java 使用android从字母数字字符串中提取数字
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Extract numbers from an alpha numeric string using android
提问by Prasanth_AndroidJD
I have to extract only numeric values from String str="sdfvsdf68fsdfsf8999fsdf09".
How can I extract numbers from an alpha numeric string in android?
我必须只从String str="sdfvsdf68fsdfsf8999fsdf09". 如何从android中的字母数字字符串中提取数字？
回答by Mohammed Azharuddin Shaikh
String str="sdfvsdf68fsdfsf8999fsdf09";
String numberOnly= str.replaceAll("[^0-9]", "");
update:
更新：
String str="fgdfg12°59'50\" Nfr | gdfg: 80°15'25\" Efgd";
String[] spitStr= str.split("\|");
String numberOne= spitStr[0].replaceAll("[^0-9]", "");
String numberSecond= spitStr[1].replaceAll("[^0-9]", "");
回答by Vinay Kumar Baghel
public static String getOnlyNumerics(String str) {
if (str == null) {
return null;
}
StringBuffer strBuff = new StringBuffer();
char c;
for (int i = 0; i < str.length() ; i++) {
c = str.charAt(i);
if (Character.isDigit(c)) {
strBuff.append(c);
}
}
return strBuff.toString();
}
回答by Sean Das
public static int extractNumberFromAnyAlphaNumeric(String alphaNumeric) {
alphaNumeric = alphaNumeric.length() > 0 ? alphaNumeric.replaceAll("\D+", "") : "";
int num = alphaNumeric.length() > 0 ? Integer.parseInt(alphaNumeric) : 0; // or -1
return num;
}
You can set the value to 0 or -1 (what to do if no number is found in the alphanumeric at all) as per your needs
您可以根据需要将该值设置为 0 或 -1（如果在字母数字中根本找不到数字该怎么办）
