第一种：利用Scanner对象

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);  }}

第二种：利用缓存流和输入流

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());  }}

第三种：利用输入框

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);  }}