Three ways to get keyboard input values in Java "Go"

In the process of program development, the need to get input values from the keyboard is common, but Java it is not like the C language to provide us with scanf (), C + + gives us the CIN () to get the keyboard input value of the ready-made function! Java does not provide such a function does not mean that we do not have the experience of this situation, please see the following three ways to solve it:

Several methods are listed below:

Method One: Receive a character from the console and print it out

public static void Main (String [] args) throws ioexception{

System.out.print ("Enter a Char:");

char i = (char) System.in.read ();

System.out.println ("Your char is:" +i);

}

}

Although this method implements the input character from the keyboard, System.out.read () can only be obtained for one character, and the type of the variable entered is only char, and when we enter a number, we want to get an integer variable, We also have to modify the variable types, which makes it more cumbersome.

Method Two: Receive a string from the console and print it out. In this topic, we need to use the BufferedReader class and the InputStreamReader class

public static void Main (String [] args) throws ioexception{

BufferedReader br = new BufferedReader (new InputStreamReader (system.in));

String str = NULL;

System.out.println ("Enter Your Value:");

str = Br.readline ();

SYSTEM.OUT.PRINTLN ("Your value is:" +str);

}

So we can get the string we entered.

Method Three: This method I think is the simplest, the most powerful, is to use the scanner class

public static void Main (String [] args) {

Scanner sc = new Scanner (system.in);

System.out.println ("Please enter your name:");

String name = Sc.nextline ();

System.out.println ("Please enter your Age:");

int age = Sc.nextint ();

System.out.println ("Please enter your salary:");

float salary = sc.nextfloat ();

SYSTEM.OUT.PRINTLN ("Your information is as follows:");

System.out.println ("Name:" +name+ "\ n" + "Age:" +age+ "\ n" + "Salary:" +salary);

}

This code has shown that the scanner class, whether it's a string or integer data or a variable of type float, can do it with a little bit of change! No doubt he is the strongest!

Three ways to get keyboard input values in Java "Go"