Why system.out.println

They are accessed by using the System. These methods are overloaded to deal with different argument types. Remember that these methods do not take a variable number of arguments. In this tutorial, we learned how the System. HowTo Java Howtos Java system. How Does System.

In this tutorial, we will try to understand the internal working of this method. What Is System. The System is a final class of the java. The initializeSystemClass is used to initialise it. The System class contains an instance of the PrintStream class.

This instance variable is called out. It is defined with the modifiers public , static , and final. The PrintStream class contains multiple overloaded print and println methods. In any POSIX compliant shell, each process gets three "standard" streams when the shell starts it: The "standard input" stream is for reading input. The "standard output" stream is for writing ordinary output. The "standard error" stream is for writing error output.

If you do this, one or more of the standard streams is NOT connected to the console. Further reading: "What are stdin, stdout and stderr on Linux? The parent shell forks a child process The child process closes file descriptor 1 the standard output file descriptor The child process opens "bbb.

The child process execs the "aaa" command, and it becomes the "aaa" command process. The file descriptors 0, 1, and 2 are preserved by the exec call.

The "aaa" command starts The same thing happens when "aaa" is the java command. Improve this answer. Stephen C Stephen C k 90 90 gold badges silver badges bronze badges. I tried doing java MyJava abcd. So I got that now. Now am trying to understand: "because that is what the parent process has told the Java program to do". Add a comment. For example, in Unix terminals you can do something like: java -jar your.

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