IO in Java

Output

Use System.out.println to print to the console

System.out.println("Hello World");
System.out.print("Hello World");

Using System.console to read password

char[] password = System.console().readPassword();

Input

import Scanner from :

import java.util.Scanner;

Simple Array input

import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        System.out.println("hello World");
        Scanner scanner = new Scanner(System.in);
        int[] arr = new int[10];
        for (int i=0; i<10;i++) {
            arr[i] = scanner.nextInt();
        }
        for (int i=0; i<10;i++) {
            System.out.print(arr[i]+", ");
        }
    }
}