Java thinks I want to convert char to String using Integer.parseInt()

问题

I get the error message error: incompatible types: char cannot be converted to String return Integer.parseInt(cases2[0]);

but my code is:

public static int standingOvation(String cases){

    char[] cases2 = cases.toCharArray();
    return Integer.parseInt(cases2[0]);
}

Why am I getting the error if i'm clearly trying to convert cases (which is passed in as "11111") to an integer?

回答1:

Try

return Integer.parseInt("" + cases2[0]);

By adding to the empty string "" you convert to a string, which is the right type for Integer.parseInt.

回答2:

The construct cases2[0] will pick the first character out of the cases2 string.

Integer.parseInt() requires a String argument, not a char.

来源：https://stackoverflow.com/questions/29583655/java-thinks-i-want-to-convert-char-to-string-using-integer-parseint