System.out.print() not working but System.out.println() working

When I try to print on the console using System.out.print() the content in the parameter doesn’t get printed. But if I try System.out.println() it works.

I’m using TMCBeans as the IDE.

Code:

import java.nio.file.Paths;
import java.util.Scanner;
import java.util.ArrayList;

public class TextUI {

    private Scanner tscanner;
    private RecipeManager rm;

    public TextUI(RecipeManager rm, Scanner tscanner) {
        this.rm = rm;
        this.tscanner = tscanner;
    }

    public void start() {
        System.out.print("File to read: ");
        String file = tscanner.nextLine();
        try (Scanner fscanner = new Scanner(Paths.get(file))) {
            while (fscanner.hasNextLine()) {
                String name = fscanner.nextLine();
                int time = Integer.valueOf(fscanner.nextLine());
                ArrayList<String> ingredients = new ArrayList<>();
                String ing = fscanner.nextLine();
                while (!(ing.isEmpty())) {
                    ingredients.add(ing);
                    ing = fscanner.nextLine();
                }
                rm.add(new Recipe(name, time, ingredients));
            }
        } catch (Exception e) {
            System.out.println(e);
        }
        while (true) {
            System.out.println("Commands:\n"
                    + "list - lists the recipes\n"
                    + "stop - stops the program\n"
                    + "\n"
                    + "Enter command: ");

            String command = tscanner.nextLine();
            if (command.equals("list")) {
                rm.listRecipes();
            } else if (command.equals("stop")) {
                return;
            }
        }

    }
}

To run this, you create an instance of this class and run the start() method passing an instance of another class(RecipeManager which is irrelevant to the question I reckon) and a Scanner instance with parameters as System.in

With System.out.print("File to read: "):

With System.out.println("File to read: "):

System.out.print() not displaying anything whereas System.out.println() does.

>Solution :

This is your IDE’s fault, presumably also because it was written in java :^).

When you read a process stream (like the IDE is doing, the output stream of the running program), java caches the current line until a line separator is hit. In your case, because you aren’t printing a line sep, the IDE won’t show the line until one appears. Try print("something\n"), and it will most likely show up.