【JAVA】java循环语句*案例二：各种星星

心已赠人 2022-05-22 08:45 151阅读 0赞

package com.test;  
  
public class LoopDemo2 \{  
public static void main(String\[\] args) \{  
  
for (int i = 0; i < 10; i++) \{  
for (int j = 0; j < i; j++) \{  
System.out.print("\*");  
\}  
System.out.println();  
\}  
  
System.out.println();  
System.out.println("\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*分割符\*\*\*\*\*\*\*\*\*\*\*\*\*");  
System.out.println();  
  
for (int i = 10; i > 0; i--) \{  
for (int j = 0; j < i; j++) \{  
System.out.print("\*");  
\}  
System.out.println();  
\}  
  
System.out.println();  
System.out.println("\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*分割符\*\*\*\*\*\*\*\*\*\*\*\*\*");  
System.out.println();  
  
for (int i = 0; i < 10; i++) \{  
for (int j = 0; j < 2 \* i - 1; j++) \{  
System.out.print("\*");  
\}  
System.out.println();  
\}  
  
System.out.println();  
System.out.println("\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*分割符\*\*\*\*\*\*\*\*\*\*\*\*\*");  
System.out.println();  
  
// 平行四边形  
for (int i = 1; i <= 5; i++) \{  
for (int j = 1; j <= (5 - i); j++) \{  
System.out.print(" ");  
\}  
for (int k = 1; k <= 5; k++) \{  
System.out.print("\*");  
\}  
System.out.println();  
\}  
  
System.out.println();  
System.out.println("\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*分割符\*\*\*\*\*\*\*\*\*\*\*\*\*");  
System.out.println();  
  
// 矩形  
for (int j = 1; j <= 5; j++) \{  
for (int i = 1; i <= 5; i++) \{  
System.out.print("\*");  
\}  
System.out.println();  
\}  
  
System.out.println();  
System.out.println("\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*分割符\*\*\*\*\*\*\*\*\*\*\*\*\*");  
System.out.println();  
  
// 等腰三角形  
for (int i = 1; i <= 6; i++) \{  
for (int j = 1; j <= 6 - i; j++) \{  
System.out.print(" ");  
\}  
for (int k = 1; k <= (2 \* i) - 1; k++) \{  
System.out.print("\*");  
\}  
System.out.println();  
\}  
  
System.out.println();  
System.out.println("\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*分割符\*\*\*\*\*\*\*\*\*\*\*\*\*");  
System.out.println();  
  
// 棱形  
for (int i = 1; i <= 6; i++) \{  
for (int j = 1; j <= 6 - i; j++) \{  
System.out.print(" ");  
\}  
for (int k = 1; k <= (2 \* i) - 1; k++) \{  
System.out.print("\*");  
\}  
System.out.println();  
\}  
for (int a = 1; a <= 5; a++) \{  
for (int b = 1; b <= a; b++) \{  
System.out.print(" ");  
\}  
for (int c = 1; c <= 9 - 2 \* (a - 1); c++) \{  
System.out.print("\*");  
\}  
System.out.println();  
\}  
  
System.out.println();  
System.out.println("\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*\*分割符\*\*\*\*\*\*\*\*\*\*\*\*\*");  
System.out.println();  
  
// 倒三角形  
for (int j = 4; j > 0; j--) \{  
for (int k = 1; k <= 5 - j; k++) \{  
System.out.print(" ");  
\}  
for (int a = 1; a <= 2 \* j - 1; a++) \{  
System.out.print("\*");  
\}  
System.out.println();  
\}  
\}

案例截图：

![70][]

![70 1][]

![70 2][]

![70 3][]

[70]: /images/20220522/4c29d5d9843f43d9ad35752ea333328a.png
[70 1]: /images/20220522/e0fe54d2abbe4ae5838bec9d632a1d7f.png
[70 2]: /images/20220522/029c32a02cd44474a0d9f20e9058393a.png
[70 3]: /images/20220522/ba6acaeb188940f9805db408a342a879.png