threads in java interview questions and answers

we don't want to repeat, we should use set. (2) Some collection classes allow the initial capacity to be specified, so if we can estimate the number of storage elements, we could use it to avoid a hash or resize. (3) Based on interface programming, rather than on implementation programming, it allows us to easily change implementations later. (4) Always use type-safe generics to avoid classcastexception at run time. (5) using the immutable class provided by JDK as the key of the map, you ca

1. On multicore hardware, can multiple threads of the same process in Java run on different CPUs?It should be possible to run a simulation program on Eclipse, a dead loop thread can occupy the system (4 cores, Win7) andthe cpu,4 of such a thread just occupies 100%. This can be explained from the side that threads can be assigned to different cores. Of course, a s

Java.lang.Runnable interface to execute, since the thread class itself is the runnable interface of the call so you can inherit the Java.lang.Thread classor call the Runnable interface directly to override the run () method to implement the thread.With runnable or thread?The question is the follow-up, and we all know that we can implement threads by inheriting the thread class or calling the Runnable interface, and the question is, what better way? U

()//Line Cheng Zi class {public void Run () {for (int i = 0;iMulti-threaded interview questions:1.Class Text implements Runnable{public void Run (Thread t) {}}//failed to compile? What if the failure error?failed with overwrite of Run method not implementedChange Law One:Abstract class Text implements Runnable{public void Run (Thread t) {}}Change method Two: overload, coverClass Text implements Runnable{public void Run () {System.out.println ("Text.r

Class ManyThreads2 {private int j = 0;Public synchronized Void Inc () {j + +;System.out.println (Thread.CurrentThread (). GetName () + "Inc" + j); }public synchronized void Dec () {j--;System.out.println (Thread.CurrentThread (). GetName () + "Dec" + j);}}public class MyTest extends Thread {Private MANYTHREADS2 many = new ManyThreads2 ();public void Run (){many.inc ();Many.dec ();Many.inc ();Many.dec ();}public static void Main (string[] args) {TODO auto-generated Method StubMyTest MyTest = new