Question

我需要将minutes（定义为Integer）转换为以下字符串格式“hh：mm”，假设startTime为“00:00”。下面给出的代码是我到目前为止，但它无法正常工作。此外，它没有考虑newTime应根据startTime进行转移。还有其他解决方案吗？

String startTime = "00:00";
int minutes = 120;
double time = minutes/60;
String timeS = Double.toString(time);
String[] hourMin = timeS.split(".");
String h = hourMin[0];
String m = hourMin[1];
String newTime = "";    
newTime.concat(h+":"+m);

Answer 1

你走了：

/*Output: 02:05 */
public String fromMinutesToHHmm(int minutes) {
    long hours = TimeUnit.MINUTES.toHours(Long.valueOf(minutes));
    long remainMinutes = min - TimeUnit.HOURS.toMinutes(hours);
    return String.format("%02d:%02d", hours, remainMinutes);
}

Kotlin 版本

class DateUtils {

    companion object {

        fun fromMinutesToHHmm(minutes: Int): String {
            val hours = TimeUnit.MINUTES.toHours(minutes.toLong())
            val remainMinutes = minutes - TimeUnit.HOURS.toMinutes(hours)
            return String.format("%02d:%02d", hours, remainMinutes)
        }

    }

}

Answer 2

String startTime = "00:00";
int minutes = 120;
int h = minutes / 60 + Integer.parseInt(startTime.substring(0,1));
int m = minutes % 60 + Integer.parseInt(startTime.substring(3,4));
String newtime = h+":"+m;

Answer 3

我最近写了这篇文章，将秒数转换为小时，分钟和秒;根据需要调整它（用冒号替换“s”，“m”，“h”，省略秒等）。

编辑：在匆忙改进之后修复我的代码中的愚蠢错误。

private static String getFormattedTime(int secs) {
    // int secs = (int) Math.round((double) milliseconds / 1000); // for millisecs arg instead of secs
    if (secs < 60)
        return secs + "s";
    else {
        int mins = (int) secs / 60;
        int remainderSecs = secs - (mins * 60);
        if (mins < 60) {
            return (mins < 10 ? "0" : "") + mins + "m "
                    + (remainderSecs < 10 ? "0" : "") + remainderSecs + "s";
        }
        else {
            int hours = (int) mins / 60;
            int remainderMins = mins - (hours * 60);
            return (hours < 10 ? "0" : "") + hours + "h "
                    + (remainderMins < 10 ? "0" : "") + remainderMins + "m "
                    + (remainderSecs < 10 ? "0" : "") + remainderSecs + "s";
        }
    }
}

Answer 4

    private static string calculateReward(string answer, string reward)
    {
        reward = answer == "1" ? "a cat" : answer == "2" ? "power to rival Chuck Norris" : answer == "3" ? "a burger" : "nothing";
        return reward;
    }

Answer 5

String startTime = "00:00";
int minutes = 120;

//--- counting
int hour = minutes/60;
minutes=minutes-hours*60;
String m = Integer.toString(minutes);
String h = Integer.toString(hours);
newTime=h+":"+m;

Answer 6

int ALLTIME_IN_MINUTES = 1444
int hour = ALLTIME_IN_MINUTES /60;
            int min = ALLTIME_IN_MINUTES %60;


            String dateStr = hour+":"+min;
            SimpleDateFormat curFormater = new SimpleDateFormat("H:m"); 
            Date dateObj = curFormater.parse(dateStr); 
            SimpleDateFormat postFormater = new SimpleDateFormat("HH:mm"); 

            String newDateStr = postFormater.format(dateObj);

<强>结果： 24:04

Answer 7

apines的答案很好但是如果你想在Android中删除警告，请添加'Locale'：

int hours = 3;
int minutes = 6;
private static final String TIME_SEPARATOR = ":";
String.format(Locale.getDefault(), "%02d"+TIME_SEPARATOR+"%02d", hours, minutes);

Answer 8

int minutes = 129;
double hoursAndMinutes = (minutes / 60)
        + (double) minutes % 60 / 100;
String hoursAndMinutesStr = new DecimalFormat("0.00").format(hoursAndMinutes).replace('.', ':');
System.out.println(hoursAndMinutesStr);

将整数分钟转换为字符串“hh：mm”

8 个答案: