解答私信@星火人

package App;
import java.util.*;
class Time
{
	private int hour;
	private int minute;
	private int second;
	private int transHour;
	Scanner reader=new Scanner(System.in);
	private void SetTime()
	{
		System.out.print("Please enter hour, minute, second: ");
		hour=reader.nextInt();
		minute=reader.nextInt();
		second=reader.nextInt();
	}
	public Time()
	{
		hour=0;
		minute=0;
		second=0;
	}
	public Time(int hourValue)
	{
		hour=hourValue;
		minute=0;
		second=0;
	}
	public Time(int hourValue, int minuteValue, int secondValue)
	{
		hour=hourValue;
		minute=minuteValue;
		second=secondValue;
	}
	public void ToString12()
	{
		switch(hour)
		{
			case 13: transHour=1; break;
			case 14: transHour=2; break;
			case 15: transHour=3; break;
			case 16: transHour=4; break;
			case 17: transHour=5; break;
			case 18: transHour=6; break;
			case 19: transHour=7; break;
			case 20: transHour=8; break;
			case 21: transHour=9; break;
			case 22: transHour=10; break;
			case 23: transHour=11; break;
			default: break;
		}
		System.out.print("12小时制时间:"+transHour+":"+minute+":"+second);
		if(hour>=0&&hour<=12)
			System.out.println("AM");
		else
			System.out.println("PM");
	}
	public void ToString24()
	{
		System.out.println("24小时制时间:"+hour+":"+minute+":"+second);
	}
}
public class App1
{
	public static void main(String[] args)
	{
		Time t1=new Time();
		System.out.println("time1:");
		t1.ToString24();
		t1.ToString12();
		Time t2=new Time(22);
		System.out.println("time2:");
		t2.ToString24();
		t2.ToString12();
		Time t3=new Time(22, 36, 30);
		System.out.println("time3:");
		t3.ToString24();
		t3.ToString12();
	}
}