Java 程序打印方形星形图案
在这里,我们将实现一个 Java 程序来打印方形星形图案。我们将打印带对角线和不带对角线的方形星形图案。
示例:
**********************
* *
* *
* *
* *
* *
* *
**********************
进场:
第一步:输入行数和列数。
步骤 2: 对于矩形行,从 1 到行运行外部循环。
for (i = 1; i < = rows; i++)
步骤 3: 对于矩形的列,运行从 1 到列的内部循环。
for (j = 1; j < = columns; j++)
第四步:第一行或最后一行或第一列或最后一列打印星号,否则打印空格。
第五步:打印完一行的所有列后,在内环后打印换行符。
例 1: 无对角线的星形正方形图案
Java 语言(一种计算机语言,尤用于创建网站)
// Java Program to Print Square Pattern
// Case 1: Hollow rectangle
// Importing input output classes
import java.io.*;
// Main class
class GFG {
// Method 1
// To print hollow rectangle
static void print_rectangle(int k, int l)
{
int a, b;
// Nested for loops for iterations
// Outer loop for rows
for (a = 1; a <= k; a++) {
// Inner loop for columns
for (b = 1; b <= l; b++) {
// Condition check using logical OR operator
// over rows and columns positions
// if found at circumference of rectangle
if (a == 1 || a == k || b == 1 || b == l)
// Print the star pattern
System.out.print("*");
else
// Rest inside square print the empty
// spaces
System.out.print(" ");
}
// By now we are done with only 1 row so
// New line
System.out.println();
}
}
// Method 2
// Main driver method
public static void main(String args[])
{
// Declaring and initializing rows and columns
// For square row = columns
// Custom input initialization values
int rows = 8, columns = 22;
// Calling the method1 to print hollow rectangle
// pattern
print_rectangle(rows, columns);
}
}
Output
**********************
* *
* *
* *
* *
* *
* *
**********************
现在更进一步,如上所述,我们只需在矩形内插入空格。在数学中,我们已经遇到了对角线,所以我们也可以在上面的情况下打印它们。
例 2: 带对角线的星形方形图案
Java 语言(一种计算机语言,尤用于创建网站)
// Java Program to Print Square Star pattern
// Case: Primary and secondary diagonal Rectangle Pattern
import java.io.*;
// Mai class
class GFG {
// Method 1
// To print square with primary and secondary diagonal
static void print_squaredi(int k)
{
int a, b;
// Nested 2 for loops for Matrix rinting
// Outer loop for rows
for (a = 1; a <= k; a++) {
// Inner loop for columns
for (b = 1; b <= k; b++) {
// Condition check using OR operator where
// 1\. Printing star as per first 4 checks
// on the circumference of rectangle
// 2\. Fifth check is for diagonals
if (a == 1 || a == k || b == 1 || b == k
|| a == b || b == (k - a + 1))
// Print the star pattern
System.out.print("*");
else
// Print the white spaces
System.out.print(" ");
}
// By now we are over with one row so
// new line
System.out.println();
}
}
// Method 2
// Main driver method
public static void main(String args[])
{
// This time taking square so only one variable
// needs to be declared
// Custom input entry
int rows = 12;
// calling the method1 to print
// square pattern with diagonal
print_squaredi(rows);
}
}
Output
************
** **
* * * *
* * * *
* * * *
* ** *
* ** *
* * * *
* * * *
* * * *
** **
************
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