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                合規國際互聯網加速 OSASE為企業客戶提供高速穩定SD-WAN國際加速解決方案。 廣告
                ### Java并發編程基礎 ~~~ package com.stono.thread; import java.lang.management.ManagementFactory; import java.lang.management.ThreadInfo; import java.lang.management.ThreadMXBean; public class MultiThread { public static void main(String[] args) { // 獲取Java線程管理MXBean ThreadMXBean threadMXBean = ManagementFactory.getThreadMXBean(); // 不需要獲取同步的monitor和synchronizer的信息,僅獲取線程和線程堆棧信息 ThreadInfo[] dumpAllThreads = threadMXBean.dumpAllThreads(false, false); // 遍歷線程信息,僅打印線程ID和線程名稱信息 for (ThreadInfo threadInfo : dumpAllThreads) { System.out.println("["+threadInfo.getThreadId()+"]"+threadInfo.getThreadName()); } } } ~~~ Thread.yield()把優先權交給別的線程; Thread.setPriotiry(1-10, 默認5)設置線程優先級,但是操作系統不認; Thread.join(等待的毫秒數),等我多少毫秒,不設毫秒就一直等; Java線程的六種狀態:NEW, RUNNABLE, BLOCKED, WAITING(等待狀態,當前線程需要等待其他線程通知或者中斷), TIME_WAITING(超時等待,可以在指定時間自行返回), TERMINATED。 Java將操作系統中的運行和就緒兩個狀態合并稱為運行狀態。 中斷可以理解為一個標識位屬性,其他線程通過調用該線程的interrupt()方法對該線程進行中斷;isInterrupted()方法可以判斷自身是否被中斷過;但是,一個線程sleep中,被interrupt()之后,他的中斷標識就被jvm清除了; 等待/通知經典范式 ~~~ synchronized(object){   while(條件不滿足){     object.wait();   }   邏輯處理; } synchronized(object){   改變條件   object.notifyAll(); } ~~~ 管道輸入/輸出流主要包括4種實現:PipedOutputStream、PipedInputStream、PipedReader、PipedWriter,前兩種面向字節,后兩種面向字符;
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