黑马程序员_java基础自学经典程序记录

来源：互联网发布：蜂窝移动数据用量清零编辑：程序博客网时间：2024/06/04 21:00

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/*需求：简单的卖票程序。多个窗口卖票。创建线程的第二种方式：实现Runnable接口步骤：1，定义类事项Runnable接口2，覆盖Runnable接口中的run方法3，通过Thread类建立线程对象4，将Runnable接口的子类对象传递给Thread的构造函数5，调用Thread类的start方法开启线程并调用Runnable接口子类的run方法实现方式和继承方式区别：实现方式避免了单继承的局限性。继承Thread：线程代码存放Thread子类run方法中。实现Runnable，线程代码存在接口的子类run方法中。*/class Ticket implements Runnable// extends Thread {private int tick = 100;public void run(){while(true){if(tick>0){System.out.println(Thread.currentThread().getName()+"...sale:"+tick--);}}}}class ThreadDemo{public static void main(String[] args){Ticket t = new Ticket();Thread t1 = new Thread(t);Thread t2 = new Thread(t);Thread t3 = new Thread(t);Thread t4 = new Thread(t);t1.start();t2.start();t3.start();t4.start();}}/*答案：134 13423；考点：Exception执行顺序*/class Test {public static String output="";public static void foo(int i){try{if(i==1)throw new Exception();output+="1";}catch (Exception e){output+="2";return;}finally{output+="3";}output+="4";}public static void main (String args[]){foo(0);System.out.pringln(output);foo(1);System.out.println(output);}}

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