pattern related programs in java

Simple triangle star pattern

1)
Enter a number : 4

    *
    * *
    * * *
    * * * *

import java.util.Scanner;

public class Pattern1 {

 public static void main(String[] args) {
  Scanner scanner = new Scanner(System.in);
  System.out.println("Enter a number :");
  int n = scanner.nextInt();
  for (int i = 1; i <= n; i++) {
   for (int j = 1; j <= i; j++) {
    System.out.print("*");
   }
   System.out.println();
  }  
 } 
}

2)
Enter a number : 4

* * * *
* * *
* *
* 

import java.util.Scanner;

public class Pattern2 {
 public static void main(String[] args) {
  Scanner scanner = new Scanner(System.in);
  System.out.println("Enter a number :");
  int n = scanner.nextInt();
  for (int i = n; i > 0; i--) {
   for (int j = 0; j < i; j++) {
    System.out.print("*");
   }
   System.out.println();
  }
 }
}

3)
Enter a number :4

           *
        * *
     * * *
  * * * *

import java.util.Scanner;

public class Pattern3 {
 public static void main(String[] args) {
  Scanner scanner = new Scanner(System.in);
  System.out.println("Enter a number :");
  int n = scanner.nextInt();
  for (int i = 1; i < n; i++) {
   for (int k = n - 1; k > i; k--) {
    System.out.print(" ");
   }
   for (int j = 0; j < i; j++) {
    System.out.print("*");
   }
   System.out.println();
  }
 }
}

4)
Enter a number : 4

* * * *
   * * *
      * *
         *

import java.util.Scanner;

public class Pattern4 {
 public static void main(String[] args) {
  Scanner scanner = new Scanner(System.in);
  System.out.println("Enter a number :");
  int n = scanner.nextInt();
  for (int i = n; i > 0; i--) {
   for (int k = n; k > i; k--) {
    System.out.print(" ");
   }
   for (int j = 0; j < i; j++) {
    System.out.print("*");
   }
   System.out.println();
  }
 }
}

5)
Enter a number : 5

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

import java.util.Scanner;

public class Pattern5 {
 public static void main(String[] args) {
  Scanner scanner = new Scanner(System.in);
  System.out.println("Enter a number :");
  int n = scanner.nextInt();
  for (int i = 1; i <= n; i++) {
   for (int j = n; j >= i; j--) {
    System.out.print(" ");
   }
   for (int k = 1; k <= (2 * i - 1); k++) {
    System.out.print("*");
   }
   System.out.println("");
  }
 }
}