In Java, any type of data output is possible. It is implemented using the System.out.println () line of code in Java. The main environment for using the method is utility and demo programs. In other types of applications it is not used, since in them the output is carried out through graphical user interfaces with the execution of other methods.
What is a method?
In Java, there are threads through which the output function is executed. Each of them is presented as a separate instruction, the execution order of which is set by the user. Streams are a connecting link between input-output systems and a physical device, therefore the principle of their operation is the same. Only the methods applied to them differ.
In a programming language, byte streams belong to two separate superclasses. This InputStream handles the input function, and the OutputStream handles the output function. They are needed for byte streams, and character classes exist Write and Read. The java.lang package is included in all Java programs. It contains System, which uses some standard elements to execute System.out.println ().
Syntax Overview
To understand how the team works in Java, you need to understand how each individual component of System.out.println () works.
System - the class that the command will refer to upon execution. It encapsulates the necessary tools from classes that provide the method.
Out is a variable that is predefined by the Output class and accepts a stream. It is accessed by System. It is an instance of Output, so it has access to all its methods according to the principles of OOP.
Println () is an instance of the Outputstream class called PrintStream. It contains instructions for processing the data displayed on the screen. The out variable is referred to here. As with any function, arguments can be passed here.
Thus, to output the string Hello, the Java program calls the System, and the latter, in turn, calls to Output, and then to PrintStream, which are instances of the class OutputStream and perform the necessary actions.
Work examples
Work with the method can be provided using the OS terminal or the development environment. Before this, a project and a class with the same names are created. In the window for creating an item, you can check the item of the main method. As a result, we get a code with the necessary data to work. We introduce into the main method block main empty command output to the console.
In Java, the system out println method can output different types of data. To display a string, you must specify the set of any characters in quotation marks as an argument in empty brackets.
The method can pass the values of variables of any type. To do this, enter the name of the variable without quotes from where the value will be taken.
You can also pass the value of several variables and actions on them along with the string.
Such code will output the result of adding variables and strings.
By attaching qualifiers and escape sequences to system out println java, the examples can be implemented in another way.
Here the% d specifier is used, which takes the value of the arguments specified by a comma. In this example, there is no line break. It is provided by the println () method, unlike print () and printf (), which do not translate. This function can be achieved using the escape sequence \ n. It must be added to the line with a space in the place where the transfer is needed.
System.out.println () in Java has its own lists of escape sequences and borrowers from C ++ qualifiers.
Abbreviated input
When you need to reduce code writing time and avoid mistakes, quick ways to write code help. In order to quickly perform abbreviated input of System.out.println () in Java, you must enter syso, press the Enter key. This is done as follows.
When entering the short form of any command, pop-up additions appear. By clicking on one of them, the system will substitute the desired end of the instruction.
Thus, in Java, all output features are implemented. In order to globally master them, quite a bit of practice using all of the above possibilities.