Predefined stream object attached to the standard output in Java console applications.
It's a static variable in Java's System class. This tag is intended for questions about Java applications that write to the standard output.
Questions tagged [system.out]
404 questions
6
votes
2 answers
java printing char array
I am running this code and
char[] str = { 'a', 'b', 'c', 0, 'c', 'c', 'f' };
System.out.print(str);
System.out.println(" adksjfhak");
This prints just "abc".
while,
char[] str = { 'a', 'b', 'c', 0, 'c', 'c', 'f'…
sakura
- 392
- 1
- 4
- 12
6
votes
2 answers
if statement inside the print statement?
How can I write an if statement inside the print statement?
public boolean checkEmpty()
{
if(array.isEmpty)
{
Sytem.out.println("The List is empty");
}
else
{
System.out.println("The list has: " + if(array.size()…
mohamed ghassar
- 119
- 1
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- 7
6
votes
3 answers
Intercept System.out and prepend date time in Java
is it possible to intercept calls to System.out.print* and System.err.print* (in Java) and prepend a time stamp to them? Don't worry, we use the usual logging frameworks, but occasionally some sys.out leaks out and it would be nice to know when it…
Ben Smith
- 1,554
- 1
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- 26
6
votes
1 answer
java difference StdOut vs System.out.println
I have just started working on java, As i downloaded the eclipse and created a java project.
Project was working fine, then i imported a class but it's not working due to following lines
StdOut.println(p + " " + q);
after searching i have…
Haseeb Asif
- 1,766
- 2
- 23
- 41
5
votes
1 answer
Formatting java strings with system.out.printf
I've been looking around at a lot of questions about the System.out.printf in java for formatting string outputs and I just don't seem to understand how to use it.
I'm trying to print nice columns that looks like this
601 GoPro Hero5 Black …
user4780727
5
votes
2 answers
What is a relationship between System class and PrintStream Class
I'm trying to know what exactly System.out.println(). I read these two articles
What is System, out, println in System.out.println() in Java and What's the meaning of System.out.println in Java?. I know what is System,out,and print, But i don't know…
Aanshi
- 282
- 1
- 5
- 22
5
votes
3 answers
why we use system.out.flush()?
Can someone please explain why we we would use system.out.flush() in a simpler way? If there could be a chance of losing data, please provide me with an example. If you comment it in the code below nothing changes!
class ReverseApp{
public…
Ali Kashanchi
- 8,620
- 3
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- 11
5
votes
2 answers
Do strings used in a System.out.println also create new immutable objects?
So I'm studying for the SCJP from the Kathy Sierra book.
In the chapter for strings, this is a question:
String s1 = "spring ";
String s2 = s1 + "summer ";
s1.concat( "fall ");
s2.concat(s1);
s1 += "winter";
System.out.println(s1+"…
Nilay Panchal
- 541
- 6
- 17
5
votes
7 answers
Does the System.out object belong to class System or class PrintStream?
I'm new to programming and I just started learning Java. I'm curious that does the object System.out belong to class System or class PrintStream?
I referred to a textbook, JAVA CONCEPTS 4/e. The textbook states that to use the out object in the…
user2236096
- 1,537
- 3
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- 19
5
votes
4 answers
What is the type of System.out in Java?
I am just a newbie in Java. I was wondering the way System.out.println() is used. Out is a static field inside System class. The type of out is PrintStream. But when I saw the constructor of PrintStream class, it takes a parameter of type…
abhithakur88
- 397
- 6
- 18
4
votes
2 answers
System.out is not recognised
This is driving me absolutely crazy. I have a package that was working fine, then I renamed the package and now I cannot use System.out (or anything in the System class). For what it's worth here is my Main class (I've removed EVERYTHING except the…
takesides
- 127
- 1
- 1
- 10
4
votes
1 answer
In java, How System.out.println method works in both static and non static context?
How System.out.println method works in both static and non static context?
Is there any JVM specific implementation is the answer for this?
bpn
- 47
- 3
4
votes
0 answers
Restoring the System.out - PrintStream
I recently recognized that you're able to close the PrintStream System.out!
So the code snippet:
System.out.println("foo");
System.out.close();
System.out.println("bar");
will produce the output:
foo
instead of:
foo
bar
Now to my question:
Is…
ParkerHalo
- 4,341
- 9
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- 51
4
votes
0 answers
System out, in and err streams declared null
I looked at java.lang.System source code and found the following lines:
public final static InputStream in = null;
public final static PrintStream out = null;
public final static PrintStream err = null;
I know that a final reference can't be…
Brrch
- 331
- 1
- 4
4
votes
4 answers
System.out.print of string without 'ln'
I have a byte array which looks like this:
[0, 0, 0, 0, 0, 0, 0, 0, 122, 98, 117, 54, 46, 0, 0, 115, 122, 42, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 116, 121, 116, 117, 108, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 32, 107, 111,…
Rop
- 217
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