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Compare Version Numbers
Compare Version Numbers
Compare two version numbers version1 and version1.
If version1 > version2 return 1, if version1 < version2 return -1, otherwise return 0.
You may assume that the version strings are non-empty and contain only digits and the . character.
The . character does not represent a decimal point and is used to separate number sequences.
For instance, 2.5 is not "two and a half" or "half way to version three", it is the fifth second-level revision of the second first-level revision.
Here is an example of version numbers ordering:
0.1 < 1.1 < 1.2 < 13.37
1 public class Solution { 2 public int compareVersion(String version1, String version2) { 3 String ver1_ch[] = version1.split("\\."); 4 String ver2_ch[] = version2.split("\\."); 5 6 int i = 0; 7 for(; i < ver1_ch.length && i <ver2_ch.length; i++){ 8 9 if(Integer.valueOf(ver1_ch[i]) > Integer.valueOf(ver2_ch[i]))10 return 1;11 else if(Integer.valueOf(ver1_ch[i]) < Integer.valueOf(ver2_ch[i]))12 return -1;13 }14 if(i >= ver1_ch.length && i >= ver2_ch.length)15 return 0;16 else if(i >= ver1_ch.length){17 for(; i < ver2_ch.length; i++){18 if(Integer.valueOf(ver2_ch[i]) > 0)19 return -1;20 }21 return 0;22 }23 else24 {25 for(; i < ver1_ch.length; i++){26 if(Integer.valueOf(ver1_ch[i]) > 0)27 return 1;28 }29 return 0;30 }31 }32 }
Compare Version Numbers
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