별찍기

static void showStar() {
    for (int j=1; j<=5; j++) {
        for (int i=4; i>=j; i--) {
            System.out.print(" ");
        }
  
        for (int i=1; i<=j; i++) {
            System.out.print("*");
        }
        System.out.println();
    }
}
  
  
    *
   **
  ***
 ****
*****

static void showStar() {

    for (int j=1; j<=5; j++) {
        for (int i=4; i>=j; i--) {
            System.out.print(" ");
        }
  
        for (int i=1; i<=(j*2)-1; i++) {
            System.out.print("*");
        }
        System.out.println();
    }
}
  
  
    *
   ***
  *****
 *******
*********

static void showStar() {

    for (int j=1; j<=5; j++) {
        for (int i=1; i<=5-j; i++) {
            System.out.print(" ");
        }
        for (int i=1; i<=(j*2)-1; i++) {
            System.out.print("*");
        }
        System.out.println();
    }
  
    for (int j=4; j>=1; j--) {
        for (int i=0; i<=4 - j; i++) {
            System.out.print(" ");
        }
        for (int i=1; i<=(j*2)-1; i++) {
            System.out.print("*");
        }
        System.out.println();
    }
}
  
  
    *
   ***
  *****
 *******
*********
 *******
  *****
   ***
    *

static void showStar() {

    for (int j=1; j<=5; j++) {
        for (int i=4; i>=j; i--) {
            System.out.print(" ");
        }
         
        if(j<5) {
            for (int i=1; i<=(j*2)-1; i++) {
                if(i==1 || i==(j*2)-1)
                    System.out.print("*");
                else
                    System.out.print(" ");
            }
        } else {
            for (int i=1; i<=(j*2)-1; i++) {
                System.out.print("*");
            }
        }
        System.out.println();
    }
}
  
  
    *
   * *
  *   *
 *     *
*********