6.2

РАМКА
import java.util.Scanner;

public class Main {

	public static void main(String[] args) {
		Scanner scan = new Scanner(System.in);
		int n = scan.nextInt();
		System.out.print("+");
		for (int i = 0; i < n - 2; i++) {
			System.out.print(" -");

		}
		System.out.print(" +");
		System.out.println();
		for (int k = 0; k < n - 2; k++) {
			System.out.print("|");
			for (int a = 0; a < n - 2; a++) {
				System.out.print(" -");
			}
			System.out.print(" |");
			System.out.println();
		}
		System.out.print("+");
		for (int i = 0; i < n-2 ; i++) {
			System.out.print(" -");

		}
		System.out.print(" +");
	}
}
Diamand

import java.util.*;

class Main {

    public static String makeSymbols(String str, int num) {
        String symbol = "";
        for (int i = 0; i < num; i++) {
            symbol += str;
        }
        return symbol;
    }

    public static void house(int n) {
        int t = 0;
        int s = 0;

        if (n % 2 == 0) {
            s = 2;
            t = (n - s) / 2;
        }
        if (n % 2 != 0) {
            s = 1;
            t = (n - s) / 2;
        }
        String top = makeSymbols("-", t) + makeSymbols("*", s) + makeSymbols("-", t);
        System.out.println(top);
        for (int i = 0; i <= (n - 3) / 2; i++) {
            t--;
            System.out.println(makeSymbols("-", t) + "*"
                    + makeSymbols("-", n - t * 2 - 2) + "*" + makeSymbols("-", t));
        }
        for (int i = 0; i < (n - 3) / 2; i++) {
            t++;
            System.out.println(makeSymbols("-", t) + "*"
                    + makeSymbols("-", n - t * 2 - 2) + "*" + makeSymbols("-", t));
        }
        System.out.println(top);

    }

    public static void main(String[] args) {
        Scanner scan = new Scanner(System.in);
        int n = scan.nextInt();

        if (n == 2 || n==1){
            System.out.println(makeSymbols("*",n));
        }else {
            house(n);
        }
    }
}