将整数分钟转换为字符串“hh：mm” [英] Convert integer minutes into String "hh:mm"

问题描述

我需要将 minutes （定义为Integer）转换为以下字符串格式hh：mm，假设 startTime 是00:00。下面给出的代码是我目前所拥有的，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？

I need to convert minutes (defined as Integer) into the following String format "hh:mm" assuming that the startTime is "00:00". The below-given code is what I have so far, but it does not work properly. Also it does not take into account that the newTime should be shifted in accordance to startTime. Is there any other solution?

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);

推荐答案

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;

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