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1.读取输入

Scanner in = new Scanner(System.in);String name = in.next()

案例一：读取一行和一个数字

public static void main(String[] args) {		Scanner inScanner = new Scanner(System.in);		System.out.println("what is your name?");		String name = inScanner.nextLine();				Scanner inage = new Scanner(System.in);		System.out.println("what is age?");		int  age = inage.nextInt();				System.out.println(age + name);			}

案例2：输入一行数字，用数组接收

public static void main(String[] args) {		Scanner inlength = new Scanner(System.in);		int length = inlength.nextInt();		int[] arr = new int[length];				for (int i = 0; i < arr.length; i++) {			Scanner inScanner = new Scanner(System.in);			arr[i] = inScanner.nextInt();		}				System.out.println(Arrays.toString(arr));	}

public static void main(String[] args) {		Scanner inlength = new Scanner(System.in);		int length = inlength.nextInt();		String[] arr = new String[length];		Scanner inScanner = new Scanner(System.in);		for (int i = 0; i < arr.length; i++) {			arr[i] = inScanner.next();		}				System.out.println(Arrays.toString(arr));	}

java实现一个猜数字的小游戏

import java.util.Random;import java.util.Scanner;public class GuessNumber {	public static void main(String[] args) {		//1.通过Random类中方法nextInt（），生成一个1-100之间的随机数		int randomNumber = new Random().nextInt(100);		System.out.println("随机数已生成！");		//2.输入猜的数字		System.out.println("----请输入您猜的数字：----");		Scanner sc = new Scanner(System.in);		int enterNumber = sc.nextInt();		//3.通过while循环，进行猜数字对错判断		//猜对，跳出循环，游戏结束		while(enterNumber != randomNumber){			//猜错了，根据结果，给出提示，接着猜数字，游戏继续			if(enterNumber>randomNumber) { 				//如果猜大了，打印sorry，您猜大了!继续下一次循环				System.out.println("sorry，您猜大了!继续下一次循环");			}else {				//如果猜小了，打印sorry，您猜小了!继续下一次循环				System.out.println("sorry，您猜小了!继续下一次循环");			}			//输入猜的数字			System.out.println("----请输入您猜的数字：----");			enterNumber = sc.nextInt();		}		System.out.println("恭喜您，答对了！");	}}

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