java se 8 programmer 1

lock requires all read locks to be freed, a deadlock occurs if there are two read lock views that acquire a write lock without releasing the read lock. Lock get Interrupt Both the read lock and the write lock support the acquisition lock during the outage. This is consistent with the exclusive lock. Condition variable The write lock provides support for the conditional variable (Condition), which is consistent with the exclusive lock, but the read lock do

1.import java.awt.flowlayout;import javax.swing.jbutton;import Javax.swing.jframe;import javax.swing.JLabel;import Javax.swing.jtextfield;public class Test {public static void main (string[] args) {//system.out.println ("hello,world!"); JFrame test= new JFrame (); Test.setlayout (new FlowLayout (flowlayout.center,3,3)); JLabel userid = new JLabel ("useri8d"); JTextField user1 = new JTextField ("user1", 30); JLabel PassWord = new JLabel ("PassWord"); J

[Java]/** Start the program header annotation.* Copyright and version Declaration of the program* Copyright (c) 2011, a student from the computer College of Yantai University* All rights reserved.* File name: inherited exercise* Author: Xue Guangchen* Completion date: January 1, October 17, 2012* Version No.: x1.0* Description of tasks and Solutions* Input description:* Problem description: (