system.out

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 System class, you must refer it as System.out but later in the book it states that the System.out belongs to class PrintStream. I've searched google and stackoverflow but all the answers are too hard for me to understand. "out" belongs to class "System" and is of type "PrintStream" :) Marko Topolnik It depends what you mean by "belongs to". Usually,

This question already has an answer here: Selecting parameters in String.format() [duplicate] 3 answers I am trying to format in java using the printf statement like in this webpage: Click Here . But I just can't figure out what the purpose of the $ sign is. Can someone please explain this to me? Input: java 100 cpp 65 python 50 Expected Output: ( there should be a space instead of _ ) ================================ java___________100 cpp___________065 python_________050 ================================ My code: public class Solution { public static void main(String[] args) { Scanner sc=new

I am just curious to know, what happens when System.out.print() is called in a servlet? Where does it write the text? Or is there any significant use of System.out in a servlet? It depends on your servlet container. For Tomcat : When running Tomcat on unixes, the console output is usually redirected to the file named catalina.out. The name is configurable using an environment variable. (See the startup scripts). Whatever is written to System.err/out will be caught into that file. For jetty , you can redirect standard output to a file : It is possible to redirect all output sent to stderr and

I overheard an argument about System.out.print() today. One person claimed that since print() doesn't including the terminating \n , the buffer it writes to will eventually fill up and start losing data. The other person claimed that they had been using System.out.print() for all their Java programs and had never run into this issue. Is the first person right? Is it possible for System.out.print() to start blocking or dropping data if stdout is full? Is there an example of code that will cause this? When the buffer used by System.out.print fills up, the output is written into the file (or

My teacher wants us to display our values in the format method (at the very bottom) but the problem is we had a sub and she didn't show us how to use it and my teacher is being less than helpful. Any advice or help would be greatly appreciated. public class SphereCalculations { public static void main(String[] args) { //define variables double circumference = 0; double area = 0; double volume = 0; double surfacearea = 0; double radius = 0; Scanner scan = new Scanner (System.in); DecimalFormat dFmt = new DecimalFormat("0.0000"); //prompt for radius System.out.println("Enter the sphere's radius:

I just want to know, we usually close streams at the end, but why don't we close System.out PrintStream with System.out.close() ? If you close it you will no longer be able to write to the console, so let's leave this task to the VM when the process terminates. You should only close streams that you own or have manually created. System.out is out of your control, so leave it to the creator to take care of. ratchet freak because we didn't open it the VM did and it's his job to close it unless otherwise documented it's similar to the C++ adage of I don't own it, don't delete it. You can still

Possible Duplicate: What's the meaning of System.out.println in Java? I was looking for the answer of what System , out and println are in System.out.println() in the Java. I searched and found a different answer like these: System is a built-in class present in java.lang package. This class has a final modifier, which means that, it cannot be inherited by other classes. It contains pre-defined methods and fields, which provides facilities like standard input, output, etc. out is a static final field (ie, variable)in System class which is of the type PrintStream (a built-in class, contains