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What is the use of ... (triple dot operator)

for Example please explain below code :

public PausableThreadPoolExecutor(...) { super(...); }

From which JDK version it was introduced.. ?

I want to know the exact use of following two :

static synchronized(lock){ // (if lock is static and if lock is non-static)
// Accessing some objects (static only as here non-static data will not...

Thanks. It was very good and in depth discussion.

I really appreciate the views given by you that make my concept more clear.

Thanks a lot :o

I agree that == should never be used for comparing two objects.

For this particular case or in any case == should never be used.

But I want to know what is the best way to create String...

Thanks you so much, for such a clear and logical explanation.

String s1 = new String("TEST");
String s2 = new String("TEST");

In this case two Objects are created, with pointing to same string...

I want to know the exact use of following two :

static synchronized(lock){ // (if lock is static and if lock is non-static)
// Accessing some objects (static only as here non-static data will...

I agree that we shall never use == operator to compare two objects.

Can you please explain little more about what you said about Compiler optimization in case of my code. Also will the String...

Yes.. Because I have tested this using above code.

Please run following code and decide :

public class StringMatch {

public static void main(String[] args) {
String s1 = "TRUE";
String s2 = "TRUE";
if(s1 == s2){...

I want to know the exact use of following two :

static synchronized(lock){ // (if lock is static and if lock is non-static)
// Accessing some objects (static only as here non-static data will...

String1 and String2 both are reffering same data in String pool.

So String1 == String2 will be TRUE (As both variables referring same data)

And String1.equals(String2) will be TRUE (As both...