1 //1.菱形
2 public static void Lingxing(int size){
3 if(size % 2 == 0){
4 size++;//计算菱形大小
5 }
6 //输出菱形上半部
7 for (int i = 0; i < size/2 + 1; i++) {
8 for (int j = size/2 + 1; j > i + 1; j--) {
9 System.out.print(" ");//输出左上角位置的空白
10 }
11 for (int j = 0; j < 2*i + 1; j++) {
12 System.out.print("*");//输出菱形上半部
13 }
14 System.out.println();// 换行
15 }
16 // 输出菱形下半部
17 for (int i = size/2 + 1; i < size; i++) {
18 for (int j = 0; j < i - size/2; j++) {
19 System.out.print(" ");// 输出菱形左下角空白
20 }
21 for (int j = 0; j < 2*size-1 - 2*i ; j++) {
22 System.out.print("*");// 输出菱形下半部
23 }
24 System.out.println();
25 }
26 }
27
28 // 2.九九乘法表
29 public static void MultiplicationTable(){
30 for (int i = 1; i <= 9; i++) {
31 for (int j = 1; j <= i; j++) {
32 System.out.print(j+"x"+i+"="+i*j+"\t");// \t 跳到下一个TAB位置
33 }
34 System.out.println("");
35 }
36 }
37
38 //3. 打印三角形
39 public static void Triangle(int n){
40 for (int i = 0; i <= n; i++) {
41 for (int j = n; j >= i; j--) {
42 System.out.print(" ");//建立1号图形
43 }
44 for (int j = 1; j <= i; j++) {
45 System.out.print("*");//建立2号图形
46 }
47 for (int j = 1; j < i; j++) {
48 System.out.print("*");//建立3号图形
49 }
50 System.out.println("");
51 }
52 }
53
54 //4.打印倒立的三角形
55 public static void InvertedTriangle (int i) {
56 //打印倒立的三角形
57 for (int m = 1; m <= i; m++) {
58 //打印空格
59 for (int n = 0; n <= m; n++) {
60 System.out.print(" ");
61 }
62 //打印*
63 for (int x = 1; x <= 2*(i - m) + 1; x++) {
64 System.out.print("*");
65 }
66 System.out.println();
67 }
68 }
69
70 //5.打印平行四边形
71 public static void Parallelogram (int n) {
72 //外层循环 每次打出一个*
73 for (int i = 1; i <=n; i++) {
74 //填充空格
75 for (int j = 1; j <= n - i; j++) {
76 System.out.print(" ");
77 }
78 //内层循环 每次打印一个*
79 for (int k = 1; k <=n; k++) {
80 System.out.print("*");
81 }
82 System.out.println();
83 }
84 }
85
86 //6.打印平行四边形
87 public static void Rectangle (int n) {
88 //外层循环 每次打出一个*
89 for (int i = 1; i <=n; i++) {
90 //外层循环 每次输出一行*
91 System.out.print("*");
92
93 //内层循环 每次打印一个*
94 for (int k = 1; k <=n; k++) {
95 System.out.print("*");
96 }
97 System.out.println();
98 }
99 }
