java three ways of obtaining data from the command line

The first: the use of Object Scanner

java.util.Scanner Import; 

public  class TestInputOuput {
     public  static  void main (String [] args) { 
        the System. OUT .println ( " Please enter: " ); 
        Scanner InP = new new Scanner (. the System in ); 
        String STR = InP .next (); 
        . System OUT .println ( " you entered: " + str); 
    } 
}

The second: the use of input streams and stream buffers

import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;

public class TestInputOuput {
    public static void main(String[] args) throws IOException {
        System.out.println("请输入：");
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        
        System.out.println("你输入了："+br.readLine());
    }
}

Third: using the input box

javax.swing.JOptionPane Import; 

public  class TestInputOuput {
     public  static  void main (String [] args) { 
        String JOP = JOptionPane.showInputDialog ( null , " enter: " , " input box header " , JOptionPane.QUESTION_MESSAGE);     
        the System. OUT .println ( " you entered: " + JOP); 
    } 
}

 

An input box will pop up after the operation, in the input can be.