今天项目里遇到以"." 、""、“|”分割字符串，直接用"." 、""、“|”无法分割，因为"." 、""、“|”是特殊字符，需要转义，"." 、""、“|”。
class Solution {
public int compareVersion(String version1, String version2) {
String[] arr1 = version1.split("\.");
String[] arr2 = version2.split("\.");
int n = arr1.length>arr2.length?arr1.length:arr2.length;
int temp1[] = new int [n];
int temp2[] = new int [n];
for(int i = 0 ; i < arr1.length ; i++) {
temp1[i] = Integer.parseInt(arr1[i]);
}
for(int i = 0 ; i < arr2.length ; i++) {
temp2[i] = Integer.parseInt(arr2[i]);
}
int flag = 0;
while(flag<n) {
if(temp1[flag]<temp2[flag])
return -1;
else if(temp1[flag]>temp2[flag])
return 1;
flag++;
}
return 0;
}
}
精简~
class Solution {
public int compareVersion(String s1, String s2) {
int i = 0 ;
int j = 0 ;
while( i < s1.length() || j < s2.length()) {
int x = i ;
int y = j ;
while(x<s1.length()&&s1.charAt(x)!='.')x++;
while(y<s2.length()&&s2.charAt(y)!='.')y++;
int a = i==x?0:Integer.valueOf(s1.substring(i, x));
int b = j==y?0:Integer.valueOf(s2.substring(j, y));
if(a>b)return 1;
else if(a<b)return -1;
i = x+1;
j = y+1;
}
return 0;
}
}