system.out

I generated two matrices of 1000 x 1000 : First Matrix: O and # . Second Matrix: O and B . Using the following code, the first matrix took 8.52 seconds to complete: Random r = new Random(); for (int i = 0; i < 1000; i++) { for (int j = 0; j < 1000; j++) { if(r.nextInt(4) == 0) { System.out.print("O"); } else { System.out.print("#"); } } System.out.println(""); } With this code, the second matrix took 259.152 seconds to complete: Random r = new Random(); for (int i = 0; i < 1000; i++) { for (int j = 0; j < 1000; j++) { if(r.nextInt(4) == 0) { System.out.print("O"); } else { System.out.print("B"

I'm trying to understand the difference, and benefits of using System.out.println() vs. return blah in a method. It seems like System.out.println() is used to display static information, and return is a value returned from the method. Yet I'm seeing examples like the one below, where a function is used within the System.out.println() statement System.out.println(name.substring(1, 3)); When is it right to use System.out.println() and return . Is it that return can be used by another piece of code later, whereas System.out.println() cannot? Your last sentence is effectively correct, but the

I have worked with Java for a quite a long time, and I was wondering how the function System.out.print() works. Here is my doubt: Being a function, it has a declaration somewhere in the io package. But how did Java developers do that, since this function can take in any number of arguments and any argument types no matter how they are arranged? e.g: System.out.print("Hello World"); System.out.print("My name is" + foo); System.out.print("Sum of " + a + "and " + b + "is " + c); System.out.print("Total USD is " + usd); No matter what is the datatype of variables a, b, c, usd, foo or how they are