165. Compare Version Numbers

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这道题通过“.”划分成数组，在一个一个数组比较

public class Solution {    public int compareVersion(String version1, String version2) {        String []versionl1 = version1.split("\\.");        String []versionl2 = version2.split("\\.");        int i = 0;        while (i<versionl1.length&&i<versionl2.length){            if (Integer.valueOf(versionl1[i])>Integer.valueOf(versionl2[i])){                return 1;            }else if (Integer.valueOf(versionl1[i])==Integer.valueOf(versionl2[i])){                i++;            }else {                return -1;            }        }        if (i<versionl1.length){            for (;i<versionl1.length;i++){                if (Integer.valueOf(versionl1[i])>0)return 1;            }        }        if (i<versionl2.length){            for (;i<versionl2.length;i++){                if (Integer.valueOf(versionl2[i])>0)return -1;            }        }        return 0;    }}

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