package com.hw; import java.util.ArrayList; import java.util.List; // Press Shift twice to open the Search Everywhere dialog and type `show whitespaces`, // then press Enter. You can now see whitespace characters in your code. public class Main { public static void main(String[] args) { // Press Alt+Enter with your caret at the highlighted text to see how // IntelliJ IDEA suggests fixing it. System.out.printf("Hello and welcome!"); // Press Shift+F10 or click the green arrow button in the gutter to run the code. for (int i = 1; i <= 5; i++) { // Press Shift+F9 to start debugging your code. We have set one breakpoint // for you, but you can always add more by pressing Ctrl+F8. System.out.println("i = " + i); } List dd = new ArrayList(); StringBuilder builder = new StringBuilder(); builder.append(1L); builder.append(","); builder.append(2L); dd.add(1L); dd.add(2L); Long[] dd1 = new Long[2]; dd1[0] = 1L; dd1[1] = 2L; System.out.println(builder.toString()); } }