Java calendar time, minute is wrong

Question

Anyone know why the MINUTE method in java.util.Caldendar returns an incorrect minute?

import java.util.Calendar;

public class Clock
{
    // Instance fields
    private Calendar time;

    /**
     * Constructor. Starts the clock at the current operating system time
     */
    public Clock()
    {
       System.out.println(this.time.HOUR_OF_DAY+":"+this.time.MINUTE);
    }
}

Answer 1

Calendar.MINUTE isn't the actual minute but rather a constant index value to pass into "get()" in order to get the value. For example:

System.out.println(this.time.get(Calendar.HOUR_OF_DAY) + ":" + this.time.get(Calendar.MINUTE));

Answer 2

HOUR_OF_DAY and MINUTE are public static fields that are meant to be passed into Calendar#get(int). Typically, you'd want to use Calendar.getInstance().get(Calendar.MINUTE) for the current minute. In your example though, you want time.get(Calendar.MINUTE).

Answer 3

import java.util.Calendar;

public class Clock { // Instance fields private Calendar time;

/**
 * Constructor. Starts the clock at the current operating system time
 */
public Clock()
{
   time = Calendar.getInstance(); 
   System.out.println(this.time.get(Calendar.HOUR_OF_DAY) +
                       ":" + this.time.get(Calendar.MINUTE));
}

}

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