https://leetcode.com/problems/minimum-time-difference/

minimum-time-difference.java

class Solution {
    public int findMinDifference(List<String> timePoints) {
        List<Integer> times = new ArrayList<>();
        for (String tp : timePoints) {
            times.add(readValue(tp));
        }
        Collections.sort(times);
        
        int min = Integer.MAX_VALUE;
        int len = times.size();
        for (int i = 1; i < len; i++) {
            min = Math.min(min, times.get(i) - times.get(i - 1));
        }
        
        min = Math.min(min, 24 * 60 + times.get(0) - times.get(len - 1));
        return min;
    }
    
    private int readValue(String tp) {
        int hr = 10 * (tp.charAt(0) - '0')  + (tp.charAt(1) - '0');
        int mint = 10 * (tp.charAt(3) - '0')  + (tp.charAt(4) - '0');
        return hr * 60 + mint;
    }
    
    
}