2020年

英文: Trying to find the diameter of a binary tree, but I don't know why I'm failing one parti...

英文: Java: Only Print Unique Characters in a String 问题 我正在编写一个程序，用于显示用户通过Scanner输入的字符串中的唯一字符。 例如，如果用户...

英文: Create a method that with 2 given arrays returns a new one with elements from a and b with no du...

英文: trying to find a recursive method which returns a string between two parenthesis 问题 public stati...

英文: How to check the lenght of an array of strings? I don't want to use lenght() because I need ...

英文: Why isn't my variable being resolved in Java? 问题 我在Eclipse Java中遇到了一个错误。我的代码是： ```Java if (a...

英文: (Java) Variable names must match pattern? 问题 import java.util.Scanner; public class ComparingNum...

英文: SQLite query for ordering a list based on mistakes made 问题 以下是翻译好的内容： 我想知道如何根据服务员所犯错误的数量查询数据库。 我...

英文: Flutter doctor --android-licenses problem 问题 希望你们都过得好。 我尝试在Flutter控制台中运行这个命令： flutter doctor --a...

英文: Binary search does not work. Wrong "first" and "last" 问题 public class Progra...