Methods of Detection, English and Chinese

public static Boolean isenglish (String str) {

Return Str.matches ("^[a-za-z.,!?] *");

}

public static Boolean Ischinese (String str) {//detection contains Chinese

String regEx = "[\\u4e00-\\u9fa5]+";

Pattern p = pattern.compile (regEx);

Matcher m = p.matcher (str);

if (M.find ()) {

return true;

} else {

return false;

}

}

Static Boolean isnumber (String str)

{

Pattern Pattern=pattern.compile ("-?[ 0-9]*[.]? [0-9]* ");

Matcher Match=pattern.matcher (str);

if (Match.matches () ==false)

{

return false;

}

Else

{

return true;

}

}

}

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Extract string in, English, number

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String str1 = Str.replaceall ("[^\\u4e00-\\u9fa5]", "");

String str2 = Str.replaceall ("[^0-9]", "");

String STR3 = Str.replaceall ("[^a-za-z]", "");

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Methods of Detection, English and Chinese