Using String.getBytes(buffer, len) to get char bytes.

"len" is the length to copy, but usually need to add 1 for the end of string '\0'.

For example:

String s = "123";
int count = s.length();  // lenth() is 3
s.getBytes(buffer, count);   // copied "12\0" => HEX(31 32 00)
s.getBytes(buffer, count + 1);   // copied "123\0" => HEX(31 32 33 00)

The official document not mentioned those above, and it not reasonable for the modern function design.

Misunderstanding in that and waste our life so much.

Using String.getBytes(buffer, len) to get bytes.

"len" is the length to copy, but usually need to add 1 for the end of string '\0'.

For example:

String s = "123";
int count = s.length();  // lenth() is 3
s.getBytes(buffer, count);   // copied "12\0" => HEX(31 32 00)
s.getBytes(buffer, count + 1);   // copied "123\0" => HEX(31 32 33 00)

The official document not mentioned those above, and it's not reasonable for the modern function design.

Misunderstanding in that and waste our life so much.

Using String.getBytes(buffer, len) to get char bytes.

"len" is the length to copy, but usually need to add 1 for the end of string '\0'.

For example:

String s = "123";
int count = s.length() + 1;  // 3 + 1 = 4
s.getBytes(buffer, count);   // it will copy 3 bytes only even count = 4.

The official document not mentioned those above. Waste our life so much.

Using String.getBytes(buffer, len) to get char bytes.

"len" is the length to copy, but usually need to add 1 for the end of string '\0'.

For example:

String s = "123";
int count = s.length();  // lenth() is 3
s.getBytes(buffer, count);   // copied "12\0" => HEX(31 32 00)
s.getBytes(buffer, count + 1);   // copied "123\0" => HEX(31 32 33 00)

The official document not mentioned those above, and it not reasonable for the modern function design.

Misunderstanding in that and waste our life so much.