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| 1 | - # 博客目录 | ||
| 1 | + # 博客 | ||
| 2 | + | ||
| 3 | + 如果你只是单纯要阅读的话,建议移步CSDN或者oschina上观看,访问速度快很多: | ||
| 4 | + | ||
| 5 | + >* CSDN:[我的java&javaweb学习笔记(汇总)](http://blog.csdn.net/h3243212/article/details/50659471) | ||
| 6 | + >* oschina:[我的java&javaweb学习笔记(汇总)](http://my.oschina.net/brianway/blog/614355) | ||
| 7 | + | ||
| 8 | + | ||
| 9 | + # 目录 | ||
| 2 | 10 | ||
| 3 | 11 | - [javase](/blogs/javase) | |
| 4 | 12 | - [java基础巩固笔记(1)-反射.md](/blogs/javase/java基础巩固笔记(1)-反射.md) | |
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| 1 | + package com.brianway.learning.java.base; | ||
| 2 | + | ||
| 3 | + /** | ||
| 4 | + * Created by Brian on 2016/4/14. | ||
| 5 | + */ | ||
| 6 | + | ||
| 7 | + /** | ||
| 8 | + * 待理解。 | ||
| 9 | + * 应该是考装箱和拆箱 | ||
| 10 | + */ | ||
| 11 | + public class Boxing { | ||
| 12 | + public static void main(String[] args) { | ||
| 13 | + Integer a = 1; | ||
| 14 | + Integer b = 2; | ||
| 15 | + Integer c = 3; | ||
| 16 | + Integer d = 3; | ||
| 17 | + Integer e = 321; | ||
| 18 | + Integer f = 321; | ||
| 19 | + Long g = 3L; | ||
| 20 | + System.out.println(c == d); | ||
| 21 | + System.out.println(e == f); | ||
| 22 | + System.out.println(c == (a + b)); | ||
| 23 | + System.out.println(c.equals(a + b)); | ||
| 24 | + System.out.println(g == (a + b)); | ||
| 25 | + System.out.println(g.equals(a + b)); | ||
| 26 | + | ||
| 27 | + } | ||
| 28 | + } | ||
| 29 | + | ||
| 30 | + /* | ||
| 31 | + 输出: | ||
| 32 | + true | ||
| 33 | + false | ||
| 34 | + true | ||
| 35 | + true | ||
| 36 | + true | ||
| 37 | + false | ||
| 38 | + */ | ||
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| 1 | + package com.brianway.learning.java.base.constructor; | ||
| 2 | + | ||
| 3 | + /** | ||
| 4 | + * Created by Brian on 2016/4/14. | ||
| 5 | + */ | ||
| 6 | + public class FatherClass { | ||
| 7 | + private String name; | ||
| 8 | + | ||
| 9 | + public FatherClass(){ | ||
| 10 | + System.out.println("执行了父类的无参构造方法"); | ||
| 11 | + } | ||
| 12 | + | ||
| 13 | + public FatherClass(String name) { | ||
| 14 | + this.name = name; | ||
| 15 | + System.out.println("执行了父类的构造方法FatherClass(String name)"); | ||
| 16 | + } | ||
| 17 | + } | ||
| Original file line number | Diff line number | Diff line change | |
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| 1 | + package com.brianway.learning.java.base.constructor; | ||
| 2 | + | ||
| 3 | + /** | ||
| 4 | + * Created by Brian on 2016/4/14. | ||
| 5 | + */ | ||
| 6 | + | ||
| 7 | + /** | ||
| 8 | + * 构造方法调用问题 | ||
| 9 | + * 子类构造方法会首先默认调用父类的无参构造方法,无论是否显式写了super(); | ||
| 10 | + */ | ||
| 11 | + public class SonClass extends FatherClass{ | ||
| 12 | + public SonClass(String name) { | ||
| 13 | + //super(name); | ||
| 14 | + System.out.println("执行了子类的构造方法SonClass(String name)"); | ||
| 15 | + } | ||
| 16 | + | ||
| 17 | + public SonClass() { | ||
| 18 | + System.out.println("执行了子类的无参构造方法"); | ||
| 19 | + } | ||
| 20 | + | ||
| 21 | + public static void main(String[] args) { | ||
| 22 | + new SonClass("aaa"); | ||
| 23 | + new SonClass(); | ||
| 24 | + } | ||
| 25 | + | ||
| 26 | + } | ||
| 27 | + | ||
| 28 | + /* | ||
| 29 | + 执行了父类的无参构造方法 | ||
| 30 | + 执行了子类的构造方法SonClass(String name) | ||
| 31 | + 执行了父类的无参构造方法 | ||
| 32 | + 执行了子类的无参构造方法 | ||
| 33 | + */ | ||
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| 1 | + package com.brianway.learning.java.multithread.communication.example12; | ||
| 2 | + | ||
| 3 | + import java.io.IOException; | ||
| 4 | + import java.io.PipedInputStream; | ||
| 5 | + | ||
| 6 | + /** | ||
| 7 | + * Created by Brian on 2016/4/14. | ||
| 8 | + */ | ||
| 9 | + public class ReadData { | ||
| 10 | + public void readMethod(PipedInputStream input){ | ||
| 11 | + try { | ||
| 12 | + System.out.println("read :"); | ||
| 13 | + byte[]bytes = new byte[20]; | ||
| 14 | + int readLength = input.read(bytes); | ||
| 15 | + while (readLength!=-1){ | ||
| 16 | + String newData = new String(bytes,0,readLength); | ||
| 17 | + System.out.print(newData); | ||
| 18 | + readLength = input.read(bytes); | ||
| 19 | + } | ||
| 20 | + } catch (IOException e) { | ||
| 21 | + e.printStackTrace(); | ||
| 22 | + } | ||
| 23 | + } | ||
| 24 | + } | ||
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| 1 | + package com.brianway.learning.java.multithread.communication.example12; | ||
| 2 | + | ||
| 3 | + import java.io.IOException; | ||
| 4 | + import java.io.PipedInputStream; | ||
| 5 | + import java.io.PipedOutputStream; | ||
| 6 | + | ||
| 7 | + /** | ||
| 8 | + * Created by Brian on 2016/4/14. | ||
| 9 | + */ | ||
| 10 | + | ||
| 11 | + /** | ||
| 12 | + * P173 | ||
| 13 | + * 通过管道进行线程间通信:字节流 | ||
| 14 | + * | ||
| 15 | + * 字符流PipedWriter,PipedReader,同理。 | ||
| 16 | + */ | ||
| 17 | + public class Run12_pipeInputOutput { | ||
| 18 | + public static void main(String[] args) { | ||
| 19 | + try { | ||
| 20 | + WriteData writeData = new WriteData(); | ||
| 21 | + ReadData readData = new ReadData(); | ||
| 22 | + | ||
| 23 | + PipedInputStream inputStream = new PipedInputStream(); | ||
| 24 | + PipedOutputStream outputStream = new PipedOutputStream(); | ||
| 25 | + | ||
| 26 | + //inputStream.connect(outputStream); | ||
| 27 | + outputStream.connect(inputStream); | ||
| 28 | + | ||
| 29 | + ThreadRead threadRead = new ThreadRead(readData,inputStream); | ||
| 30 | + threadRead.start(); | ||
| 31 | + | ||
| 32 | + Thread.sleep(2000); | ||
| 33 | + | ||
| 34 | + ThreadWrite threadWrite = new ThreadWrite(writeData,outputStream); | ||
| 35 | + threadWrite.start(); | ||
| 36 | + | ||
| 37 | + } catch (IOException e) { | ||
| 38 | + e.printStackTrace(); | ||
| 39 | + }catch (InterruptedException e){ | ||
| 40 | + e.printStackTrace(); | ||
| 41 | + } | ||
| 42 | + } | ||
| 43 | + } | ||
| 44 | + | ||
| 45 | + | ||
| 46 | + /* | ||
| 47 | + 输出: | ||
| 48 | + read : | ||
| 49 | + write : | ||
| 50 | + 123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206207208209210211212213214215216217218219220221222223224225226227228229230231232233234235236237238239240241242243244245246247248249250251252253254255256257258259260261262263264265266267268269270271272273274275276277278279280281282283284285286287288289290291292293294295296297298299300 | ||
| 51 | + 123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206207208209210211212213214215216217218219220221222223224225226227228229230231232233234235236237238239240241242243244245246247248249250251252253254255256257258259260261262263264265266267268269270271272273274275276277278279280281282283284285286287288289290291292293294295296297298299300 | ||
| 52 | + | ||
| 53 | + -------------- | ||
| 54 | + 取消注释//inputStream.connect(outputStream); | ||
| 55 | + 输出: | ||
| 56 | + java.io.IOException: Already connected | ||
| 57 | + at java.io.PipedOutputStream.connect(PipedOutputStream.java:100) | ||
| 58 | + at com.brianway.learning.java.multithread.communication.example12.Run12_pipeInputOutput.main(Run12_pipeInputOutput.java:25) | ||
| 59 | + at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method) | ||
| 60 | + at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62) | ||
| 61 | + at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43) | ||
| 62 | + at java.lang.reflect.Method.invoke(Method.java:483) | ||
| 63 | + at com.intellij.rt.execution.application.AppMain.main(AppMain.java:144) | ||
| 64 | + | ||
| 65 | + | ||
| 66 | + */ | ||
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| 1 | + package com.brianway.learning.java.multithread.communication.example12; | ||
| 2 | + | ||
| 3 | + import java.io.PipedInputStream; | ||
| 4 | + | ||
| 5 | + /** | ||
| 6 | + * Created by Brian on 2016/4/14. | ||
| 7 | + */ | ||
| 8 | + public class ThreadRead extends Thread { | ||
| 9 | + private ReadData read; | ||
| 10 | + private PipedInputStream input; | ||
| 11 | + | ||
| 12 | + public ThreadRead(ReadData read,PipedInputStream input) { | ||
| 13 | + super(); | ||
| 14 | + this.input = input; | ||
| 15 | + this.read = read; | ||
| 16 | + } | ||
| 17 | + | ||
| 18 | + @Override | ||
| 19 | + public void run() { | ||
| 20 | + read.readMethod(input); | ||
| 21 | + } | ||
| 22 | + } | ||
| Original file line number | Diff line number | Diff line change | |
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| 1 | + package com.brianway.learning.java.multithread.communication.example12; | ||
| 2 | + | ||
| 3 | + import java.io.PipedOutputStream; | ||
| 4 | + | ||
| 5 | + /** | ||
| 6 | + * Created by Brian on 2016/4/14. | ||
| 7 | + */ | ||
| 8 | + public class ThreadWrite extends Thread{ | ||
| 9 | + private WriteData write; | ||
| 10 | + private PipedOutputStream out; | ||
| 11 | + | ||
| 12 | + public ThreadWrite(WriteData write, PipedOutputStream out) { | ||
| 13 | + super(); | ||
| 14 | + this.write = write; | ||
| 15 | + this.out = out; | ||
| 16 | + } | ||
| 17 | + | ||
| 18 | + @Override | ||
| 19 | + public void run() { | ||
| 20 | + write.writeMethod(out); | ||
| 21 | + } | ||
| 22 | + } | ||
| Original file line number | Diff line number | Diff line change | |
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| 1 | + package com.brianway.learning.java.multithread.communication.example12; | ||
| 2 | + | ||
| 3 | + import java.io.IOException; | ||
| 4 | + import java.io.PipedOutputStream; | ||
| 5 | + | ||
| 6 | + /** | ||
| 7 | + * Created by Brian on 2016/4/14. | ||
| 8 | + */ | ||
| 9 | + public class WriteData { | ||
| 10 | + public void writeMethod(PipedOutputStream out){ | ||
| 11 | + try { | ||
| 12 | + System.out.println("write :"); | ||
| 13 | + for(int i=0;i<300;i++){ | ||
| 14 | + String outData = "" + (i+1); | ||
| 15 | + out.write(outData.getBytes()); | ||
| 16 | + System.out.print(outData); | ||
| 17 | + } | ||
| 18 | + System.out.println(); | ||
| 19 | + out.close(); | ||
| 20 | + } catch (IOException e) { | ||
| 21 | + e.printStackTrace(); | ||
| 22 | + } | ||
| 23 | + | ||
| 24 | + } | ||
| 25 | + } | ||
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| 1 | + package com.brianway.learning.java.multithread.communication.example13; | ||
| 2 | + | ||
| 3 | + /** | ||
| 4 | + * Created by Brian on 2016/4/14. | ||
| 5 | + */ | ||
| 6 | + public class BackupA extends Thread { | ||
| 7 | + private DBTools dbTools; | ||
| 8 | + | ||
| 9 | + public BackupA(DBTools dbTools) { | ||
| 10 | + super(); | ||
| 11 | + this.dbTools = dbTools; | ||
| 12 | + } | ||
| 13 | + | ||
| 14 | + @Override | ||
| 15 | + public void run() { | ||
| 16 | + dbTools.backupA(); | ||
| 17 | + } | ||
| 18 | + } | ||
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