const stu1 = { name: "xiaoming", age: 18, friend: { name: "mike", age: 17, },};const stu1_json = JSON.stringify(stu1); /

Javascript 面向对象(OOP)语法class 类名 { constructor(){ }}举例://Person类专门用来创建人的对象class Person { constructor(name,age,hooby){ this.name = name;

let num = 10; console.log(typeof num.toString()); // string let str = "hello world"; console.log(str.split(" &quo

两种对象拷贝 let stu = { name: "meow", age: 17, friend: { name: "mike",

//原始类型 let addr_name = "beijing"; let addr_name2 = addr_name; addr_name = "jinan"; console.log

package sort;import java.util.Arrays;//冒泡排序模板public class bubble_sort { public static void main(String[] args) { int[] arr = {44,-30,20,100,

package sort;import java.util.Arrays;//选择排序模板public class select_sort { public static void main(String[] args) { int[] arr = new int[]{10,20

package sort;import java.util.Arrays;public class insert_sort { public static void main(String[] args) { int[] arr = new int[]{1, 10, -5, 12

package cn.meowrain.Math;public class math { public static void main(String[] args) { //1. abs绝对值 int abs = Math.abs(-19); Sys

String类String 对象用来保存字符串，也就是一组字符序列字符串常量对象使用双引号括起的字符序列字符串的字符使用Unicode字符编码，一个字符占两个字节String类较常用构造器：String s1 = new String();String s2 = new String(String