Run more than one code?

[Chase Harris]

So I have a question I'm trying to solve. I am supposed to display four patterns using loops. I have the coding for each pattern, but is there a way to have them all in the same .java file? Here's my code:

import java.util.Scanner;

public class Assignment2Question3 {

public static void main(String[] args) {
  System.out.print("Enter the number of lines:");
  Scanner input = new Scanner(System.in);

  // get the total number of lines n.
  int n = input.nextInt();

  // Loop through the lines from 1 to n
  System.out.println("Pattern A");
  for (int i = 1; i <= n; i++) {

   // Printing number increamentally from 1 to line number j
   for (int j = 1; j <= i; j++) {
    System.out.print(j + " ");
   }
   System.out.println();

  }

 }


public static void main2(String[] args) {
  System.out.print("Enter the number of lines:");
  Scanner input = new Scanner(System.in);

  // get the total number of lines n.
  int n = input.nextInt();

  // Loop through the lines from 1 to n (i=0 to n-1
  System.out.println("Pattern B");
  for (int i = 0; i < n; i++) {



   // Printing number increamentally from 1 to line number j
   for (int j = 1; j <= n - i; j++) {
    System.out.print(j + " ");
   }
   System.out.println();

 }

}

public static void main3(String[] args) {
  System.out.print("Enter the number of lines:");
  Scanner input = new Scanner(System.in);
  
  //get the total number of lines n.
  int n = input.nextInt();

  //Loop through the lines from 1 to n
  System.out.println("Pattern C");
  for (int i = 1; i <= n; i++) {
   // printing spaces, 2 at a time from j=1 to j= n-i 
   for (int j = 1; j <= (n - i); j++) {
    System.out.print("  ");
   }
   
   //Printing number increamentally from 1 to line number j
   for (int j = 1; j <= i; j++) {
    System.out.print(j + " ");
   }
   System.out.println();


  }

 }

public static void main4(String[] args) {
  System.out.print("Enter the number of lines:");
  Scanner input = new Scanner(System.in);
  
  //get the total number of lines n.
  int n = input.nextInt();
  
  //Loop through the lines from 1 to n (i=0 to n-1)
  System.out.println("Pattern C");
  for (int i = 0; i < n; i++) {
   
   // printing spaces, 2 at a time from j=i to 0
   for (int j = i; j>0; j--) {
    System.out.print("  ");
   }
   
   //Printing number increamentally from 1 to line number j
   for (int j = 1; j <= n-i; j++) {
    System.out.print(j + " ");
   }
   System.out.println();

  }

 }

}

When I run, I can only do the output for the first pattern. I just don't know how to go about combining them. Is there a way to do all of them without separating each into their own file/project? Thanks.

[Jeanne Boyarsky]

You can only have one main method. However, that method can call other methods.

[Chase Harris]

Jeanne Boyarsky wrote:You can only have one main method. However, that method can call other methods.

Do you have an example? My book doesn't talk about this.

[Henry Wong]

Chase Harris wrote:Do you have an example? My book doesn't talk about this.

Did you get to the section regarding creating methods yet? If not, here is the section from the Oracle tutorial... https://docs.oracle.com/javase/tutorial/java/javaOO/methods.html

Henry

[Campbell Ritchie]

Why have you marked everything static? Using the keyword static without a good explanation is a mistake. “Because it wouldn't compile otherwise,” is not a good explanation.

[T Tak]

May be this is what you are looking for

package my.test;

import java.util.Scanner;

public class Assignment2Question3 {

	public static void main(String[] args) {
		throw new IfCampbellSeesThisHeWillDeleteItException()
    }

	public  void patternD() {
		System.out.print("Enter the number of lines:");
		Scanner input = new Scanner(System.in);
        throw new IfCampbellSeesThisHeWillLaughYouToScornException();
		input.close();
	}

}

[Campbell Ritchie]

Please read this, which is on the contents page of this forum:-

We're all here to learn, so when responding to others, please focus on helping them discover their own solutions, instead of simply providing answers.

By providing a complete solution you are depriving the OP of the opportunity to learn from this experience; also if this is assessed work there is a risk OP will be accused of plagiarism and get a mark of 0.
Please don't get annoyed, but I have pulled rank and deleted the solution, except one part which regular readers will doubtless see in a few seconds will fail to “work”.

[T Tak]

got the point.. is useful for future posts

[Campbell Ritchie]

Thank you