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摘要: ``` public class HelloWorld { public static void main(String[] args){ //String str = "www.mldn.cn";// 直接赋值-String类对象实例化 String str = new String("www.b 阅读全文
posted @ 2023-06-06 14:24 盘思动 阅读(7) 评论(0) 推荐(0)
摘要: ### demo1 实际项目中经常用到 综合本章很多知识点。 ``` class Member { private String mid ; private String name ; private Role roles [] ; public Member(String mid,String n 阅读全文
posted @ 2023-06-06 13:43 盘思动 阅读(27) 评论(0) 推荐(0)
摘要: ``` class Member { private String mid; private String name; private Product products[]; public Member(String mid,String name){ this.mid = mid; this.na 阅读全文
posted @ 2023-06-06 10:45 盘思动 阅读(12) 评论(0) 推荐(0)
摘要: ``` class Dept {// 部门类 private long deptno; private String dname; private String loc; private Emp emps[]; public Dept(long deptno,String dname,String 阅读全文
posted @ 2023-06-06 10:08 盘思动 阅读(12) 评论(0) 推荐(0)
摘要: ``` class Car { private String name; private double price; private Person person;// 车应该属于一个人 public Car (String name,double price){ this.name = name; 阅读全文
posted @ 2023-06-05 23:13 盘思动 阅读(14) 评论(0) 推荐(0)
摘要: ``` class Car { private String name; private double price; private Person person;// 车应该属于一个人 public Car (String name,double price){ this.name = name; 阅读全文
posted @ 2023-06-05 22:36 盘思动 阅读(14) 评论(0) 推荐(0)
摘要: ### demo1 对象数组,静态初始化 ``` class Person { private String name; private int age; public Person(String name,int age){ this.name = name; this.age = age; } 阅读全文
posted @ 2023-06-05 17:14 盘思动 阅读(10) 评论(0) 推荐(0)
摘要: ``` class ArrayUtil { // 可变参数,传参,不一定非是数组! public static int sum(int... data){// 可变参数,本质上仍然是数组;变种数组; int sum = 0; for(int temp : data){ sum += temp; } 阅读全文
posted @ 2023-06-04 23:57 盘思动 阅读(9) 评论(0) 推荐(0)
摘要: ### demo1 java.util.Arrays.sort() 实现排序 ``` class ArrayUtil { public static void printArray(int temp []){ for(int x = 0;x < temp.length;x++){ System.ou 阅读全文
posted @ 2023-06-04 23:22 盘思动 阅读(8) 评论(0) 推荐(0)
摘要: * 利用数组角标来置换操作 ``` class ArrayUtil { // 数组转置操作,左右排序颠倒操作; public static void reverse(int data []){ int center = data.length / 2; int head = 0; int tail 阅读全文
posted @ 2023-06-04 23:13 盘思动 阅读(16) 评论(0) 推荐(0)
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