Why Isn’t the Swing Toolkit Multithread-Safe? After Swing components have been displayed on the screen, they should only be operated on by the event-handling thread. The event-handling thread (or just event thread) is started automatically by the
Using a Worker Thread to Relieve the Event Thread使用背景工作執行緒來做事務操作/* * Created on 2005-7-17 * * Java Thread Programming - Paul Hyde * Copyright ? 1999 Sams Publishing * Jonathan Q. Bo 學習筆記 * */package org.tju.msnrl.jonathan.thread.chapter9; import
Missed Notification A missed notification occurs when threadB tries to notify threadA, but threadA is not yet waiting for the notification. In a multithreaded environment like Java, you don’t have much control over which thread runs and for how long.
CubbyHole Example The class CubbyHole (see Listing 8.9) simulates a cubbyhole. A cubbyhole is a slot that can have only one item in it at a time. One thread puts an item into the slot and another thread takes it out. If a thread tries to put an
Thread.currentThread() public static native Thread currentThread()to determine which thread is executing a segment of code Many of the methods in Thread are listed with some of the following modifiers: native, final, static, and synchronized. As a
為了深入瞭解Java的ClassLoader機制,我們先來做以下實驗:package java.lang;public class Test { public static void main(String[] args) { char[] c = "1234567890".toCharArray(); String s = new String(0, 10, c); }}String類有一個Package許可權的建構函式String(int
java中的數組與集合的排序兩種需要排序的對象:數組和集合1、集合java.util.Collections類提供了排序方法sort();static voidsort(List list) Sorts the specified list into ascending order, according to the natural ordering of its elements.static voidsort(List list, Comparator c)
軟體環境: 1、作業系統:Windows 2000 Server2、數 據 庫:Oracle 8i R2 (8.1.7) for NT 企業版3、安裝路徑:C:/ORACLE實現方法:1、 建立一個檔案為TEST.java public class TEST { public static void main (String args[]) { System.out.println("