes each instance variable to zero
    public Time2()
    {
        this( 0, 0, 0); // invoke Time2 constructor with three arguments
    } // end Time2 no-argument constructor

    public Time2( int h )
    {
        this( h, 0, 0 ); // invoke Time2 constructor with three arguments
    } // end Time2 no-argument constructor

    // Time2 constructor: hour and minute supplied, second defaulted to 0
    public Time2 ( int h, int m )
    {
        this ( h, m, 0 ); // invoke Time2 constructor with three arguments
    } // end Time2 two-argument constructor

    // Time2 constructor: hour, minute and second supplied
    public Time2( int h, int m, int s )
    {
        setTime( h, m, s ); // invoke setTime to validate time
    } // end Time2 three-argument constructor

    //Time2 constructor: another Time 2 object supplied
    public Time2( Time2 time )
    {
        // invoke Time2 three-argument constructor
        this( time.getHour(), time.getMinute(), time.getSecond() );
    } //end Time2 contructor with a Time2 object argument

    // Set Methods
    // set a new time valur using universal time;
    // validate the data
    public void setTime( int h, int m, int s )
    {
        setHour( h ); // set the hour
        setMinute( m ); // set the minute
        setSecond( s ); // set the second
    } // end method setTime

    //validate and set hour
    public void setHour( int h)
    {
        if ( h >= 0 && h < 24 )
            hour = h;
        else
            throw new IllegalArgumentException( "hour must be 0-23" );
    } // end method SetHour

    // validate and set minute
    public void setMinute( int m )
    {
        if ( m >= 0 && m < 60 )
            minute = m;
        else
            throw new IllegalArgumentException( "minute must be 0-59" );
    } // end method setMinute

    //validate and set second
    public void setSecond( int s )
    {
        if ( s >= 0 && s < 60 )
            second = ( ( s >= 0 && s < 60) ? s : 0 );
        else
            throw new IllegalArgumentException( "second must be 0-59" );
    } // end method setSecond

    // Get Methods
    // get hour value
    public int getHour()
    {
        return hour;
    } // end method getHour

    // get minute value
    public int getMinute()
    {
        return minute;
    } // end method getMinute

    // get second valur
    public int getSecond()
    {
        return second;
    } // end method getSecond

    // convert to String in universal-time format ( HH:MM:SS )
    public String toUniversalString()
    {
        return String.format(
            "%02d:%02d:%02d", getHour(), getMinute(), getSecond() );
    } // end method toUniversalString

    // convert to String in standard-time format ( HH:MM:SS AM or PM )
    public String toString()
    {
        return String.format( "%d:%02d:%02d %s",
            ( (getHour() == 0 || getHour() == 12) ? 12 : getHour() % 12 ),
                getMinute(), getSecond(), ( getHour() < 12 ? "AM" : "PM" ) );
    } // end method toString
} // end class Time2