Java: Printing ALL Args as single string

You can simply String.join the strings together and print them. Like:

public class Foo {

    public static void main(String [] args) {

        System.out.println(String.join(" ",args));
    }

}

The first argument, the delimiter, is here " " (a string containing one space). Such that there is a space between two arguments.

Note that this program is almost identical to the echo program you see on a lot of operating systems.

Finally note that although this program does not contain a loop, the String.join definitely need some form of looping inside the method.