IO class in Java 25

Mon, 22 Sep 2025 13:49:49 +0000

IO class of Java 25

Java 25 intrroduced a new class called IO in java.lang package, in order to avoid writing longer code when using System.out.println.

I found a difference in the behaviour from the System.out.println

Just try the following main method.

public static void main(String[] args) {
   char[] msg = {'H','e','l','l','o'};
   IO.println(msg);
   System.out.println(msg);
}

I know println in PrintStream handled char[] specially and not just using the toString method.

Can we expect the IO class println method to be consistent with the PrintStream's println?

This is as of

$ java -version
java version "25" 2025-09-16 LTS
Java(TM) SE Runtime Environment (build 25+37-LTS-3491)
Java HotSpot(TM) 64-Bit Server VM (build 25+37-LTS-3491, mixed mode, sharing)

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IO class in Java 25