import java.text.SimpleDateFormat;
import java.util.Date;


public class TimeGain implements Runnable {
    
    Date nDate = null ;
    
    public void run() {
        int i = 0;
        while (i < 24) {
            i++;
            System.out.println(i);// 此处处理逻辑
//            try {
//                //获取时间
//                SimpleDateFormat sdf = new SimpleDateFormat("HH:mm");
//                Date date = new Date();
//                date.setHours(0);
//                date.setMinutes(0);
//                Hashtable<String,Date> temp = new Hashtable<String,Date>();
//                
//                
//                System.out.println(sdf.format(date));
//                if(date.getHours()<12){
//                    System.out.println(sdf.format(date)+"am");
//                }else{
//                    System.out.println(sdf.format(date)+"pm");
//                }
//                Thread.sleep(60000);
//            } catch (Exception e) {
//                e.printStackTrace();
//            }
            
            SimpleDateFormat sdf = new SimpleDateFormat("HH:mm");
            try {
                Date initDate = getInitDate();
                initDate.setMinutes(initDate.getMinutes()+1);
                
                if(initDate.getHours()<12){
                    
                    System.out.println(sdf.format(initDate)+"am");
                }else{
                    System.out.println(sdf.format(initDate)+"pm");
                
                }
                Thread.sleep(60000);
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
        }
    }
    
    public Date getInitDate(){
        if(nDate == null){            
            nDate = new Date();
            nDate.setHours(0);
            nDate.setMinutes(0);
            
        }
        return nDate;
    }

    public static void main(String[] args) {
        TimeGain tt = new TimeGain();
        Thread t = new Thread(tt);
        t.start();
    }
}

public class TimeGain implements Runnable {
        
    public void run() {
        int hh = 0;
        int mm = 0;
        while (hh < 24) {
            try {
                System.out.printf("\"%02d:%02d%s\",", hh, mm, (hh < 12 ? "am" : "pm"));
                mm++;
                if (mm == 60) {
                    mm = 0;
                    hh++;
                }
                if (hh == 24) {break;} 
                Thread.sleep(60000);
            } catch (InterruptedException e) {
                e.printStackTrace();
            }
        }
    }
    
    public static void main(String[] args) {
        TimeGain tt = new TimeGain();
        Thread t = new Thread(tt);
        t.start();
    }
}

------解决方案--------------------

我的建议用定时器做也可以
Java code


import java.util.Date;
import java.util.Timer;
import java.util.TimerTask;

public class Test {

    static int h = 0;
    static int m = 0;

    public static void main(String[] args) throws Exception {
        TimerTask task = new TimerTask() {
            @Override
            public void run() {
                // 调用业务方法
                System.out.printf("\"%02d:%02d%s\",", h, m, (h < 12 ? "am"
                        : "pm"));//复制阿宝的，嘿嘿，学习了！
                m++;
                if (m == 60) {
                    m = 0;
                    h++;
                }
                if (h == 12)
                    h = 0;
            }
        };
        // 创建一个定时器
        Timer timer = new Timer();
        // 设值 3 秒钟后开始执行第一次，以后每隔 1 秒中执行一次
        // timer.schedule(task, 3 * 1000, 1 * 1000);
        // 设值现在开始执行第一次，以后每隔 60 秒中执行一次
        timer.schedule(task, new Date(), 60 * 1000);
    }
}