代码

public class ForCyclicSentence {

    public static void main(String[] args) {
        System.out.println("-- 1 --");
        for (int i = 0; i < 3; i++) {
            for (int j = 0; j < 4; j++) {
                System.out.print("*");
            }
            System.out.println();
        }

        System.out.println("\n-- 2 --");
        for (int i = 0; i < 5; i++) {
            for (int j = 0; j <= i; j++) {
                System.out.print("*");
            }
            System.out.println();
        }

        System.out.println("\n-- 3 --");
        for (int i = 5; i > 0; i--) {
            for (int j = 0; j < i; j++) {
                System.out.print("*");
            }
            System.out.println();
        }

        System.out.println("\n-- 4 --");
        for (int i = 5; i > 0; i--) {
            for (int j = 0; j < 5 - i; j++) {
                System.out.print(" ");
            }
            for (int j = 0; j < i; j++) {
                System.out.print("*");
            }
            System.out.println();
        }

        System.out.println("\n-- 5 --");
        for (int i = 0; i < 7; i += 2) {
            for (int j = 0; j < (7 - i) / 2; j++) {
                System.out.print(" ");
            }
            for (int j = 0; j <= i; j++) {
                System.out.print("*");
            }
            System.out.println();
        }

        System.out.println("\n-- 6 --");
        for (int i = 0; i < 7; i += 2) {
            for (int j = 0; j < (7 - i) / 2; j++) {
                System.out.print(" ");
            }
            for (int j = 0; j < i + 1; j++) {
                if (j == 0 || j == i || i == 6) {
                    System.out.print("*");
                } else {
                    System.out.print(" ");
                }
            }
            System.out.println();
        }

        System.out.println("\n-- 7 --");
        for (int i = 7; i > 0; i -= 2) {
            for (int j = 0; j < (7 - i) / 2; j++) {
                System.out.print(" ");
            }
            for (int j = 0; j < i; j++) {
                System.out.print("*");
            }
            System.out.println();
        }

        System.out.println("\n-- 8 --");
        for (int i = 7; i > 0; i -= 2) {
            for (int j = 0; j < (7 - i) / 2; j++) {
                System.out.print(" ");
            }
            for (int j = 0; j < i; j++) {
                if (j == 0 || j == i - 1 || i == 7) {
                    System.out.print("*");
                } else {
                    System.out.print(" ");
                }
            }
            System.out.println();
        }

        System.out.println("\n-- 乘法表1 --");
        for (int i = 1; i <= 9; i++) {
            for (int j = 1; j <= i; j++) {
                System.out.print(j + "*" + i + "=" + i * j + "\t");
            }
            System.out.println();
        }

        System.out.println("\n-- 乘法表2 --");
        for (int i = 1; i <= 9; i++) {
            for (int j = 1; j < i; j++) {
                System.out.print("\t\t");
            }
            for (int j = i; j <= 9; j++) {
                System.out.print(i + "*" + j + "=" + i * j + "\t");
            }
            System.out.println();
        }
    }
}

结果

-- 1 --
****
****
****

-- 2 --
*
**
***
****
*****

-- 3 --
*****
****
***
**
*

-- 4 --
*****
 ****
  ***
   **
    *

-- 5 --
   *
  ***
 *****
*******

-- 6 --
   *
  * *
 *   *
*******

-- 7 --
*******
 *****
  ***
   *

-- 8 --
*******
 *   *
  * *
   *

-- 乘法表1 --
1*1=1	
1*2=2	2*2=4	
1*3=3	2*3=6	3*3=9	
1*4=4	2*4=8	3*4=12	4*4=16	
1*5=5	2*5=10	3*5=15	4*5=20	5*5=25	
1*6=6	2*6=12	3*6=18	4*6=24	5*6=30	6*6=36	
1*7=7	2*7=14	3*7=21	4*7=28	5*7=35	6*7=42	7*7=49	
1*8=8	2*8=16	3*8=24	4*8=32	5*8=40	6*8=48	7*8=56	8*8=64	
1*9=9	2*9=18	3*9=27	4*9=36	5*9=45	6*9=54	7*9=63	8*9=72	9*9=81	

-- 乘法表2 --
1*1=1	1*2=2	1*3=3	1*4=4	1*5=5	1*6=6	1*7=7	1*8=8	1*9=9	
		2*2=4	2*3=6	2*4=8	2*5=10	2*6=12	2*7=14	2*8=16	2*9=18	
				3*3=9	3*4=12	3*5=15	3*6=18	3*7=21	3*8=24	3*9=27	
						4*4=16	4*5=20	4*6=24	4*7=28	4*8=32	4*9=36	
								5*5=25	5*6=30	5*7=35	5*8=40	5*9=45	
										6*6=36	6*7=42	6*8=48	6*9=54	
												7*7=49	7*8=56	7*9=63	
														8*8=64	8*9=72	
																9*9=81
分类: Java SE

Deng Jia

Keep Moving.

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