The PrintStream is designed to print data at DOS prompt with its print() and println() methods. This stream comes with the ability of automatic flushing of data. In contrary to the methods of all I/O streams, the methods of PrintStream class do not throw IOException. PrintStream methods are deprecated in favor of PrintWriter, but not …
The Scanner class is placed in java.util package (not in java.io) to facilitate to take input for DS (Data structure) elements. The advantage of Scanner class is parsing is not required for keyboard input data which is required with DataInputStream (as in KeyboardReading1.java) and BufferedReader (as in KeyboardReading2.java). Scanner class can not only read from …
The previous program (KeyboardReading1.java) of reading keyboard input, using DataInputStream, raises a deprecation warning. To overcome this, in the following program, the readLine() method of BufferedReader is used. Example on Keyboard Input BufferedReader Java The following program takes input from keyboard to fill the array elements. The elements and their average are printed. import java.io.*; …
In keyboard reading, three programs are given using DataInputStream, BufferedReader and Scanner. Of all, using java.util.Scanner is the easier and includes many methods to check the input data is valid to read. Example on Keyboard Input DataInputStream Following program uses readLine() method of DataInputStream to read data from the keyboard. import java.io.*; public class KeyboardReading1 …
System.out.println() Not only the novices but also a few Programmers do not aware of the meaning of System.out.prinltn() statement. Following is the description of each word in the statement. What is System.out.println()? out is an object PrintStream class defined in System class. out is declared as public, static and final. println() is a method of …
The frame created by the programmer and displayed on the monitor comes with a title bar and three icons(buttons) on the title bar – Minimize, Maximize and Close. The first two works implicitly and the Close does not work and requires extra code to close the frame. Java Frame Closing – 4 styles Four styles …
Access specifiers, as the name indicates, specify the access to our code for other classes – whether other classes can access or not and if permitted, to what extent they can access. Java includes access modifiers also which are quiet different from access specifiers. Java comes with four access specifiers. They are public protected default …
final Keyword Java After going through "static" and "super" keywords, let us go another keyword "final". These three keywords, known as access modifiers, are used very often in Java code. The final keyword behaves very differently when applied to variables, methods and classes. Even though its functionality (purpose) is different in the three contexts, but …
