How to print out executable code in Java, without executing it?

Question

I want to create a library in Java, so whenever I need to refresh my memory on a certain topic, I can access it immediately just by inputting a certain number. However, once I put the pieces of code into System.out.println(), it takes it as a part of the code and starts spitting out errors. I just need a way to block the execution of a particular part of a code, while still being able to print it. How do I do this?

Code:

import java.util.Scanner;

class MyClass {
public static void main(String[ ] args) {

int onedotone = 1;

Scanner userinput = new Scanner(System.in);
int input = 0;
input = userinput.nextInt();

if (input == 1) {
System.out.println("Overview");
}

if (input == 1.1) {
System.out.println(class MyClass { //Here is the problem
public static void main(String[ ] args) {
System.out.println("Hello World");
}
}
);
}

else {
System.out.println("Not Found");
}

}
}

Answer 1

I would perhaps use files (at least in Python) to read from.
you could also do links to a blog you’ll write

and can’t you use a lot of \ escapes?

no expert btw