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/* package whatever; // don't place package name! */
 
import java.util.stream.*;
import java.util.*;
import java.lang.*;
import java.io.*;
 
final class Rectangle {
 
	private final double width;
	private final double height;
 
	public Rectangle(final double width, final double height) {
		this.width = width;
		this.height = height;
	}
 
	public double square() {
		return width * height;
	}
 
	@Override
	public String toString() {
		return String.format("%s{ width = %f ; height = %f }",
				getClass().getSimpleName(), width, height);
	}
}
 
final class Circle {
 
	private final double radius;
 
	public Circle(final double radius) {
		this.radius = radius;
	}
 
	public double square() {
		return Math.PI * radius * radius;
	}
 
	@Override
	public String toString() {
		return String.format("%s{ radius = %f }",
				getClass().getSimpleName(), radius);
	}
}
 
/* Name of the class has to be "Main" only if the class is public. */
class Ideone {
 
	private static void printSquares(final ?... figures) {
		Stream.of(figures).forEach(f ->
				System.out.printf("%s square = %f%n", f.toString(), f.square()));
	}
 
	public static void main (String[] args) throws java.lang.Exception {
		printSquares(new Rectangle(3, 4), new Circle(2));
	}
}

Main.java:51: error: illegal start of type
	private static void printSquares(final ?... figures) {
	                                       ^
Main.java:51: error: ')' expected
	private static void printSquares(final ?... figures) {
	                                        ^
Main.java:51: error: ';' expected
	private static void printSquares(final ?... figures) {
	                                           ^
Main.java:51: error: illegal start of type
	private static void printSquares(final ?... figures) {
	                                                   ^
Main.java:51: error: <identifier> expected
	private static void printSquares(final ?... figures) {
	                                                    ^
Main.java:51: error: ';' expected
	private static void printSquares(final ?... figures) {
	                                                      ^
Main.java:52: error: illegal start of type
		Stream.of(figures).forEach(f ->
		      ^
Main.java:52: error: <identifier> expected
		Stream.of(figures).forEach(f ->
		                 ^
Main.java:52: error: ';' expected
		Stream.of(figures).forEach(f ->
		                  ^
Main.java:56: error: class, interface, or enum expected
	public static void main (String[] args) throws java.lang.Exception {
	              ^
Main.java:58: error: class, interface, or enum expected
	}
	^
11 errors

Standard output is empty