Since Math is in the java.lang package, it does not need to be imported. java.lang is the "default package" and everything in it is already ... ... <看更多>

Full Java Course: https://course.alexlorenlee.com/courses/learn- java -fastIf you're new to programming, I HIGHLY RECOMMEND solving challenges ... ... <看更多>

math.*; import java.util.regex.*; public class Solution { public static void main(String[] args) { Scanner in = new Scanner(System ... ... <看更多>

import java.io.*; public class GuessGame { public static void main(String[] args) throws Exception { int answer = (int) (Math.random() * 10); ... ... <看更多>

Java language core classes. Object, String, System,. Integer, Double, Math. You never need to "import" classes in java.lang. Its automatic. java.io. Classes for ... ... <看更多>