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一JAVA题求解

class Animal { Animal type; void sound() { //detailed method } } class Dog extends Animal { void sound() { //detailed method } } class Cat extends Animal { void sound() { //detailed method } } public class AnimalDemo { public s...

第1个文件:Person.java public class Person{ private String name; private String sex; private String age; private String country; public void eat(){ System.out.println("Person吃饭"); } public void sleep(){ System.out.println("Pe...

完整代码如下,复制到eclipse中运行: public class StuExam {private String snum;// 学号private String cnum;// 班号private String name;// 姓名private char sex;// 性别private int age;// 年龄// get/set方法用来获取/设置学生实例对象的...

完整代码如下,复制到eclipse中运行: public class Cube {private double l1;// 长private double w1;// 宽private double h1;// 高// get/set方法用来获取/设置长方体实例对象的信息public double getL1() {return l1;}public void setL1(doub...

你是不是写错了? Object类没有equals()方法 只有equals(Object obj)方法。如果没写错的话 答案应该是D。 如果是 1. class A{ 2. protected boolean equals(Object ){ 3. return super.equals(obj);} 4. } 的话答案是C 出错理由是 子类 在重...

Scanner sc = new Scanner(System.in);System.out.print("输入路径:");String path = sc.next();File dir = new File(path);if (dir.isDirectory() && dir.exists()) {System.out.println("存在此路径,列出txt文件名");File[] txtFiles = dir....

import java.util.LinkedList; import java.util.List; public class Student { private int id; // 学号 private String name; // 姓名 private int age; // 年龄 private int sex; // 性别 0,女;1,男 List students = new LinkedList(); /*...

public class Account{ private int id; private String name; private String personId; private double balance; public void deposit(double mon){ balance += mon; } public void withdraw(double mon){ if(balance > 0 && balance > mon) b...

import java.util.Scanner; public class Demo{ public static void main(String[] args) { Scanner input = new Scanner(System.in); Square s = new Square(); System.out.println("请输入一个正方形的边长"); double d =input.nextDouble(); ...

int[] s={-1,5,-3,3,2,-8,6,5,-9,9,7}; //定义一个任意长度的原数组 int len=s.length; //获得原数组长度 int[] s1=new int[len]; //定义一个用于保存倒叙后的新数组,长度为原数组长度 for(int i=0;i

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