hlindberg · September 17, 2018 18:39
diff --git a/comma_separated_list.java b/comma_separated_list.java
 StringJoiner joiner = new StringJoiner(",");
 for (Item item : list) {
    joiner.add(item.toString());
 }
 return joiner.toString();
diff --git a/hello_world.java b/hello_world.java
    public static void main(String[] args) {
        // Prints "Hello, World" to the terminal window.
        System.out.println("Hello, World");
    }
	StringJoiner joiner = new StringJoiner(",");
	for (Item item : list) {
	joiner.add(item.toString());
	}
	return joiner.toString();
	public static void main(String[] args) {
	// Prints "Hello, World" to the terminal window.
	System.out.println("Hello, World");
	}