Java综合案例的相关内容

Java 综合案例

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转型的异常转型的过程中，一不小心就会遇到这样的问题，请看如下代码：这段代码可以通过编译，但是运行时，却报出了 ClassCastException ，类型转换异常！这是因为，明明创建了Cat 类型对象，运行时，当然不能转换成 Dog 对象的。这两个类型并没有...

【Java】多态&综合案例（一）

1. 多态1.1 概述引入多态是继封装、继承之后，面向对象的第三大特性。生活中，比如跑的动作，小猫、小狗和大象，跑起来是不一样的。再比如飞的动作，昆虫、鸟类和飞机，飞起来也是不一样的。可见，同一行为，通过不同的事物，可以体现出来的不同的形态。多态，描述的就是...

【Java】抽象类&继承的综合案例

1. 抽象类1.1 概述由来父类中的方法，被它的子类们重写，子类各自的实现都不尽相同。那么父类的方法声明和方法主体，只有声明还有意义，而方法主体则没有存在的意义了。我们把没有方法主体的方法称为抽象方法。 Java 语法规定，包含抽象方法的类就是抽象类。定义抽象方法：没有方法体的...

Java学习路线-16：多线程综合案例

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Java继承的综合案例

继承的综合案例项目链接https://download.csdn.net/download/weixin_45525272/174160731.1 综合案例：群主发普通红包群主发普通红包。某群有多名成员，群主给成员发普通红包。普通红包的规则：群主的一笔金额，从群主余额中扣除，平均分成n等份，让成员领...

Java 基础部分的高级编程中的多线程综合案例，数字加减的多线程同步异常

当只有两个线程的时候，程序加减交替执行，运行正常，当有四个线程的时候，程序可能出现连加连减的情况。请帮忙看看问题出在哪里。详细代码如下： public class NumDemo { public static void main(String[] args) { Resource res = ne...

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