About synchronized in java.io.PrintStream

Question

Does anybody know why the member call println of PrintStream is synchronized?

For example: public synchronized void println (String str)

But why there is no synchronized for public void println (char[] chars) ?

Answer 1

I have checked the given link

As per the method signature it says println(String) is synchronized and println(char[]) is not. However, when you read the description of println(char[]) it says it prints the string representation of the given char[] ie it implicitly converts the given char[] to String and calls the println(String) method.

So even though println(char[]) is not synchronized it achieves the synchronization implicitly by calling println(String) .