import java.util.Scanner;//導入Scanner類所在的包
public class RightTriangle{
    public static void main(String[] args){
        Scanner myScanner = new Scanner(System.in);//創(chuàng)建一個新的Scanner類用來接受總層數(shù)totalLevel
        System.out.println("請輸入總層數(shù)totalLevel：");
        int totalLevel = myScanner.nextInt();
        for (int i = 1 ; i <= totalLevel ; i++ ) {//一共要打印的總層數(shù)
            for (int j = 1 ; j <= 2 * i -1 ; j ++) {//每一層要打印的星星的個數(shù)（2*N-1）
                System.out.print("*");
            }
            System.out.println();
        }
    }
}

import java.util.Scanner;
public class SolidTriangle{
    public static void main(String[] args){
        Scanner myScanner = new Scanner(System.in);//創(chuàng)建一個新的Scanner類用來接受總層數(shù)totalLevel
        System.out.println("請輸入總層數(shù)totalLevel：");
        int totalLevel = myScanner.nextInt();
        for (int i = 1 ; i <= totalLevel ; i++ ) {//一共要打印的總層數(shù)
            for (int j = 1 ; j <= totalLevel - i ; j++ ) {//每一層要打印的空格數(shù)
                System.out.print(" ");
            }
            for (int k = 1 ; k <= 2 * i -1 ; k ++) {//每一層要打印的星星的個數(shù)（2*N-1）
                System.out.print("*");
            }
            System.out.println();
        }
    }
}

import java.util.Scanner;
public class HollowTriangle{
    public static void main(String[] args){
        Scanner myScanner = new Scanner(System.in);
        System.out.print("請輸入總層數(shù)：");
        int totalLevel = myScanner.nextInt();
        for (int i = 1 ; i <= totalLevel ; i++ ) {//一共要打印的層數(shù)
            if (i == totalLevel) {
                for (int m = 1 ; m <= 2 * i - 1 ; m++ ) {
                    System.out.print("*");
                }
            }else{
                for (int j = 1 ; j <= totalLevel - i ; j++ ) {//每層要打印的第一批空格數(shù)
                System.out.print(" ");
            }
            System.out.print("*");
            for (int k = 1 ; k <= 2 * i - 3 ; k++ ) {//每層要打印的第二批的空格數(shù)
                System.out.print(" ");
            }
            if (i != 1) {
                System.out.print("*");
            }
            System.out.println();
            }
        }
    }
}

import java.util.Scanner;
public class HollowDiamond{
    public static void main(String[] args){
        Scanner myScanner = new Scanner(System.in);
        System.out.print("請輸入上層總層數(shù)：");
        int totalLevel = myScanner.nextInt();
        //打印菱形的上半部分
        for (int i = 1 ; i <= totalLevel ; i++ ) {//上層所需要打印的總層數(shù)
            for (int j = 1; j <= totalLevel - i ;  j++) {//每層要打印的空格數(shù)（就是總層數(shù)減去所在的層數(shù)）
                System.out.print(" ");
            }
            for (int k = 1; k <= 2 * i - 1; k++ ) {//每一行要輸入的星星的數(shù)量（所打印的星星的總數(shù)是2*N-1）
                if (k == 1 || k == 2*i - 1 ) {//第一個和最后一個打印星星，其余打印空格
                    System.out.print("*");
                }else{
                    System.out.print(" ");
                }
            }
            System.out.println();//每一行結(jié)束后就進行換行的操作.
        }
        //打印菱形的下半部分
        for (int m = 1 ; m <= totalLevel -1 ; m++) {//因為菱形是對稱的所以下面的總層數(shù)是上層總層數(shù)減去一才能構(gòu)成菱形
            for (int n = 1; n <= m ; n ++ ) {
                System.out.print(" ");
            }
            for (int p = 1; p <= 2 * (totalLevel - m) -1 ;  p++) {//每一行要輸入的星星的數(shù)量
                if (p == 1 || p == 2 * (totalLevel - m) - 1) {//totalLevel- m就是方便的轉(zhuǎn)換，比如說上層一共有五層，那么第六行和第四行的情況一樣
                    System.out.print( "*");
                }else{
                    System.out.print(" ");
                }
            }
            System.out.println();//每一行結(jié)束后就進行換行的操作.
        }
    }
}