java4Android(15)处理流的使用示例、装饰者设计模式、节点流和处理流的关系

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BufferedReader使用方法

import java.io.*;class test{    public static void  main(String args[])    {        FileReader fileReader = null;        BufferedReader br = null;        try        {            fileReader = new FileReader("D:/BaiduYunDownload/Java4Android/lx_1/from.txt");            br = new BufferedReader(fileReader);            String line = null;            while(true)            {                line = br.readLine();                if(br.readLine() == null)                {                    break;                }                System.out.println(line);            }        }        catch(Exception e)        {            System.out.println(e);        }        finally        {            //fileReader.close();            //br.close();        }    }}

装饰者模式实例：

class test{    public static void main(String[] args)    {        //目标 要一个A公司的水管工        //水管工        Plumber p = new Plumber();        //A公司        AWorker aworker = new AWorker(p);        aworker.doSomeThing();        //木工        //Carpenter c = new Carpenter();        //AWorker a = new AWorker(c);        //a.doSomeThing();    }}interface Worker{    public void doSomeThing();}class Plumber implements Worker{    public void doSomeThing()    {        System.out.println("水管工修水管");    }}class Carpenter implements Worker{    public void doSomeThing()    {        System.out.println("木匠做门窗");    }}class AWorker implements Worker{    //重点    private Worker mWorker;    AWorker(Worker worker)    {        this.mWorker = worker;    }    public void doSomeThing()    {        System.out.println("a company say ni hao");        mWorker.doSomeThing();    }}

结果：

a company say ni hao水管工修水管

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