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This article mainly shows you "what are the input methods in Java", the content is easy to understand, clear, hope to help you solve your doubts, the following let the editor lead you to study and learn "what are the input methods in Java" this article.

This article mainly introduces three input methods in Java to achieve parsing, which is introduced in great detail through the sample code, which has a certain reference and learning value for everyone's study or work. Friends who need it can refer to it.

1. Read char type data from the keyboard

Char ch = (char) System.in.read ()

The read () method provided by System.in can only read one byte of data at a time, so it is used less frequently.

2.BufferedReader implements reading String type data from keyboard

Using the readLine () method of the BufferedReader object must handle the java.io.IOException exception (Exception)

When the input includes spaces, the input string cannot be completely obtained by using Scanner. In this case, you can use the BufferedReader class to get the input

Can be converted to numeric types: long, int, short, byte, double, float, etc.

Import java.io.*

BufferedReader buf = new BufferedReader (new InputStreamReader (System.in ()); String str = buf.readLine ()

3.Scanner implements reading String type data from keyboard

Scanner gets input based on a space character, including the Tab key and the Enter key. When any of these keys are pressed, Scanner returns to the next input.

Import java.util.*

Scanner scanner = new Scanner (System.in); String str = scanner.next ()

.nextLine () gets a line of string, .next () gets a string, .nextInt () converts the acquired string to type int, .nextFloat () converts the acquired string to type float, .nextBoolean (), .nextShort, .nextByte (), .nextDouble (), .nextLong (), and so on.

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