摘要:
import java.sql.Connection;import java.sql.DriverManager;import java.sql.ResultSet;import java.sql.Statement;import java.util.Scanner;public class Stu... 阅读全文
摘要:
abstract class Animal{ int legs; public Animal(int legs){ this.legs=legs; } public Animal(){} public abstract void eat(... 阅读全文
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