java之从命令行获取数据的三种方式

import java.util.Scanner;

public class TestInputOuput {
    public static void main(String[] args) {
        System.out.println("请输入：");
        Scanner inp = new Scanner(System.in);
        String str = inp.next();
        System.out.println("你输入了："+str);
    }
}

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());
    }
}

import javax.swing.JOptionPane;

public class TestInputOuput {
    public static void main(String[] args) {
        String jop = JOptionPane.showInputDialog(null,"请输入: ","输入框标题",JOptionPane.QUESTION_MESSAGE);    
        System.out.println("你输入了："+jop);
    }
}