Scanner总结
//导包
import java.util.Scanner;
public class TextScanner{
public static void main(String [] args){
//创建Scanner对象 接受从控制台输入
Scanner input = new Scanner(System.in);
System.out.println("请输入名字:");
//接受String型
String name = input.next();
System.out.println("请输入学号");
//接受int型
int id = input.nextInt();//什么类型next后面就接什么 注意大小写
//输出结果
System.out.println("名字为:"+name+"\t学号为:"+id);
}
}
package paixu;
import java.util.Arrays;
import java.util.Scanner;
public class Demo09 {
public static void main(String[] args) {
Scanner input=new Scanner(System.in);
System.out.println("请输入学生的个数");
int a = input.nextInt();
int[] arr=new int[a];
for (int i = 0; i < arr.length; i++) {
System.out.println("请输入第"+(i+1)+"名学生的成绩");
arr[i] = input.nextInt();
}
System.out.println(Arrays.toString(arr));
for (int i = 0; i < arr.length-1; i++) {
for (int j = 0; j < arr.length-1-i; j++) {
if(arr[j]>arr[j+1]){
int temp =arr[j];
arr[j]=arr[j+1];
arr[j+1]= temp;
}
}
}
System.out.println(Arrays.toString(arr));
}
}
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package mianxiangduixiang;
import java.util.Scanner;
public class Demo {
public static void main(String[] args) {
/**
* 数组上节课讲了一些算法和排序
* 二维数组
* int[][] arr= new int[4][];
*/
//定义了一个维度是3的二维数组
//多行注释ctr+shift+/
//输入人员来信息存储name age sex
System.out.println("请输入存储多少人");
Scanner in = new Scanner(System.in);
int num = in.nextInt();
//定义个二维数组用来存储
String[][] arr1 = new String[num][3];
for (int i = 0; i < arr1.length; i++) {
System.out.println("请输入姓名");
String name = in.next();
arr1[i][0] = name;
System.out.println("请输入年龄");
String age =in.next();
arr1[i][1] = age;
System.out.println("请输入性别");
String sex = in.next();
arr1[i][2] = sex;
}
for (int i = 0; i < arr1.length; i++) {
String[] p= arr1[i];
System.out.println(p[0]+"========"+p[1]+"=="+p[2]);
}
}
}