问题
String str = "123456789";
byte[] bytes = str.getBytes();
I want to make the following loop
for (int j = 0; j < bytes.length(); j++) {
b = bytes[j];
}
b will store each byte of my array, but I can't seem to get the length of the array correctly.
Error:cannot find symbol
Problem solved: bytes.length instead of bytes.length()
回答1:
Use bytes.length without the ()
回答2:
See the JLS - 10.7. Array Members:
The members of an array type are all of the following:
The
public final field length, which contains the number of components of the array. length may be positive or zero.
length is a property, not a method. You should write:
bytes.length
回答3:
Its not bytes.length(), its bytes.length
回答4:
In order to get the length of an array, use length. For example:
int[] arr = {1,2,3};
int length = arr.length;
In order to get the length of a string, use length(). For example:
String str = "123";
int length = str.length();
回答5:
getBytes() Encodes the String into a sequence of bytes using the platform's default charset, storing the result into a new byte array.
Try to print the bytes you will see the encoded values which may differ in length compare to original string.
来源：https://stackoverflow.com/questions/22356792/length-of-byte-array