浅析Java常用API(Scanner，Random)匿名对象

import java.util.Scanner;
//从键盘输入三个数，输出最大值
public class ScannerDemo {
  public static void main(String[] args) {
    Scanner s=new Scanner(System.in);
    int num=s.nextInt();
    System.out.println(num);
    String str=s.next();
    System.out.println(str);
    int a=s.nextInt();
    int b=s.nextInt();
    int c=s.nextInt();
    int max=a>b?a:b;
    int endmax=c>max?c:max;
    System.out.println(endmax);

  }
}

import java.util.Random;
import java.util.Scanner;
//猜随机数，只有五次机会
public class DemoRandom {
  public static void main(String[] args) {
    Random r=new Random();
    Scanner s=new Scanner(System.in);
    int res=r.nextInt(100);//[0,100)
    System.out.println(res);
    int i=0;
    while (i<5){
      System.out.println("请输入猜的数字，我们帮你判断");
      int num=s.nextInt();
      if(num>res){
        System.out.println("大了哦");
        i++;
        continue;}
      else if(num<res){
        System.out.println("小了");
        i++;
        continue;
      }
      else {
        System.out.println("猜对了");
        i++;
        break;
      }
    }
    if(i==5)
      System.out.println("你的次数用完了");
    else
      System.out.println("恭喜，你用了"+i+"次");

  }
}

import java.util.Scanner;

/*匿名对象作形参，返回值
*/
public class DemoAnonymous {
  public static void main(String[] args) {
    meth(new Scanner(System.in));
    Scanner s=meth2();
    int num=s.nextInt();
    System.out.println(num);
  }
  public static void meth(Scanner sc){
    int num=sc.nextInt();
    System.out.println(num);
  }
  public static Scanner meth2(){
    return new Scanner(System.in);
  }
}