Patterns:-拾光赋

for loop:

When you know exactly how many times you want to loop through a block of code, use the for loop instead of a while loop.

Syntax:

for (statement 1; statement 2; statement 3) {
// code block to be executed
}

Statement 1 is executed (one time) before the execution of the code block.

Statement 2 defines the condition for executing the code block.

Statement 3 is executed (every time) after the code block has been executed.

Example:
public class Main {
public static void main(String[] args) {
for (int i = 0; i < 5; i++) {
System.out.println(i);
}

}
}

output:
0
1
2
3
4

shape pattern:


package B1;
public class Shape {
    public static void main(String[] args) {
        //shape1();
        //shape2();
         //shape3();
         //shape4();
         //shape5();
         //shape6();
         //shape7();
    }
    private static void shape7() {
        for (int row = 1; row <= 9; row++) {
            for (int col = 1; col <= 9; col++) {
                if(row+col==10||row==col)
                System.out.print("* ");
                else if(row==1||col==1||row==9)
                System.out.print("* ");
                else
                System.out.print("  ");
            }
            System.out.println();
        }
    }
output:
* * * * * * * * * 
* *           *   
*   *       *     
*     *   *       
*       *         
*     *   *       
*   *       *     
* *           *   
* * * * * * * * * 
    private static void shape6() {
        for (int row = 1; row <= 9; row++) {
            for (int col = 1; col <= 9; col++) {
                if(row+col==10||row==col)
                System.out.print("* ");
                else if(row==1||col==9||row==9)
                System.out.print("* ");
                else
                System.out.print("  ");
            }
            System.out.println();
        }
    }
output:
* * * * * * * * * 
  *           * * 
    *       *   * 
      *   *     * 
        *       * 
      *   *     * 
    *       *   * 
  *           * * 
* * * * * * * * * 
    private static void shape5() {
        for (int row = 1; row <= 9; row++) {
            for (int col = 1; col <= 9; col++) {
                if(row+col==10||row==col)
                System.out.print("* ");
                else if(col==1||col==9||row==1)
                System.out.print("* ");
                else
                System.out.print("  ");
            }
            System.out.println();
        }
    }
output:
*               * 
* *           * * 
*   *       *   * 
*     *   *     * 
*       *       * 
*     *   *     * 
*   *       *   * 
* *           * * 
* * * * * * * * * 
    private static void shape4() {
        for (int row = 1; row <= 9; row++) {
            for (int col = 1; col <= 9; col++) {
                if(row+col==10||row==col)
                System.out.print("* ");
                else if(col==1||col==9||row==9)
                System.out.print("* ");
                else
                System.out.print("  ");
            }
            System.out.println();
        }
    }
output:
*               * 
* *           * * 
*   *       *   * 
*     *   *     * 
*       *       * 
*     *   *     * 
*   *       *   * 
* *           * * 
* * * * * * * * * 
    private static void shape3() {
        for (int row = 1; row <= 9; row++) {
            for (int col = 1; col <= 9; col++) {
                if(row+col==10||row==col)
                System.out.print("* ");
                else if(col==1||col==9)
                System.out.print("* ");
                else
                System.out.print("  ");
            }
            System.out.println();
        }
    }
output:
*               * 
* *           * * 
*   *       *   * 
*     *   *     * 
*       *       * 
*     *   *     * 
*   *       *   * 
* *           * * 
*               * 
    private static void shape2() {
        for (int row = 1; row <= 9; row++) {
            for (int col = 1; col <= 9; col++) {
                if(row==1||row==9||row==col)
                System.out.print("* ");
                else if(row+col==10||col==1||col==9)
                System.out.print("* ");
                else
                System.out.print("  ");
            }
            System.out.println();
        }
    }
output:
* * * * * * * * * 
* *           * * 
*   *       *   * 
*     *   *     * 
*       *       * 
*     *   *     * 
*   *       *   * 
* *           * * 
* * * * * * * * * 
    private static void shape1() {
        for (int row = 1; row <= 9; row++) {
            for (int col = 1; col <= 9; col++) {
                if(row==1||row==9||row==col)
                System.out.print("* ");
                else if(row+col==10)
                System.out.print("* ");
                else
                System.out.print("  ");
            }
            System.out.println();
        }
        }
}
output:
* * * * * * * * * 
  *           *   
    *       *     
      *   *       
        *         
      *   *       
    *       *     
  *           *   
* * * * * * * * * 
package B1;

public class Shape {

    public static void main(String[] args) {
        //shape1();
        //shape2();
         //shape3();
         //shape4();
         //shape5();
         //shape6();
         //shape7();
    }

    private static void shape7() {
        for (int row = 1; row <= 9; row++) {
            for (int col = 1; col <= 9; col++) {
                if(row+col==10||row==col)
                System.out.print("* ");
                else if(row==1||col==1||row==9)
                System.out.print("* ");
                else
                System.out.print("  ");
            }
            System.out.println();
        }

    }
output:


* * * * * * * * * 
* *           *   
*   *       *     
*     *   *       
*       *         
*     *   *       
*   *       *     
* *           *   
* * * * * * * * * 

    private static void shape6() {
        for (int row = 1; row <= 9; row++) {
            for (int col = 1; col <= 9; col++) {
                if(row+col==10||row==col)
                System.out.print("* ");
                else if(row==1||col==9||row==9)
                System.out.print("* ");
                else
                System.out.print("  ");
            }
            System.out.println();
        }

    }
output:

* * * * * * * * * 
  *           * * 
    *       *   * 
      *   *     * 
        *       * 
      *   *     * 
    *       *   * 
  *           * * 
* * * * * * * * * 


    private static void shape5() {
        for (int row = 1; row <= 9; row++) {
            for (int col = 1; col <= 9; col++) {
                if(row+col==10||row==col)
                System.out.print("* ");
                else if(col==1||col==9||row==1)
                System.out.print("* ");
                else
                System.out.print("  ");
            }
            System.out.println();
        }


    }
output:

*               * 
* *           * * 
*   *       *   * 
*     *   *     * 
*       *       * 
*     *   *     * 
*   *       *   * 
* *           * * 
* * * * * * * * * 


    private static void shape4() {
        for (int row = 1; row <= 9; row++) {
            for (int col = 1; col <= 9; col++) {
                if(row+col==10||row==col)
                System.out.print("* ");
                else if(col==1||col==9||row==9)
                System.out.print("* ");
                else
                System.out.print("  ");
            }
            System.out.println();
        }



    }
output:

*               * 
* *           * * 
*   *       *   * 
*     *   *     * 
*       *       * 
*     *   *     * 
*   *       *   * 
* *           * * 
* * * * * * * * * 


    private static void shape3() {
        for (int row = 1; row <= 9; row++) {
            for (int col = 1; col <= 9; col++) {
                if(row+col==10||row==col)
                System.out.print("* ");
                else if(col==1||col==9)
                System.out.print("* ");
                else
                System.out.print("  ");
            }
            System.out.println();
        }

    }
output:

*               * 
* *           * * 
*   *       *   * 
*     *   *     * 
*       *       * 
*     *   *     * 
*   *       *   * 
* *           * * 
*               * 


    private static void shape2() {
        for (int row = 1; row <= 9; row++) {
            for (int col = 1; col <= 9; col++) {
                if(row==1||row==9||row==col)
                System.out.print("* ");
                else if(row+col==10||col==1||col==9)
                System.out.print("* ");
                else
                System.out.print("  ");
            }
            System.out.println();
        }

    }
output:

* * * * * * * * * 
* *           * * 
*   *       *   * 
*     *   *     * 
*       *       * 
*     *   *     * 
*   *       *   * 
* *           * * 
* * * * * * * * * 


    private static void shape1() {
        for (int row = 1; row <= 9; row++) {
            for (int col = 1; col <= 9; col++) {
                if(row==1||row==9||row==col)
                System.out.print("* ");
                else if(row+col==10)
                System.out.print("* ");
                else
                System.out.print("  ");
            }
            System.out.println();
        }
        }

}
output:

* * * * * * * * * 
  *           *   
    *       *     
      *   *       
        *         
      *   *       
    *       *     
  *           *   
* * * * * * * * * 
package B1;

public class Shape {

    public static void main(String[] args) {
        //shape1();
        //shape2();
         //shape3();
         //shape4();
         //shape5();
         //shape6();
         //shape7();
    }

    private static void shape7() {
        for (int row = 1; row <= 9; row++) {
            for (int col = 1; col <= 9; col++) {
                if(row+col==10||row==col)
                System.out.print("* ");
                else if(row==1||col==1||row==9)
                System.out.print("* ");
                else
                System.out.print("  ");
            }
            System.out.println();
        }

    }
output:


* * * * * * * * * 
* *           *   
*   *       *     
*     *   *       
*       *         
*     *   *       
*   *       *     
* *           *   
* * * * * * * * * 

    private static void shape6() {
        for (int row = 1; row <= 9; row++) {
            for (int col = 1; col <= 9; col++) {
                if(row+col==10||row==col)
                System.out.print("* ");
                else if(row==1||col==9||row==9)
                System.out.print("* ");
                else
                System.out.print("  ");
            }
            System.out.println();
        }

    }
output:

* * * * * * * * * 
  *           * * 
    *       *   * 
      *   *     * 
        *       * 
      *   *     * 
    *       *   * 
  *           * * 
* * * * * * * * * 


    private static void shape5() {
        for (int row = 1; row <= 9; row++) {
            for (int col = 1; col <= 9; col++) {
                if(row+col==10||row==col)
                System.out.print("* ");
                else if(col==1||col==9||row==1)
                System.out.print("* ");
                else
                System.out.print("  ");
            }
            System.out.println();
        }


    }
output:

*               * 
* *           * * 
*   *       *   * 
*     *   *     * 
*       *       * 
*     *   *     * 
*   *       *   * 
* *           * * 
* * * * * * * * * 


    private static void shape4() {
        for (int row = 1; row <= 9; row++) {
            for (int col = 1; col <= 9; col++) {
                if(row+col==10||row==col)
                System.out.print("* ");
                else if(col==1||col==9||row==9)
                System.out.print("* ");
                else
                System.out.print("  ");
            }
            System.out.println();
        }



    }
output:

*               * 
* *           * * 
*   *       *   * 
*     *   *     * 
*       *       * 
*     *   *     * 
*   *       *   * 
* *           * * 
* * * * * * * * * 


    private static void shape3() {
        for (int row = 1; row <= 9; row++) {
            for (int col = 1; col <= 9; col++) {
                if(row+col==10||row==col)
                System.out.print("* ");
                else if(col==1||col==9)
                System.out.print("* ");
                else
                System.out.print("  ");
            }
            System.out.println();
        }

    }
output:

*               * 
* *           * * 
*   *       *   * 
*     *   *     * 
*       *       * 
*     *   *     * 
*   *       *   * 
* *           * * 
*               * 


    private static void shape2() {
        for (int row = 1; row <= 9; row++) {
            for (int col = 1; col <= 9; col++) {
                if(row==1||row==9||row==col)
                System.out.print("* ");
                else if(row+col==10||col==1||col==9)
                System.out.print("* ");
                else
                System.out.print("  ");
            }
            System.out.println();
        }

    }
output:

* * * * * * * * * 
* *           * * 
*   *       *   * 
*     *   *     * 
*       *       * 
*     *   *     * 
*   *       *   * 
* *           * * 
* * * * * * * * * 


    private static void shape1() {
        for (int row = 1; row <= 9; row++) {
            for (int col = 1; col <= 9; col++) {
                if(row==1||row==9||row==col)
                System.out.print("* ");
                else if(row+col==10)
                System.out.print("* ");
                else
                System.out.print("  ");
            }
            System.out.println();
        }
        }

}
output:

* * * * * * * * * 
  *           *   
    *       *     
      *   *       
        *         
      *   *       
    *       *     
  *           *   
* * * * * * * * *

Enter fullscreen mode Exit fullscreen mode

Letters pattern:


package B1;
public class Spattern2 {
    public static void main(String[] args) {
        //patternE();
        //patternI();
        //patternL();
        //patternF();
        //patternH();
        //patternM();(TBD)
        //patternK();
    }
    private static void patternK() {
        for(int row = 1; row<=9; row++)
        {
            for(int col=1; col<=9; col++) {
                if(row+col==6|| col==1)
                    System.out.print("* "); 
                else if(col==row-4)
                    System.out.print("* "); 
                else
                    System.out.print("  "); 
        }
               System.out.println(); 
        }
    }
output:
*       *         
*     *           
*   *             
* *               
*                 
* *               
*   *             
*     *           
*       * 
    private static void patternM() {
        for(int row = 1; row<=9; row++)
        {
            for(int col=1; col<=9; col++) {
                if(col==1||col==9-1)
                    System.out.print("* "); 
                else if(row==col&&col<=9/2||row+col==9-1&&col>=9/2)
                    System.out.print("* "); 
                else
                    System.out.print("  ");
        }
               System.out.println(); 
        }
    }
output:
*           * *   
* *       *   *   
*   *   *     *   
*     *       *   
*             *   
*             *   
*             *   
*             *   
*             *   
    private static void patternH() {
        for(int row = 1; row<=9; row++)
        {
            for(int col=1; col<=9; col++) {
                if(col==9|| row==5||col==1)
                    System.out.print("* "); 
                else
                    System.out.print("  "); 
        }
               System.out.println(); 
        }
    }
output:
*               * 
*               * 
*               * 
*               * 
* * * * * * * * * 
*               * 
*               * 
*               * 
*               * 
    private static void patternF() {
        for(int row = 1; row<=9; row++)
        {
            for(int col=1; col<=9; col++) {
                if(row==1|| row==5||col==1)
                    System.out.print("* "); 
                else
                    System.out.print("  "); 
        }
               System.out.println(); 
        }
    }
output:
* * * * * * * * * 
*                 
*                 
*                 
* * * * * * * * * 
*                 
*                 
*                 
*                 
    private static void patternL() {
        for(int row = 1; row<=9; row++)
        {
            for(int col=1; col<=9; col++) {
                if(row==9||col==1)
                    System.out.print("* "); 
                else
                    System.out.print("  "); 
        }
               System.out.println(); 
        }
    }
output:
*                 
*                 
*                 
*                 
*                 
*                 
*                 
*                 
* * * * * * * * * 
    private static void patternI() {
        for(int row = 1; row<=9; row++)
        {
            for(int col=1; col<=9; col++) {
                if(row==1||row==9||col==5)
                    System.out.print("* "); 
                else
                    System.out.print("  "); 
        }
               System.out.println(); 
        }
    }
output:
* * * * * * * * * 
        *         
        *         
        *         
        *         
        *         
        *         
        *         
* * * * * * * * * 
    private static void patternE() {
        for(int row = 1; row<=9; row++)
        {
            for(int col=1; col<=9; col++) {
                if(row==1||row==9||col==1)
                    System.out.print("* "); 
                else if(row==5)
                    System.out.print("* "); 
                else
                    System.out.print("  "); 
        }
               System.out.println(); 
        }
    }
    }
output:
* * * * * * * * * 
*                 
*                 
*                 
* * * * * * * * * 
*                 
*                 
*                 
* * * * * * * * * 
package B1;
public class Spattern2 {

    public static void main(String[] args) {
        //patternE();
        //patternI();
        //patternL();
        //patternF();
        //patternH();
        //patternM();(TBD)
        //patternK();
    }

    private static void patternK() {
        for(int row = 1; row<=9; row++)
        {
            for(int col=1; col<=9; col++) {
                if(row+col==6|| col==1)
                    System.out.print("* "); 
                else if(col==row-4)
                    System.out.print("* "); 
                else
                    System.out.print("  "); 
        }
               System.out.println(); 
        }


    }
output:

*       *         
*     *           
*   *             
* *               
*                 
* *               
*   *             
*     *           
*       * 

    private static void patternM() {
        for(int row = 1; row<=9; row++)
        {
            for(int col=1; col<=9; col++) {
                if(col==1||col==9-1)
                    System.out.print("* "); 
                else if(row==col&&col<=9/2||row+col==9-1&&col>=9/2)
                    System.out.print("* "); 
                else
                    System.out.print("  ");
        }
               System.out.println(); 
        }


    }
output:

*           * *   
* *       *   *   
*   *   *     *   
*     *       *   
*             *   
*             *   
*             *   
*             *   
*             *   


    private static void patternH() {
        for(int row = 1; row<=9; row++)
        {
            for(int col=1; col<=9; col++) {
                if(col==9|| row==5||col==1)
                    System.out.print("* "); 
                else
                    System.out.print("  "); 
        }
               System.out.println(); 
        }


    }
output:

*               * 
*               * 
*               * 
*               * 
* * * * * * * * * 
*               * 
*               * 
*               * 
*               * 


    private static void patternF() {
        for(int row = 1; row<=9; row++)
        {
            for(int col=1; col<=9; col++) {
                if(row==1|| row==5||col==1)
                    System.out.print("* "); 
                else
                    System.out.print("  "); 
        }
               System.out.println(); 
        }


    }
output:

* * * * * * * * * 
*                 
*                 
*                 
* * * * * * * * * 
*                 
*                 
*                 
*                 


    private static void patternL() {
        for(int row = 1; row<=9; row++)
        {
            for(int col=1; col<=9; col++) {
                if(row==9||col==1)
                    System.out.print("* "); 
                else
                    System.out.print("  "); 
        }
               System.out.println(); 
        }
    }
output:

*                 
*                 
*                 
*                 
*                 
*                 
*                 
*                 
* * * * * * * * * 


    private static void patternI() {
        for(int row = 1; row<=9; row++)
        {
            for(int col=1; col<=9; col++) {
                if(row==1||row==9||col==5)
                    System.out.print("* "); 
                else
                    System.out.print("  "); 
        }
               System.out.println(); 
        }
    }
output:

* * * * * * * * * 
        *         
        *         
        *         
        *         
        *         
        *         
        *         
* * * * * * * * * 





    private static void patternE() {
        for(int row = 1; row<=9; row++)
        {
            for(int col=1; col<=9; col++) {
                if(row==1||row==9||col==1)
                    System.out.print("* "); 
                else if(row==5)
                    System.out.print("* "); 
                else
                    System.out.print("  "); 
        }
               System.out.println(); 
        }
    }
    }
output:

* * * * * * * * * 
*                 
*                 
*                 
* * * * * * * * * 
*                 
*                 
*                 
* * * * * * * * * 
package B1;
public class Spattern2 {

    public static void main(String[] args) {
        //patternE();
        //patternI();
        //patternL();
        //patternF();
        //patternH();
        //patternM();(TBD)
        //patternK();
    }

    private static void patternK() {
        for(int row = 1; row<=9; row++)
        {
            for(int col=1; col<=9; col++) {
                if(row+col==6|| col==1)
                    System.out.print("* "); 
                else if(col==row-4)
                    System.out.print("* "); 
                else
                    System.out.print("  "); 
        }
               System.out.println(); 
        }


    }
output:

*       *         
*     *           
*   *             
* *               
*                 
* *               
*   *             
*     *           
*       * 

    private static void patternM() {
        for(int row = 1; row<=9; row++)
        {
            for(int col=1; col<=9; col++) {
                if(col==1||col==9-1)
                    System.out.print("* "); 
                else if(row==col&&col<=9/2||row+col==9-1&&col>=9/2)
                    System.out.print("* "); 
                else
                    System.out.print("  ");
        }
               System.out.println(); 
        }


    }
output:

*           * *   
* *       *   *   
*   *   *     *   
*     *       *   
*             *   
*             *   
*             *   
*             *   
*             *   


    private static void patternH() {
        for(int row = 1; row<=9; row++)
        {
            for(int col=1; col<=9; col++) {
                if(col==9|| row==5||col==1)
                    System.out.print("* "); 
                else
                    System.out.print("  "); 
        }
               System.out.println(); 
        }


    }
output:

*               * 
*               * 
*               * 
*               * 
* * * * * * * * * 
*               * 
*               * 
*               * 
*               * 


    private static void patternF() {
        for(int row = 1; row<=9; row++)
        {
            for(int col=1; col<=9; col++) {
                if(row==1|| row==5||col==1)
                    System.out.print("* "); 
                else
                    System.out.print("  "); 
        }
               System.out.println(); 
        }


    }
output:

* * * * * * * * * 
*                 
*                 
*                 
* * * * * * * * * 
*                 
*                 
*                 
*                 


    private static void patternL() {
        for(int row = 1; row<=9; row++)
        {
            for(int col=1; col<=9; col++) {
                if(row==9||col==1)
                    System.out.print("* "); 
                else
                    System.out.print("  "); 
        }
               System.out.println(); 
        }
    }
output:

*                 
*                 
*                 
*                 
*                 
*                 
*                 
*                 
* * * * * * * * * 


    private static void patternI() {
        for(int row = 1; row<=9; row++)
        {
            for(int col=1; col<=9; col++) {
                if(row==1||row==9||col==5)
                    System.out.print("* "); 
                else
                    System.out.print("  "); 
        }
               System.out.println(); 
        }
    }
output:

* * * * * * * * * 
        *         
        *         
        *         
        *         
        *         
        *         
        *         
* * * * * * * * * 





    private static void patternE() {
        for(int row = 1; row<=9; row++)
        {
            for(int col=1; col<=9; col++) {
                if(row==1||row==9||col==1)
                    System.out.print("* "); 
                else if(row==5)
                    System.out.print("* "); 
                else
                    System.out.print("  "); 
        }
               System.out.println(); 
        }
    }
    }
output:

* * * * * * * * * 
*                 
*                 
*                 
* * * * * * * * * 
*                 
*                 
*                 
* * * * * * * * *

Enter fullscreen mode Exit fullscreen mode

原文链接：Patterns:

展开阅读全文

文章版权声明 1、本网站名称：拾光赋
2、本站永久网址：https://www.blogs.ink
3、本网站的文章部分内容可能来源于网络，仅供大家学习与参考，如有侵权，请联系站长QQ：805375623进行删除处理。
4、本站一切资源不代表本站立场，并不代表本站赞同其观点和对其真实性负责。
5、本站一律禁止以任何方式发布或转载任何违法的相关信息，访客发现请向站长举报
6、本站资源大多存储在云盘，如发现链接失效，请联系我们我们会第一时间更新。

THE END

Java（EN）
# java # programming

Patterns:

请登录后发表评论