Reassign standard Output Stream.

[dmjpro]

Today I came across a thing, is it possible to change the Standard Output Stream?
Then I immediately went for assign the System.out variable.

[code=java]
System.out = new PrintStream(new File("some_file _name"));
[/code]

Then I got a message, the final variable not to be updated.

Then I came to know that I have to take help from API,
[code=java]System.setOut(n ew PrintStream(new File("")))[/code]

So how Java updates the System.out as it's final.
Please help me to know it.

Kind regards,
Dmjpro.

[r035198x]

Today I came across a thing, is it possible to change the Standard Output Stream?
Then I immediately went for assign the System.out variable.

[code=java]
System.out = new PrintStream(new File("some_file _name"));
[/code]

Then I got a message, the final variable not to be updated.

Then I came to know that I have to take help from API,
[code=java]System.setOut(n ew PrintStream(new File("")))[/code]

So how Java updates the System.out as it's final.
Please help me to know it.

Kind regards,
Dmjpro.

Java does not change the System.out at all.
What makes you think that it changes it?

[JosAH]

Java does not change the System.out at all.
What makes you think that it changes it?

Duh, that System class is full of native methods and stuff; it even uses a
sun.misc.Shared Secrets class for several purposes; I don't trust that class
one single bit ;-)

kind regards,

Jos

[r035198x]

Duh, that System class is full of native methods and stuff; it even uses a
sun.misc.Shared Secrets class for several purposes; I don't trust that class
one single bit ;-)

kind regards,

Jos

Version 6? My 1.5.0_03 uses no such secrets.
I

[JosAH]

Version 6? My 1.5.0_03 uses no such secrets.
I

Yup; check your src.zip that comes with the jdk; that class is full of it.

kind regards,

Jos

[r035198x]

Yup; check your src.zip that comes with the jdk; that class is full of it.

kind regards,

Jos

I'm sticking with 1.5 for my current project.
I'd like to find time and look to see what those guys were doing with a secrets class though.

[JosAH]

I'm sticking with 1.5 for my current project.
I'd like to find time and look to see what those guys were doing with a secrets class though.

They don't want us to know that, it's a class in the sun.misc package and they
don't give source for any class in those packages; they're 'SharedSecrets' .

kind regards,

Jos

[Nepomuk]

They don't want us to know that, it's a class in the sun.misc package and they
don't give source for any class in those packages; they're 'SharedSecrets' .

kind regards,

Jos

Reminds me of this issue, but I'd better keep that to myself... ;-)

Greetings,
Nepomuk

[JosAH]

Reminds me of this issue, but I'd better keep that to myself... ;-)

Greetings,
Nepomuk

It doesn't matter much: real men (like me) read octal or hex dumps anyway ;-)

kind regards,

Jos (aka 004a006f0073 (big endian unicode) ;-)

[r035198x]

It doesn't matter much: real men (like me) read octal or hex dumps anyway ;-)

kind regards,

Jos (aka 004a006f0073 (big endian unicode) ;-)

Oh yeah, there is always a legal way of reconstructing someone's source code even though the source code is supposed to be "private".

[dmjpro]

Java does not change the System.out at all.
What makes you think that it changes it?

Then how does Java Manage it?
Please help !

Kind regards,
Dmjpro.

[r035198x]

Then how does Java Manage it?
Please help !

Kind regards,
Dmjpro.

Manage what? I'm not really getting your question here. For printing to the console the methods print and println are used. The variable out itself is not assigned to any other value.

[Nepomuk]

Then how does Java Manage it?
Please help !

Kind regards,
Dmjpro.

I think you misunderstand, what happens. Java can't set the systems standard in- and output, but it can set it's own standard in- and output. (Which is exactly what it does with that method.)

Greetings,
Nepomuk

[dmjpro]

Manage what? I'm not really getting your question here. For printing to the console the methods print and println are used. The variable out itself is not assigned to any other value.

Actually System.out is assigned with that that's why the print or println goes there.
Now if I changed it to file then how Java reassign the System.out or Java does something else.
That's my Question.

Kind regards,
Dmjpro.

[r035198x]

Actually System.out is assigned with that that's why the print or println goes there.
Now if I changed it to file then how Java reassign the System.out or Java does something else.
That's my Question.

Kind regards,
Dmjpro.

When you redirect the output you don't change the out variable itself. It is final and cannot be reassigned.
You just provide the runtime with a new PrintStream object to use when printing out.